WO2004008671A1 - 通信方法およびそれを用いた送信装置と受信装置 - Google Patents
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- WO2004008671A1 WO2004008671A1 PCT/JP2003/009011 JP0309011W WO2004008671A1 WO 2004008671 A1 WO2004008671 A1 WO 2004008671A1 JP 0309011 W JP0309011 W JP 0309011W WO 2004008671 A1 WO2004008671 A1 WO 2004008671A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B14/00—Transmission systems not characterised by the medium used for transmission
- H04B14/002—Transmission systems not characterised by the medium used for transmission characterised by the use of a carrier modulation
- H04B14/006—Angle modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2662—Symbol synchronisation
Definitions
- the present invention relates to a communication method and a transmitting device and a receiving device using the same.
- FIG. 1 is a block diagram illustrating an example of a configuration of a conventional wireless transmission device and a conventional reception device.
- Modulation signal generation section 02 receives transmission digital signal 01 as input and outputs modulation signal 03.
- Radio section 04 receives the modulated signal as input and outputs transmission signal 05.
- the power amplification unit 06 receives the transmission signal 05 as an input, amplifies the transmission signal 05, outputs an amplified transmission signal 07, and outputs the amplified transmission signal 07 as a radio wave from the antenna 08. Is done.
- Radio section 11 receives reception signal 10 received from antenna 09 as input, and outputs reception orthogonal baseband signal 12.
- the demodulation unit 13 receives the received quadrature baseband signal 12 as an input and outputs a received digital signal 14.
- the receiving apparatus needs to perform high-precision separation and demodulation when separating and demodulating the transmitted multiplexed modulated signal. Disclosure of the invention
- An object of the present invention is to achieve both data transmission speed and transmission quality. It is an object of the present invention to provide a communication method capable of performing the above and a transmitting device and a receiving device using the same.
- the transmitting device multiplexing and transmitting a plurality of modulated signals
- the receiving device separating and demodulating the transmitted multiplexed modulated signal to improve the data transmission speed.
- one is a method of transmitting one modulated signal of the communication method depending on the frequency and time
- the other is a method of multiplexing and transmitting a plurality of modulated signals of the communication method.
- the frequency or time of the method of transmitting one modulated signal of the communication method, or multiplexing multiple modulated signals of the communication method and performing communication at the frequency or time of the method of transmitting information can be compatible.
- FIG. 1 is a block diagram illustrating an example of a configuration of a conventional wireless transmission device and a conventional reception device.
- FIG. 2 is a diagram illustrating an example of a frame configuration on a frequency-time axis of each channel according to Embodiment 1 of the present invention.
- FIG. 3 is a block diagram showing a configuration of the transmitting apparatus of the present embodiment
- FIG. 4 is a block diagram showing the configuration of the receiving apparatus of the present embodiment
- FIG. 5 is a diagram showing an example of an arrangement state of base stations and terminals according to Embodiment 2 of the present invention.
- FIG. 6 is a block diagram illustrating an example of the configuration of the receiving apparatus according to the present embodiment
- FIG. 7 is a block diagram illustrating an example of the configuration of the transmitting apparatus according to the present embodiment
- FIG. FIG. 9 is a block diagram illustrating an example of a device configuration
- FIG. 9 is a diagram illustrating a communication signal frame configuration according to Embodiment 3 of the present invention
- FIG. 0 is a communication signal frame configuration according to Embodiment 3 of the present invention.
- Diagram FIG. 11 is a diagram showing a frequency arrangement of a base station transmission signal in the present embodiment of the present embodiment,
- FIG. 12 is a block diagram illustrating an example of a configuration of a transmitting device of a base station according to the present embodiment.
- FIG. 13 is a block diagram illustrating a configuration of a terminal receiving device according to the present embodiment
- FIG. 14 is a diagram illustrating an example of a configuration of a terminal receiving device according to Embodiment 4 of the present invention
- FIG. 15 is a diagram illustrating an example of a configuration of a transmitting device of a base station according to the present embodiment
- FIG. 16 is an example of a frame configuration of a channel A and a channel B in a temporal frequency axis according to the present embodiment.
- FIG. 17 is a diagram illustrating an example of a configuration of a receiving apparatus according to Embodiment 5 of the present invention.
- FIG. 18 is a block diagram illustrating an example of a configuration of a receiving apparatus of a terminal according to Embodiment 6 of the present invention.
- FIG. 19 is a diagram illustrating an example of a transmission signal frame configuration transmitted by the base station according to Embodiment 7 of the present invention.
- FIG. 20 is a block diagram showing an example of a configuration of a transmitting apparatus according to Embodiment 7 of the present invention.
- FIG. 21 is a block diagram illustrating an example of a configuration of a receiving apparatus according to Embodiment 7 of the present invention.
- FIG.22A is a diagram showing an example of signal point arrangement on the I-Q plane when a signal of channel B is differentially encoded with respect to a signal of channel A,
- FIG. 22B is a diagram showing an example of signal point arrangement on the I-plane when the signal of channel B is differentially encoded with respect to the signal of channel A.
- FIG. 22C is a diagram showing an example of signal point arrangement on the IQ plane when the signal of channel B is differentially encoded with respect to the signal of channel A.
- Figure 22 shows that channel B signal is differentially coded from channel A signal.
- Figure 22 shows an example of signal point arrangement on the I-Q plane
- FIG. 22E is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially encoded with respect to the signal of channel A.
- FIG. 22F is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially encoded with respect to the signal of channel A.
- Fig. 22G is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially encoded with respect to the signal of channel A.
- Figure 22H is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially coded with respect to the signal of channel A.
- Figure 23A is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially coded with respect to the signal of channel A.
- Figure 23B is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially coded with respect to the signal of channel A.
- Figure 23C is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially coded with respect to the signal of channel A.
- Figure 23D is a diagram showing an example of signal point arrangement on the I-Q plane when the signal of channel B is differentially encoded with respect to the signal of channel A.
- FIG. 24A is a diagram showing an example of a case where signal points are arranged on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A.
- FIG. 24B is a diagram showing an example when signal points are arranged on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A.
- FIG. 24C is a diagram showing an example of a signal point arrangement on the I-Q plane of multi-level modulation of channel B based on the PSK modulation of channel A.
- FIG. 24D is a diagram showing an example of performing signal point arrangement on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A,
- Figure 25A shows I-channel modulation of channel B based on PSK modulation of channel A.
- Fig. 25B is a diagram showing an example of a case where signal points are arranged on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A.
- FIG. 25C is a diagram showing an example of a case where signal points are arranged on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A.
- Fig. 25D is a diagram showing an example of the case where signal points are arranged on the I-Q plane of multi-level modulation of channel B based on the PSK modulation of channel A.
- FIG. 26A is a diagram showing an example of a case where signal points are arranged on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A.
- FIG. 26B is a diagram showing an example in which signal points are arranged on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A.
- FIG. 26C is a diagram illustrating an example of a case where signal points are arranged on the I-Q plane of multi-level modulation of channel B based on PSK modulation of channel A.
- Figure 26D is a diagram showing an example in which signal points are arranged on the I-Q plane for multi-modulation of channel B based on PSK modulation of channel A.
- FIG. 27 is a diagram illustrating an example of a frame configuration of a base station transmission signal according to the present embodiment
- FIG. 28 is a diagram illustrating an example of a signal point arrangement on an IQ plane of the pilot symbolonore according to the present embodiment.
- FIG. 29 is a diagram illustrating an example of a frame configuration of a base station transmission signal according to the present embodiment.
- FIG. 30 is a diagram illustrating an example of a configuration of a receiving device according to the present embodiment.
- FIG. 31 is a block diagram illustrating an example of a demodulating unit according to the present embodiment.
- FIG. 32 is a block diagram illustrating an example of a demodulation unit according to the present embodiment.
- FIG. 33 is a block diagram illustrating an example of a demodulation unit according to the present embodiment.
- FIG. 34 is a block diagram illustrating an example of a demodulation unit according to the present embodiment.
- FIG. 35 is a block diagram illustrating an example of a configuration of a receiving device according to the present embodiment.
- FIG. 36 is a block diagram illustrating an example of a demodulation unit according to the present embodiment.
- FIG. 37 is a block diagram illustrating an example of a configuration of a transmission device according to Embodiment 8 of the present invention.
- FIG. 38 is a block diagram showing an example of a configuration of a receiving apparatus according to Embodiment 8 of the present invention.
- FIG. 39 is a diagram illustrating an example of an arrangement of base stations according to Embodiment 9 of the present invention.
- FIG. 40 is a block diagram illustrating a configuration of a receiving device of the base station according to Embodiment 9 of the present invention.
- FIG. 41 is a block diagram illustrating a configuration of a transmission device of a base station according to Embodiment 9 of the present invention.
- FIG. 42 is a diagram showing an example of a configuration of a receiving device of a terminal according to Embodiment 9 of the present invention.
- FIG. 43 is a diagram showing an example of a configuration of a transmitting apparatus of a terminal according to Embodiment 9 of the present invention.
- FIG. 44 is a diagram illustrating an example of an arrangement of base stations according to Embodiment 9 of the present invention.
- FIG. 45 is a diagram illustrating an example of a frame configuration of the base station according to Embodiment 10 of the present invention.
- FIG. 46 is a diagram showing an example of a frame configuration of a base station according to Embodiment 10 of the present invention.
- FIG. 47 is a diagram illustrating an example of a configuration of a transmission device of a base station according to Embodiment 10 of the present invention.
- FIG. 48 is a diagram illustrating an example of a configuration of a receiving device of a base station according to Embodiment 10 of the present invention.
- FIG. 49 is a diagram illustrating an example of a configuration of a receiving device of a terminal according to Embodiment 10 of the present invention.
- FIG. 50 shows an example of a configuration of a transmitting apparatus of a terminal according to Embodiment 10 of the present invention.
- FIG. 51 is a diagram showing an example of a frame configuration of a modulated signal transmitted by the terminal according to Embodiment 10 of the present invention.
- FIG. 52 is a diagram showing an example of a configuration of a receiving device of a terminal according to Embodiment 10 of the present invention.
- FIG. 53 is a block diagram illustrating an example of a frame configuration of a transmission signal of a base station according to Embodiment 12 of the present invention.
- FIG. 54 is a diagram illustrating an example of a configuration of a receiving device of a terminal according to Embodiment 12 of the present invention.
- FIG. 55 is a diagram showing an example of a configuration of a transmitting apparatus of a terminal according to Embodiment 11 of the present invention.
- FIG. 56 is a diagram showing an example of a frame configuration of a modulated signal transmitted by the terminal according to the present embodiment
- FIG. 57 is a diagram illustrating an example of a configuration of a transmission device of a base station according to Embodiment 11 of the present invention.
- FIG. 58 is a diagram illustrating an example of a configuration of a receiving device of a base station according to Embodiment 11 of the present invention.
- FIG. 59 is a diagram showing an example of a configuration of a transmission device of a base station according to Embodiment 11 of the present invention.
- FIG. 60 is a diagram illustrating a configuration example of a channel multiplex communication system using a beam spatial mode represented by an eigenmode in a MIMO system.
- FIG. 2 is a diagram showing an example of a frame configuration on the frequency-time axis of each channel according to Embodiment 1 of the present invention.
- the vertical axis indicates frequency
- the horizontal axis indicates time.
- 101 indicates a guard symbol
- 102 indicates an information symbol
- 103 indicates an estimation symbol
- 104 indicates a control symbol.
- guard symbol 101 is a symbol in which no modulated signal exists.
- the estimation symbol 103 is, for example, a pilot symbol for estimating time synchronization, frequency synchronization, or distortion due to a transmission path, or a unique word or preamble, and is a known symbol, for example, a BPSK modulated signal. Is suitable.
- the control symbol 104 is a symbol for transmitting information used by the terminal for control, and is a symbol for transmitting information using the information symbol 102.
- the communication method according to the present embodiment is characterized in that, on a certain carrier 1, only symbols of one channel are transmitted, and information symbols of a plurality of channels are multiplexed and transmitted on another carrier.
- estimation symbol of channel A is transmitted from carrier 1 to carrier 6, and the estimation symbol of channel A and the estimation symbol of channel B are multiplexed and transmitted from carrier 7 to carrier 12.
- FIG. 3 is a block diagram showing a configuration of the transmitting apparatus according to the present embodiment.
- the frame configuration signal generator 2 21 generates frame configuration information based on the input control signal 2 2 3, and generates a frame configuration signal 2 2 composed of the frame configuration information. 2 is output to the serial / parallel converter 202 and the serial / parallel converter 212.
- carrier A arranges information symbols, estimation symbols, and control symbols on carriers 1 to 12 and transmits signals.
- serial / parallel conversion section 202 converts the transmission digital signal 201 of channel A into parallel data arranged according to the frame configuration signal 222, and converts the converted parallel signal 203 to the inverse discrete Fourier transform section 202. 0 Output to 4. Specifically, as shown in FIG. 2, serial-parallel conversion section 202 arranges information symbols, estimation symbols, and control symbols on carriers 1 to 12.
- the inverse discrete Fourier transform unit 204 performs an inverse discrete Fourier transform on the channel A paralenole signal 203 and outputs the converted signal 205 to the radio unit 206.
- Radio section 206 converts signal 205 to a radio frequency to generate transmission signal 207, and outputs transmission signal 207 to power amplification section 208.
- the power amplifying unit 208 amplifies the power of the transmission signal 207, and the amplified transmission signal 209 is transmitted from the antenna 210 as a radio wave.
- channel B is processed by the serial-parallel converter 2 12, the inverse discrete Fourier transformer 2 14, the radio unit 2 16, the power amplifier 2 18, and the antenna 220.
- the transmitting part will be described.
- guard symbols are allocated to carriers 1 to 6, and information symbols, estimation symbols, and control symbols are allocated to carriers 6 to 12, and signals are transmitted.
- the serial / parallel converter 2 1 2 converts the transmission digital signal 2 1 1 of channel B into parallel data arranged according to the frame configuration signal 2 2 2, and converts the converted parallel signal 2 1 3 into the inverse discrete Fourier converter 2 Output to 14
- the inverse discrete Fourier transform unit 2 14 performs a parallel signal 2 13 inverse discrete Fourier transform, and outputs the converted signal 2 15 to the radio unit 2 16.
- Radio section 2 16 converts converted signal 2 15 into a radio frequency to generate transmission signal 2 17, and outputs transmission signal 2 17 to power amplification section 2 18.
- the power amplifying section 218 amplifies the power of the transmission signal 217, and the amplified transmission signal 219 is transmitted from the antenna 220 as a radio wave.
- the carrier in which the guard symbol is arranged and the carrier in which the information symbol is arranged are separated, and in another channel, the information symbol is abolished for all carriers, and the same carrier is shared (multiplexed) by a plurality of channels. I do.
- the transmitting apparatus of FIG. 3 transmits a signal in the frame configuration of FIG. 2 will be described.
- the serial / parallel converter 202 receives the transmission digital signal 201 and the frame configuration signal 222, and arranges symbols according to the channel A frame configuration in FIG. 2, that is, from carrier 1 to carrier 1
- the information symbols, control symbols, and estimation symbols are arranged in 2 to form a frame, and a parallel signal 203 of channel A is generated.
- the channel B serial / parallel conversion section 211 receives the transmission digital signal 211 of channel B and the frame configuration signal 222, and arranges symbols according to the frame configuration of channel B in FIG.
- the information symbols, control symbols, and estimation symbols are arranged from carrier 7 to carrier 12 to form a frame, and parallel signal 2 13 of channel ⁇ is generated.
- the estimation symbol 103 is inserted for time synchronization and frequency offset estimation.
- the estimation symbols of carrier 1 to carrier 6 of channel ⁇ are used by the receiving apparatus to estimate the channel distortion and demodulate the information symbols of carrier A to carrier 6 of channel A.
- no estimation symbol is inserted from carrier 1 to carrier 6 in channel B.
- the estimation symbols of carriers 7 to 12 of channels A and B are symbols for separating information symbols of carriers 12 from carriers 7 of channels A and B.
- the estimation symbols consisting of carrier 7 to carrier 12 of channel A and the estimation symbols consisting of carrier 12 to carrier B of channel B are orthogonal, so that the carrier symbols of channel A and channel B are used. It is easy to separate the information symbols of the carrier 12 from.
- the information symbol of carrier 1 to carrier 6 of channel A at the receiving device is compared.
- the quality of the channel is better than that of Carrier 12 to Carrier 12 on Channel A and Channel B.
- it is suitable for transmitting information of high importance in the information symbol of carrier 1 to carrier 6 of channel A.
- the importance indicates data for which reception quality is to be ensured, for example, information on a modulation method and an error correction method, and information on a procedure of a transceiver.
- video information is transmitted using information symbols of channel A of carrier 1 to carrier 6, and high-definition video is transmitted using information symbols of channel A and channel B of carrier 12 from carrier 7.
- one type of information medium can be transmitted on channel A from carrier 1 to carrier 6 and one type of information medium can be transmitted on channel A and channel B from carrier 7 to carrier 12.
- the same type of information medium may be transmitted in transmission on channel A from carrier 1 to carrier 6 and transmission on channel A and channel B from carrier 7 to carrier 12.
- the same type of information has a different compression ratio at the time of encoding, for example.
- the compression rate of channel A is lower than the compression rate of channel B.
- some information that is the information symbol of channel A of carrier 1 to carrier 6 It is also possible to transmit information hierarchically, for example, by transmitting information and differential information using the information symbols of channel A and channel B of carrier 7 to carrier 12.
- FIG. 4 is a block diagram showing a configuration of the receiving apparatus according to the present embodiment.
- FIG. 4 shows an example of the configuration of the receiving apparatus according to the present embodiment.
- radio section 303 converts received signal 302 received by antenna 301 to a baseband frequency, and transforms converted orthogonal baseband signal 304 to a Fourier transform section 304. Is output to the synchronization section 3 3 4.
- the Fourier transform unit 305 performs a Fourier transform on the received orthogonal baseband signal 304, and converts the converted parallel signal 306 into a channel distortion estimator 307, a channel distortion estimator 309, signal processing Output to section 3 2 1, selection section 3 2 8, and frequency offset estimation section 3 32.
- the channel distortion estimator 307 estimates the channel distortion of channel A from the estimation symbols of the parallel signal 306, and transmits the channel A parallel signal 308 of channel A to the signal processor 321. Output.
- the channel distortion estimator 309 estimates the channel distortion of channel B from the estimation symbols of the parallel signal 306, and outputs the channel B parallel signal 310 of the channel B to the signal processor 321. Output.
- Radio section 3 1 3 converts received signal 3 1 2 received by antenna 3 1 1 into a baseband frequency, and converts received orthogonal baseband signal 3 1 4 after conversion into Fourier transform section 3 1 5 and synchronization section 3 3 Output to 4.
- the Fourier transform unit 3 15 performs a Fourier transform on the received orthogonal baseband signal 3 14, and converts the converted parallel signal 3 16 into a transmission line distortion estimation unit 3 17, a transmission line distortion estimation unit 3 19, and a signal processing unit 3 2 1, selection section 3 2 8, and frequency offset estimation section 3 3 2 Output to
- the channel distortion estimator 3 17 estimates the channel A channel distortion from the estimation symbols of the parallel signal 3 16, and transmits the channel A channel distortion parallel signal 3 18 to the signal processor 3 2 1 Output.
- the channel B channel distortion estimator 3 19 estimates the channel B channel distortion from the estimation symbol of the parallel signal 3 16, and converts the channel B channel distortion parallel signal 3 20 into the signal processor 3. 2 Output to 1.
- the signal processing unit 3 2 1 generates the parallel signals 3 0 6 and 3 1 based on the channel A transmission line distortion parallel signals 3 08 and 3 18 and the channel B transmission line distortion parallel signals 3 1 0 and 3 2 0. 6 is separated into channel A and channel B signals. That is, the signal processing unit 3 2 1 separates the channel A and channel B signals of carrier 12 from carrier 7 where channel A and channel B are multiplexed in FIG. A parallel signal 322 of A is output to demodulation section 3 24, and parallel signal 3 23 3 of carrier 12 from carrier 7 is output to demodulation section 3 26.
- the demodulation unit 324 demodulates the parallel signal 322 of the channel A of the carrier 12 from the carrier 7 and outputs the demodulated received digital signal 325.
- the demodulation unit 326 demodulates the parallel signal 323 of the channel B of the carrier 12 from the carrier 7 and outputs the demodulated received digital signal 327.
- the selection unit 328 receives the parallel signals 306 and 316 as inputs and selects, for example, the parallel signal having the higher electric field strength, and converts the selected parallel signal into a parallel signal 329 as the demodulation unit 328. Output to 30.
- the demodulation section 330 estimates the transmission line distortion from the non-multiplexed carrier 1 to carrier 6 estimation symbols 103 in FIG. 2 for the selected parallel signal 32 9, and estimates the estimated transmission line distortion.
- the frequency offset estimator 3 32 estimates the amount of frequency offset from the estimation symbols of FIG. 2 using the parallel signals 3 06 and 3 1 6, and converts the frequency offset estimation signal 3 3 3 into the radio section 3 0 and the radio section 3 1. Output to 3.
- the frequency offset estimating unit 3332 inputs the frequency offset estimation signal to the radio units 303 and 313, and the radio units 303 and 313 remove the frequency offset of the received signal.
- the synchronization section 334 4 synchronizes the time with the reception quadrature baseband signals 304, 314 using the estimation symbols in FIG. 2, and converts the timing signal 335 into the Fourier transform section 305 and the Fourier transform section 331. Output to 5. That is, the synchronization section 334 detects the estimation orthogonal symbol 103 of FIG. 2 in the received orthogonal baseband signal 304 and the received signal 314, so that the receiving apparatus is time-synchronized with the transmitting apparatus. Can be. Further, frequency offset estimating section 33 32 estimates the frequency offset from estimation symbol 103 in FIG. 2 in parallel signals 303 and 316.
- the signal processing unit 3 2 1 separates the multiplexed signals of channel A and channel B from carrier 7 to carrier 12 in FIG. 2, and respectively converts the parallel signal of channel A 3 2 2 and the parallel signal 3 of channel B 3 Output as 2 3
- the demodulation unit 324 demodulates the parallel signal 322 of the channel A of the carrier 12 from the carrier 7. Further, the demodulation unit 326 demodulates the parallel signal 323 of the carrier 12 channel B from the carrier 7.
- the demodulation section 330 estimates the transmission line distortion from the non-multiplexed carrier 1 to carrier 6 estimation symbols 103 in FIG. 2 for the selected parallel signal 32 9, and estimates the estimated transmission line distortion. Demodulates parallel signals from carrier 1 to carrier 6 from.
- the received digital signals 3 25 and 3 27 obtained from channel A and channel B of carrier 12 from carrier 7 are compared with the received digital signals 3 31 of channel A of carrier 1 to carrier 6, and Poor quality, but high-speed transmission. Therefore, the received digital signal of channel A of carrier 1 to carrier 6 No. 3 31 is suitable for transmission of important information and control information.
- received digital signals 325 and 327 obtained from channel A and channel B of carrier 12 from carrier 7 are input to decoder X (not shown) and decoded.
- the received digital signal 331 of channel A of carrier 1 to carrier 6 is input to a decoder Y (not shown) and decoded.
- the video is transmitted by the received digital signal 331 of channel A from carrier 1 to carrier 6, and the difference information for the high-definition video is obtained from carrier 7 by the received digital signal obtained from channel A and channel B of carrier 12.
- Hierarchical transmission can be performed with 325 and 327.
- a frame for transmitting a plurality of modulated signals from a plurality of antennas and a frame for transmitting a modulated signal from one antenna are created, and important information is stored in one.
- the modulated signal transmitted from the antenna the data quality can be ensured in the receiving apparatus.
- the transmitting apparatus and the receiving apparatus of the present embodiment by transmitting different information in a frame for transmitting a plurality of modulated signals from a plurality of antennas and in a frame for transmitting a modulated signal from one antenna, quality and quality are improved. Information with different transmission speeds can be transmitted.
- FIGS. 2, 3, and 4 have described an example of a multiplexed frame with two antennas and two multiplexed frames with no channels, the present invention is not limited to this.
- the same can be applied to a multiplexed frame with three antennas with three channels, a multiplexed frame with two channels with two antennas, and a frame with unmultiplexed frames. It is possible.
- the frame configuration is not limited to FIG.
- OFDM Orthogonal Frequency Division Multiplex-Code Division Multiplex
- one antenna may constitute one antenna by a plurality of antennas.
- Embodiment 2 of the present invention when a base station uses a multi-carrier communication scheme in which a base station communicates with a plurality of terminals, non-multiplexed carriers and multiplexed carriers are prepared in a transmission frame of the base station.
- the following describes a communication method for transmitting a modulated signal on one of the carriers, and a transmitting device and a receiving device.
- FIG. 5 are diagrams showing an example of the arrangement state of base stations and terminals according to Embodiment 2 of the present invention.
- 401 is a base station
- 402 is a terminal A
- 403 is a terminal B
- 404 is a terminal C
- 405 is a terminal D
- 406 is a transmission of the base station 401. It shows the signal communication limit.
- the terminals A 402 and B 403 far from the base station 401 have poor reception conditions.
- the terminal C 404 and the terminal D 405 have a good reception state because the distance from the base station 401 is short.
- the base station including the transmitting apparatus according to the present embodiment is allocated to communication terminals in units of three carriers, for example, as shown in FIG.
- carrier 7 to carrier 9 in FIG. 2 for communication with terminal C 404 having a good reception state, and carrier 10 to carrier 1 in FIG. 2 for communication with terminal D 405. 2 for communication on channel A and channel B Therefore, the transmission speed is high.
- carrier 1 to carrier 3 in Fig. 2 are allocated for communication with terminal A 402 with poor reception, carrier 6 from carrier 4 in Fig. 2 for communication with terminal B 403, and channel A is used. Since communication is being performed, the transmission speed is low, but the transmission quality is good.
- control symbols 103 in FIG. 2 information about channel allocation is transmitted by control symbols 103 in FIG. 2, and the terminal demodulates control symbols 103 so that information for itself can be allocated anywhere in the frame. You can know if you are.
- FIG. 6 is a block diagram showing an example of the configuration of the receiving apparatus according to the present embodiment. However, components having the same configuration as in FIG. 4 are assigned the same reference numerals as in FIG. 4 and detailed description is omitted. Fig. 4
- the radio wave propagation environment estimating unit 501 extracts the electric field strength of the signals received by the antenna 301 and the antenna 311, the multipath environment, the Doppler frequency, the direction of arrival, and the channel from the parallel signals 306 and 316. Estimates fluctuation, disturbance wave intensity, polarization state, and delay profile and outputs it as radio wave propagation environment information 502.
- FIG. 7 is a block diagram showing an example of the configuration of the transmitting apparatus according to the present embodiment.
- the information generating unit 604 generates data 601 and radio wave propagation environment information 602 according to required information 603 such as a transmission rate, a modulation method, and a transmission quality required by a user or a communication terminal.
- required information 603 such as a transmission rate, a modulation method, and a transmission quality required by a user or a communication terminal.
- a transmission digital signal 605 is generated, and the transmission digital signal 605 is output to the modulation signal generation section 606.
- Modulation signal generation section 606 modulates transmission digital signal 605 and outputs transmission quadrature baseband signal 607 to radio section 608.
- Radio section 608 converts transmission orthogonal baseband signal 607 into a radio frequency to generate modulated signal 609, and modulated signal 609 is output as a radio wave from antenna 610.
- Radio wave propagation ring of the receiver in Fig. 6 The radio wave propagation environment information 502 estimated by the boundary estimating unit 501 corresponds to the radio wave propagation environment information 602, and is input to the information generation unit 604.
- the information generator 604 is for data 601, radio wave propagation environment information 602, information required by users and communication terminals, for example, the information generator 604 is for transmission speed, modulation method, transmission quality
- a transmission digital signal 605 is generated from the request information 603 such as the above.
- the terminal transmits a signal including a radio wave propagation environment when the terminal receives the modulated signal transmitted by the base station and request information requested by the user or the terminal.
- the information generating unit 604 includes data 601, radio wave propagation environment information 602, information required by a user or a communication terminal, such as a transmission speed, a modulation method,
- the communication method is determined and requested from the request information 603 such as transmission quality, and the transmission digital signal 605 is output.
- the transmission digital signal 605 contains the information of the requested communication system.
- the communication method is information on whether communication is performed using multiplexed signals or communication using non-multiplexed signals.
- FIG. 8 is a block diagram showing an example of the configuration of the receiving device according to the present embodiment.
- radio section 703 converts received signal 702 received by antenna 701 into a baseband frequency, and outputs a received quadrature baseband signal 704 to demodulation section 705.
- Demodulation section 705 demodulates received quadrature baseband signal 704 and outputs received digital signal 706 to scheme determination section 708.
- the method determining unit 708 extracts the radio wave propagation environment information and request information included in the received digital signal 706 and transmits the signal to the terminal by the base station, i.e., a signal of a plurality of channels from a plurality of antennas. Select the transmission method or the method of transmitting the signal of one channel without duplicating the signals of multiple channels.
- the method determining unit 707 extracts the radio wave propagation environment information and request information included in the signal transmitted by the transmitter of terminal A in Fig. 6, or extracts the requested communication method information, And a method of transmitting a signal of one channel without multiplexing signals of a plurality of channels, and outputs it as a control signal 708.
- the frame configuration signal generation unit 221 in the base station transmitting apparatus of FIG. 3 receives the control signal 708 from the receiving apparatus for the terminal A, the terminal B, the terminal, and the terminal D as the control signal 2 23, and Outputs configuration signal 2 2 2.
- the transmitter of the base station can transmit the modulated signal according to the frame configuration of FIG.
- the quality of the information symbol of channel A from carrier 1 to carrier 6 is better than the information symbol of channel A from carrier 7 to carrier 12 and the information symbol of channel B. Good.
- the base station transmits information to the terminal using the information symbols of channel A from carrier 1 to carrier 6 to maintain the data quality, and as a system Stabilize.
- the base station when the terminal and the base station start communication, the base station first transmits the estimation symbol 103 to the terminal as shown in FIG. 2, and the terminal transmits the estimation symbol 103 transmitted first. And the terminal transmits radio wave propagation environment estimation information and request information.
- the base station transmits information using information symbols of channel A from carrier 1 to carrier 6 or information on channel A from carrier 7 to carrier 12 Symbols and chars Transmit information using the information symbol of panel B or select, and start communication. As a result, the quality of the data can be maintained and the system becomes stable.
- the base station transmits the estimation symbol 103 to the terminal first as shown in FIG. 2, and the terminal transmits the estimation symbolonore 103 transmitted first.
- the radio wave propagation environment is estimated, the information is transmitted using the information symbol of channel A from carrier 1 to carrier 6 in consideration of the radio wave propagation environment estimation information and the required information, or from carrier 7 to carrier 12 Select whether to transmit information using the information symbol of channel A and the information symbol of channel B, and request the base station.
- the base station based on the request from the terminal, transmits information using the information symbol of channel 'A' from carrier 1 to carrier 6, the information symbol of channel A from carrier 7 to carrier 12, and the information symbol of channel B Select the power to transmit information with and start communication. This stabilizes the system because the data quality can be maintained.
- the transmitting apparatus and the receiving apparatus of the present embodiment when the base station communicates with a plurality of terminals, multiplexing is performed for communication with a terminal having a poor reception state in a transmission frame of the base station.
- terminals can achieve both data transmission speed and transmission quality.
- FIGS. 2, 3, and 4 have been described by taking as an example a frame that is not multiplexed with a multiplexed frame having two antennas and two channels, but is not limited thereto.
- the present invention can be similarly applied to a multiplexed frame with three antennas and three channels, a multiplexed frame with two channels out of three antennas, and a frame in which non-multiplexed frames exist. is there.
- the frame configuration is not limited to Fig. 2.
- the OFDM method has been described as an example of the communication method. It is possible to do.
- the spread spectrum communication method may be used in each carrier method of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- a transmission device that transmits a frequency of a multiplexed modulated signal and a frequency of a non-multiplexed modulated signal, and can demodulate a modulated signal of either frequency
- FIG. 9 is a diagram showing a frame configuration of a communication signal according to Embodiment 3 of the present invention.
- FIG. 9 shows an example of a frame configuration on the frequency-time axis of channel A and channel B of a base station transmission signal in frequency band fl in the present embodiment.
- the vertical axis indicates frequency
- the horizontal axis indicates time.
- 102 is an information symbol
- 103 is an estimation symbol
- 104 is a control symbol.
- the estimation symbol 103 is a pilot symbol for estimating time synchronization, frequency synchronization, and distortion due to a transmission path
- the control symbol 104 transmits information used by the terminal for control. This is a symbol for transmitting information by the information symbol 102.
- FIG. 10 is a diagram illustrating a frame configuration of a communication signal according to Embodiment 3 of the present invention.
- FIG. 10 shows an example of a frame configuration on the time axis of the frequency of channel C of a base station transmission signal in frequency band f2 in the present embodiment.
- the vertical axis indicates frequency
- the horizontal axis indicates Indicates time.
- 102 is an information thin Bol
- 103 is an estimation symbol
- 104 is a control symbol.
- the estimation symbol 103 is a pilot symbol for estimating time synchronization, frequency synchronization, and distortion due to a transmission path
- the control symbol 104 is for transmitting information used by the terminal for control. This is a symbol for transmitting information by the information symbol 102.
- the channel C signal is transmitted from one antenna different from the antennas for channel A and channel B.
- FIG. 11 is a diagram showing a frequency allocation of base station transmission signals in the present embodiment of the present embodiment.
- the horizontal axis represents power, and the horizontal axis represents frequency.
- 1001 indicates a multiplex transmission signal of channel A and channel B, and the frequency band is f1.
- 1002 indicates a multiplex transmission signal of channel C, and the frequency band is f2.
- the channel C signal is transmitted at a different frequency from channel A and channel B.
- carriers are allocated to frequencies f 1 and f 2, and frequency f 1 is allocated for transmission by the base station, and the frame configuration at that time is as shown in FIG.
- the frequency f2 is allocated for base station transmission, and the frame configuration at that time is as shown in FIG.
- frequency f1 for example, channel A and channel B are multiplexed and transmitted, and the transmission speed is high, but the transmission quality is poor.
- the frequency f2 since the channel C is transmitted and not multiplexed, the transmission speed is low, but the transmission quality is good.
- FIG. 12 is a block diagram showing an example of the configuration of the transmitting device of the base station according to the present embodiment. However, the components having the same configuration as in FIG. Numbers are attached and detailed explanations are omitted.
- the serial / parallel conversion section 1102 outputs a transmission digital signal 1101 parallel signal 1103 of channel C according to the frame configuration signal 222.
- the inverse discrete Fourier transform unit 1104 performs an inverse Fourier transform on the parallel signal 1 103 of the channel C, and outputs a signal 1105 after the inverse discrete Fourier transform to the radio unit 1106.
- the radio section 1106 converts the signal 1105 of the channel C after inverse discrete Fourier transform into a radio frequency, and outputs the transmission signal 1107 of the channel C to the power amplification section 1108. I do.
- the power amplifying section 1108 amplifies the transmission signal 1107 of channel C, and the amplified transmission signal 1109 of channel C is output from the antenna of channel C as an electric wave. You.
- the channel A serial / parallel conversion section 202 based on the channel A transmission digital signal 201 and the frame configuration signal 222, obtains information symbols, A parallel signal 203 of channel A in which a control symbol and an estimation symbol exist is generated.
- the channel B serial-to-parallel converter 2 1 based on the channel B transmission digital signal 2 1 1 and the frame configuration signal 2 2 2, uses the information symbol, A parallel signal 211 of channel B in which a control symbol and an estimation symbol are present is generated.
- the estimation symbol 103 in FIG. 9 is inserted for time synchronization and frequency offset estimation. Also, it is a symbol for performing channel estimation for separating signals of channel A and channel B.
- the channel C serial-to-parallel converter 1 102 converts the information symbol according to the channel C frame configuration shown in Fig. 10 based on the channel C transmission digital signal 1101 and frame configuration signal 222.
- a parallel signal 111 of channel C in which the control symbol and the estimation symbol exist are generated.
- the signal of channel C is transmitted at frequency f2.
- the estimation symbol 103 in FIG. 10 is inserted for time synchronization and frequency offset estimation.
- the information symbol of channel A is compared with the information symbols of channel A and channel B
- the information symbol of channel C is compared with the information symbol of channel C in the receiving apparatus. Considering this, it is suitable for transmitting information of high importance in the information symbol of channel C.
- a type of information medium is transmitted on channel C, such as transmitting video information using information symbols on channel C and transmitting high-definition video using information symbols on channel A and channel B.
- a and channel B can transmit a kind of information medium.
- the same type of information medium may be transmitted on channel C, channel A and channel B.
- the same type of information has a different compression ratio at the time of encoding, for example. It is also possible to transmit information in a hierarchical manner, such as transmitting some information as information symbols of channel C and transmitting differential information using information symbols of channel A and channel B.
- FIG. 13 is a block diagram showing a configuration of a receiving device of a terminal according to the present embodiment.
- radio section 123 converts received signal 122 of frequency band f 1 received by antenna 122 to baseband frequency, and receives received orthogonal baseband signal 122 104. Is output to the Fourier transform unit 1 205 and the synchronizing unit 1 230.
- the Fourier transform section 1205 performs a Fourier transform on the received quadrature baseband signal 1204, and converts the parallel signal 1206 into a channel distortion estimating section 1207, a channel distortion estimation.
- the signals are output to the unit 122, the signal processing unit 1221, and the frequency offset estimating unit 122.
- the channel distortion estimator 1207 estimates the channel A channel distortion from the estimation symbols of the parallel signal 1206, and converts the channel A channel distortion parallel signal 1208 into the signal processor 1 2 2 Output to 1.
- the channel distortion estimator 1 209 estimates the channel B channel distortion from the estimation symbols of the parallel signal 1 206, and converts the channel B channel distortion parallel signal 1 210 into the signal processor 1 2. 2 Output to 1.
- Radio section 1 2 1 3 converts received signal 1 2 1 2 of frequency band f 1 received by antenna 1 2 1 1 into baseband frequency, and transforms received orthogonal baseband signal 1 2 1 4 into Fourier transform section 1 2 Output to 15 and synchronizer 1 230.
- the Fourier transform unit 1 2 15 performs Fourier transform on the received orthogonal baseband signal 1 2 1 4, and converts the converted parallel signal 1 2 1 6 into a transmission line distortion estimating unit 1 2 1 7 and a transmission line distortion estimating unit 1 2 19, a signal processing unit 1221, and a frequency offset estimating unit 122228.
- the channel distortion estimating unit 1 2 17 estimates the channel A channel distortion from the estimation symbol of the parallel signal 1 2 16 and converts the channel A channel distortion parallel signal 1 2 18 into the signal processing unit 1 2 2 Output to 1.
- the channel distortion estimator 1 2 19 estimates the channel B channel distortion from the estimation symbols of the parallel signal 1 2 16, and converts the channel B channel distortion parallel signal 122 0 into a signal processor 1 2 2 Output to 1.
- the signal processing unit 1 2 2 1 generates the parallel signal 1 based on the channel A transmission line distortion parallel signal 1 2 0 8 and 1 2 1 8 and the channel B transmission line distortion parallel signal 1 2 1 0 and 1 2 2 0. Separate 206 and 1216 into channel A and channel B signals. Then, the signal processing unit 1 2 2 1 outputs the parallel signal 1 2 2 2 of channel A among the separated signals to the demodulation unit 1 2 2 4, and outputs the parallel signal of channel B 1 2 2 3 Is output to the demodulation units 1 2 2 6.
- the demodulation unit 12224 demodulates the channel A parallel signal 1222 and outputs the received digital signal 12225.
- the demodulation section 1 2 2 6 demodulates the parallel signal 1 2 2 3 of channel B and outputs the received digital signal 1 2 7.
- the frequency offset estimating section 1 228 estimates the frequency offset amount from the parallel signals 1 206 and 1 216 and outputs a frequency offset estimation signal 122 9. Specifically, frequency offset estimating section 122 8 estimates the frequency offset amount from estimation symbol 103 in FIG. Then, the frequency offset estimating section 122 8 outputs, for example, a frequency offset estimating signal to the radio sections 123, 123, and the radio sections 120, 123 Remove signal frequency offset.
- the synchronizing unit 1 230 synchronizes the time using the received quadrature baseband signals 1 2 4 and 1 2 1 4, and converts the timing signal 1 2 3 1 into the Fourier transform unit 1 205 and the Fourier transform unit 1. Output to 2 1 5 For example, the synchronizing unit 123 synchronizes the time with the estimating symbol 130 of FIG.
- Radio section 1 2 3 4 converts received signal 1 2 3 3 of frequency band f 2 received by antenna 1 2 3 2 into baseband frequency, and transforms received orthogonal baseband signal 1 2 3 5 into Fourier transform section 1 2 Output to 36 and synchronization section 1 2 4 4.
- the Fourier transform unit 1 2 3 6 performs a Fourier transform on the received orthogonal baseband signal 1 2 3 5, and converts the parallel signal 1 2 3 7 into a channel distortion estimator 1 2 3 8, a demodulator 1 2 40, and a frequency offset. Output to the estimator 1 2 4 2.
- the transmission line distortion estimating unit 123 estimates the transmission line distortion from the parallel signal 123 and outputs the transmission line distortion parallel signal 123 to the demodulation unit 124.
- the demodulation unit 1240 removes the transmission line distortion from the channel signal 123 of the channel C based on the transmission line distortion parallel signal 1239, demodulates it, and receives the channel C reception signal.
- the digital signal 1 2 4 1 is output.
- Synchronizing section 123 detects detecting orthogonal baseband signal 1204 and estimating symbol 103 in FIG. 9 in received signal 1224, and the receiving apparatus synchronizes with the transmitting apparatus in time.
- the frequency offset estimating unit 122 8 estimates the frequency offset from the estimation symbol 103 of FIG. 9 in the parallel signals 122 and 126.
- the signal processing unit 1221 separates the multiplexed signal into a channel A signal and a channel B signal.
- the synchronizing unit 1244 obtains time synchronization from the estimation symbol shown in Fig. 10 of the received orthogonal baseband signal 1235.
- the frequency offset estimating unit 1242 estimates the frequency offset from the estimation symbol shown in FIG.
- the transmission line distortion estimating unit 123 estimates the transmission line distortion from the estimation symbol shown in FIG.
- the channel C demodulation section 124 0 receives the transmission path distortion parallel signal 123 as an input and demodulates the information symbol of the parallel signal 123 of FIG.
- the reception digital signals 122 5 and 122 7 obtained from channel A and channel B have lower quality than the reception digital signal 122 41 of channel C, but can be transmitted at high speed. Considering this, it is suitable for the transmission of important information and the transmission of control information in the received digital signal 1241 of channel C.
- the received digital signals 122 5 and 122 7 obtained from channel A and channel B are input to a decoder X (not shown) and decoded.
- the received digital signal 1 241 of the channel C is input to a decoder Y (not shown) and decoded.
- different information X, Y can be obtained from different decoders X, Y.
- the decoders X and Y can transmit information with the same information but different compression ratios.
- the image is transmitted by the received digital signal 1 2 4 1 of channel C, and the difference information for the high definition image is transmitted by the received digital signals 1 2 5 and 1 2 7 obtained from channels A and B.
- Hierarchical transmission can be performed.
- the transmitting apparatus and the receiving apparatus of the present embodiment there are a frequency for transmitting a plurality of modulated signals from a plurality of antennas and a frequency for transmitting a modulated signal from one antenna.
- a frequency for transmitting a plurality of modulated signals from a plurality of antennas By transmitting important information as a modulated signal transmitted from one antenna, the data quality can be ensured at the receiver.
- different information is transmitted at a frequency for transmitting a plurality of modulated signals from a plurality of antennas and at a frequency for transmitting a modulated signal from one antenna.
- information with different quality and transmission speed can be transmitted.
- FIG. 9 has been described using a multiplex frame with two channels, the present invention is not limited to this.
- FIG. 11 the description has been made using two frequency bands, but this is not the case. That is, for example, there are three frequency bands, and frequencies may be assigned for three-channel multiplex transmission, two-channel multiplex transmission, and one channel transmission.
- the transmitting device may include two or more antennas for transmitting two channels.
- the transmitting device includes a plurality of antennas for three-channel multiplex transmission, A plurality of antennas may be provided for two-channel multiplex transmission, and a plurality of antennas may be provided for one-channel transmission.
- Figure 1 The same applies to the third receiving device.
- the OFDM scheme has been described as an example of the communication scheme.
- a multicarrier scheme can be similarly implemented.
- a spread spectrum communication system may be used in the system of each carrier of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM (OFDM-CDM: Orthogonal Frequency Division Multiplex Code Division Multiplex).
- one antenna may constitute one antenna by a plurality of antennas.
- Embodiment 4 of the present invention when the base station communicates with a plurality of terminals, the frequency of the multiplexed modulated signal and the frequency of the unmultiplexed modulated signal are prepared in the transmission frame of the base station, and On the other hand, a communication method for transmitting a modulated signal at either frequency, and a transmitting device and a receiving device will be described.
- FIG. 14 is a diagram showing an example of a configuration of a receiving device of a terminal according to Embodiment 4 of the present invention.
- the components having the same configuration as in FIG. 13 are assigned the same reference numerals as those in FIG. 13, and the receiving device in FIG. 14 includes a radio wave propagation environment estimating unit 1301 and a radio wave propagation environment estimating unit 1303. It differs from the receiving apparatus of FIG. 13 in that the receiving apparatus estimates the propagation environment as information for allocating frequencies in the base station as allocation information.
- Radio wave propagation environment estimating section 1301 estimates the radio wave propagation environment of each of the received signals received by antenna 1201 and antenna 1211, from parallel signals 1206 and 1216, and outputs radio wave propagation environment estimation information 1302.
- the radio wave propagation environment estimating unit 1303 estimates the radio wave propagation environment of the received signal received by the antenna 1232 from the parallel signal 1237, and outputs it as radio wave propagation environment estimation information 1304.
- FIG. 15 is a diagram illustrating an example of a configuration of a transmission device of a base station according to the present embodiment. However, components having the same configuration as in FIG. 6 are denoted by the same reference numerals as in FIG. 6, and detailed description is omitted.
- the receiving device in FIG. 15 includes an information generating unit 604, and based on the propagation environment estimated in the receiving device, performs communication with a terminal in a poor reception state on a frequency where the base station is not multiplexed. This is different from the transmitting device in Fig.
- the information generating section 604 generates a transmission digital signal 605 from the transmission digital signal 601, radio wave propagation environment information 144, 1402, and request information 603, and generates the transmission digital signal 605. 05 is output to the modulation signal generation section 606.
- the base station apparatus transmits information about the channel assignment using the control symbol 103 in FIGS. 9 and 10, and the terminal demodulates the control symbol 103 so that the terminal performs its own function. It is possible to know where information is allocated in the frame.
- the radio wave propagation environment estimating unit 1301 receives the parallel signals 1206 and 1216 as inputs. For example, from the estimation symbol 103 in FIG. Estimate the electric field strength, multipath environment, Doppler frequency, arrival direction, channel fluctuation, jammer strength, polarization state, and delay profile of the received signal and the signal received by antenna 1 2 1 1.
- the radio wave propagation environment estimating unit 13 0 3 calculates the electric field strength of the signal received by the antenna 1 2 3 2, the multipath environment, the Doppler frequency, and the arrival direction from the parallel signal 1 2 3 7 estimation symbol , Channel fluctuation, jammer strength, polarization state, delay profile.
- the transmitting device in FIG. 15 assigns unmultiplexed frequencies or multiplexes the base station. Determine whether to assign a frequency.
- Figure 14 Receiver
- the radio propagation environment estimation information estimated by the radio wave propagation environment estimating unit 13 01 is equivalent to the radio wave propagation environment estimation information 14 01 and the radio wave propagation environment estimated by the radio wave propagation environment estimating unit 13 0 3
- the estimation information 1304 corresponds to the radio wave propagation environment estimation information 1442, and is input to the information generation unit 604.
- the information generation section 604 is composed of: the information generation section 604 is composed of data 601, radio wave propagation environment information 1441, 1402, which are required by users and communication terminals, for example, transmission speed A transmission digital signal 605 is generated from required information 603 such as a modulation method and transmission quality.
- the terminal transmits a radio wave propagation environment when the terminal receives the modulated signal transmitted by the base station, and a signal including request information requested by the user or the terminal.
- the information generation unit 604 includes data 601, radio wave propagation environment information 602, and required information such as a transmission speed, a modulation method, and transmission quality required by a user or a communication terminal. , And determines and requests the communication method from the radio wave propagation environment information 1401 and 1402 and the request information 603.
- the transmission digital signal 605 contains the information of the requested communication system.
- the communication method is information of a multiplexed signal, communication at a frequency f1, or a non-multiplexed signal, power of communication at a frequency f2.
- the base station apparatus determines whether to perform communication using a multiplexed signal or frequency f1 or to transmit a signal using an unmultiplexed signal or frequency f2.
- the method determining unit 707 extracts the radio wave propagation environment information and request information included in the signal transmitted by the transmitter A of FIG. Is extracted. Then, based on the communication method information, the method determining unit 7707 transmits a signal of one channel without multiplexing the signals of the plurality of channels based on the method of frequency f 1 for transmitting the signals of the plurality of channels from the plurality of antennas. One of the methods of the frequency f2 is selected and output as the control signal 708.
- the frame configuration signal generation unit 221 in the base station transmitting apparatus of FIG. 12 is a control signal of FIG. 8 from a receiving apparatus for each terminal (for example, terminal A, terminal B, terminal C, and terminal D of FIG. 5). A frame is configured using 708 as a control signal 222, and a frame configuration signal 222 is output. As a result, the transmitting apparatus of the base station can transmit the modulated signal according to the frame configurations in FIGS. 9 and 10.
- the information symbol of channel C has better quality than the information symbol of channel A and the information symbol of channel B.
- the base station maintains information quality by transmitting information to the terminal using the information symbol of channel C, thereby stabilizing the system.
- the base station when the terminal and the base station start communication, the base station first transmits the estimation symbol 103 to the terminal as shown in the frame configuration of FIGS. Then, the terminal receives the estimation symbol 103 transmitted first, estimates the radio wave propagation environment, and transmits the radio wave propagation environment estimation information and the request information. Then, based on the radio wave propagation environment information and the request information from the terminal, the base station transmits the information using the information symbol of channel C, the information symbol of channel A and the information symbol of channel B, Select to start communication. As a result, the quality of the data can be maintained and the system becomes stable.
- the base station transmits the estimation symbol 103 to the terminal first as shown in FIGS. 9 and 10, and the terminal transmits the estimation symbol transmitted first.
- the radio wave propagation environment is estimated, the power to transmit information using the information symbol of channel C, the information symbol of channel A and the information symbol of channel B are considered in consideration of the radio wave propagation environment estimation information and request information.
- the base station from the request from the terminal, Select whether to transmit information using the information symbol C or transmit information using the information symbol of channel A and the information symbol of channel B, and start communication. As a result, the quality of the data can be maintained and the system becomes stable.
- the transmitting apparatus and the receiving apparatus of the present embodiment when the base station communicates with a plurality of terminals, multiplexing is performed in the transmission frame of the base station for communication with a terminal having a poor reception state.
- terminals can achieve both data transmission speed and transmission quality.
- FIG. 9 has been described using a multiplex frame with two channels, the present invention is not limited to this.
- two frequency bands have been described, but the present invention is not limited to this. That is, for example, there are three frequency bands, and frequencies may be allocated for three-channel multiplex transmission, two-channel multiplex transmission, and one-channel transmission.
- the configuration of the transmitting apparatus shown in FIG. 12 with two antennas transmitting two channels and one antenna transmitting one channel has been described.
- the present invention is not limited to this, and the transmitting apparatus transmits two channels. It may have two or more antennas for this purpose.
- multiple antennas are provided for three-channel multiplex transmission and two-channel multiplex transmission May be provided with a plurality of antennas, and may be provided with a plurality of antennas for one-channel transmission.
- the OFDM method has been described as an example of the communication method. However, the same method can be applied to both the multi-carrier method and the single-carrier method. Further, a spread spectrum communication method may be used as a method of each carrier of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM (OFDM-CDM: Orthogonal Frequency Division Multiplex-Code Division Multiplex).
- One antenna is composed of multiple antennas. In some cases.
- Embodiment 5 of the present invention describes a modulated signal of a time not multiplexed in a transmission frame, a transmitting apparatus for transmitting a modulated signal of a multiplexed time, and a receiving apparatus capable of demodulating a modulated signal of either time.
- FIG. 16 is a diagram illustrating an example of a frame configuration of the channel A and the channel B in the temporal frequency axis according to the present embodiment.
- the vertical axis indicates frequency
- the horizontal axis indicates time.
- 101 is a guard symbol
- 102 is an information symbol
- 103 is an estimation symbol
- 104 is a control symbol.
- the guard symbol 101 is a symbol in which no modulated signal exists
- the estimation symbol 103 is a pilot symbol for estimating time synchronization, frequency synchronization, and distortion due to a transmission path
- Reference numeral 4 denotes a symbol for transmitting information used by the terminal for control, and is a symbol for transmitting information using the information symbol 102.
- the information symbol of channel A and the information symbol of channel B are transmitted from time 3 to time 10, and only the information symbol of channel A is transmitted from time 11 to time 18.
- the serial / parallel conversion unit 202 converts the transmission digital signal 201 of channel A into an information symbol, a control symbol, and an estimation symbol according to the frame configuration signal 222, as shown in the frame configuration of channel A in Fig. 16. Configure the frame so that the symbols are present.
- the serial-to-parallel converter 2 1 2 converts the transmission digital signal 2 11 of channel B into the symbol for time / time 1 estimation according to the frame configuration signal 2 2 2 according to the frame configuration of channel B in FIG. Outputs the parallel signal 2 13 of channel B of 102, the information symbol from time 3 to 10 at time 102.
- the estimation symbol 103 is inserted for time synchronization and frequency offset estimation. It is also used for signal separation of frames in which channel A and channel B symbols are multiplexed.
- the receiver Comparing the channel A information symbols from time 11 to 18 with the channel A and channel B information symbols from time 3 to 10, the receiver shows that the channel A information symbols from time 11 to 18 are from time 3 to 1 The quality is better than channel A and channel B information symbols of 0. Considering this, it is suitable for transmitting highly important information in channel A information symbols at times 11 to 18.
- video information is transmitted using channel A information symbols at times 11 to 18, and high-definition video is transmitted using channel A and channel B information symbols at times 3 to 10.
- a kind of information medium can be transmitted with channel A information symbols of time 11 to 18, and a kind of information medium can be transmitted with channel A and channel B information symbols of time 3 to 10.
- the same type of information medium may be transmitted in transmission on channel A information symbols from time 11 to 18 and on channel A and channel B information symbols in time 3 to 10. At this time, the same type of information has, for example, a compression rate at the time of encoding.
- FIG. 17 is a diagram showing an example of the configuration of the receiving apparatus according to Embodiment 5 of the present invention.
- components having the same configuration as in FIG. 4 are denoted by the same reference numerals as in FIG. 4, and detailed description is omitted.
- the signal processing section 3 2 1 transmits the channel A transmission line distortion parallel signals 3 08, 3 18, Transmission path distortion of channel B From parallel signals 3 10 and 3 20, parallel signals of channel A 16 1 and parallel signals of channel B at the time when parallel signals 3 06 and 3 16 are multiplexed
- the signal is separated into 604, and the parallel signal 1601 is output to the demodulator 1620, and the parallel signal 1604 is output to the demodulator 1605.
- the demodulation unit 1602 demodulates the separated parallel signal 1601 of channel A and outputs the received digital signal 1603 of channel A.
- the demodulation unit 1605 demodulates the separated parallel signal 1604 of channel B and outputs the received digital signal 1606 of channel B.
- the selection unit 328 selects the parallel signal having the larger electric field strength during the time of only the signal of the channel A in FIG. 2 from the parallel signals 303 and 316, and selects the selected parallel signal. 1607 is output to the demodulation unit 1608.
- the demodulation section 1608 demodulates the selected parallel signal 1607 and outputs a channel A reception digital signal 1609.
- the synchronization unit 334 detects the estimation orthogonal symbol 103 shown in Fig. 16 in the received orthogonal baseband signal 304 and the received signal 314, and the receiver synchronizes with the transmitter. Can be.
- the frequency offset estimating unit 3332 can estimate the frequency offset from the estimation symbol 103 in FIG. 16 in the parallel signals 303 and 316.
- the signal processing unit 3 21 converts the multiplexed signal of channel A and channel B information symbols from time 3 to 10 in Fig. 16 into the signal of channel A from time 3 to 10 and the channel of time 3 to 10
- the signal is separated into B signals and output as a parallel signal 1601 of channel A and a parallel signal 164 of channel B, respectively.
- the channel A demodulation unit 1602 receives the parallel signal 1601 of channel A as input and outputs the received digital signal 1603 of channel A. Further, the demodulation section 16605 of channel B receives the parallel signal 16604 of channel B as an input and outputs the received digital signal 1606 of channel B.
- the demodulation unit 1608 of channel A receives the selected parallel signal 1607 as input, estimates transmission line distortion from the estimation symbol 103 in FIG. 16, and estimates the estimated transmission line. It demodulates the parallel signal of channel A at time 11 to 18 from the distortion and outputs the received digital signal 1609.
- the received digital signals 1603 and 1606 obtained from channel A and channel B have lower quality than the received digital signal 1609 of channel A, but can be transmitted at high speed.
- the channel A is suitable for transmission of important information and transmission of control information in the received digital signal 1606 of channel A.
- the received digital signals 1603 and 1606 obtained from channels A and B are input to a decoder X (not shown) and decoded.
- the received digital signal 1609 of channel A is input to a decoder Y (not shown) and decoded.
- different information X and Y can be obtained from different decoders X and Y, and information having the same compression rate but different compression rates can be transmitted in decoders X and Y.
- the video is transmitted by the received digital signal 1609 of channel A, and the difference information for the high-definition video is transmitted by the received digital signals 1603 and 1606 obtained from channels A and B.
- Hierarchical transmission can be performed.
- the transmitting apparatus and the receiving apparatus of the present embodiment there are frames in which a plurality of modulated signals are transmitted from a plurality of antennas and frames in which a modulated signal is transmitted from one antenna. Is transmitted as a modulated signal transmitted from one antenna, the data quality can be ensured in the receiving apparatus. Further, according to the transmitting apparatus and the receiving apparatus of the present embodiment, by transmitting different information in a frame for transmitting a plurality of modulated signals from a plurality of antennas and in a frame for transmitting a modulated signal from one antenna, quality and quality are improved. Information with different transmission speeds can be transmitted.
- FIGS. 3, 16 and 17 have been described by taking as an example a frame that is not multiplexed with a multiplexed frame having two antennas and two channels, the present invention is not limited to this.
- the same applies to the case where the number of antennas is 3 in a multiplexed frame with 3 channels, 2 out of 3 antennas in a multiplexed frame with 2 channels, and a frame in which non-multiplexed frames exist. Is possible.
- the frame configuration is not limited to FIG.
- the OFDM method has been described as an example of the communication method.
- the present invention can be similarly implemented using either the multi-carrier method or the single-carrier method.
- a spread spectrum communication method may be used in the method of each carrier of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM (OFDM-CDM: Orthogonal Frequency Division Multiplex Code Division Multiplex).
- one antenna may constitute one antenna by a plurality of antennas.
- FIG. 18 is a block diagram showing an example of a configuration of a receiving device of a terminal according to Embodiment 6 of the present invention. However, for those having the same configuration as FIG. 4 or FIG. 17, The same numbers as those in FIG. 4 or FIG. 17 are assigned, and the detailed description is omitted.
- the radio wave propagation environment estimating unit 1701 calculates the electric field strength of the received signals received by the antenna 301 and the antenna 311 from the parallel signals 306 and 316, and the multipath environment. , Doppler frequency, arrival direction, channel fluctuation, jammer strength, polarization state, and delay profile are estimated and output as radio wave propagation environment information 1702.
- the radio wave propagation environment information 1702 estimated by the radio wave propagation environment estimating section 1701 of the receiving apparatus in FIG. 18 corresponds to the radio wave propagation environment information 622 in FIG. Is input to
- the information generator 604 inputs data 601, radio wave propagation environment information 602, and required information 603 required by the user or the communication terminal, such as transmission speed, modulation method, and transmission quality. And a transmission digital signal 605 is generated. As a result, the terminal transmits a radio wave propagation environment when the terminal receives the modulated signal transmitted by the base station, and a signal including request information requested by the user and the terminal.
- the information generation unit 604 includes data 601, radio wave propagation environment information 602, information required by a user or a communication terminal, for example, required information 604 such as a transmission speed, a modulation method, and transmission quality.
- the communication method is determined and requested from the radio wave propagation environment information 602 and the request information 603, and the transmission digital signal 605 is output.
- the transmission digital signal 605 contains the information of the requested communication system.
- the communication method is information indicating whether communication is performed using a multiplexed signal or communication using a non-multiplexed signal.
- the information symbol of channel A at time 11 to 18 is compared with the information symbol of channel A and the information symbol of channel B at time 3 to 10. Good quality.
- the base station transmits data to the terminal using information symbols of channel A at times 11 to 18 to improve the data quality. By keeping it, the system will be stable.
- the base station transmits the estimation symbol 103 to the terminal first as shown in FIG. 16, and the terminal transmits the estimation symbol 103 transmitted first. And the terminal transmits the radio wave propagation environment estimation information and the request information. Then, based on the radio wave propagation environment information and the request information from the terminal, the base station transmits the information using the channel A information symbol from time 11 to 18 or the information symbol from channel 3 from time 3 to 10 Transmit information using the information symbol of and channel B, or select, and start communication. As a result, the quality of the data can be maintained and the system becomes stable.
- the base station transmits the estimation symbol 103 to the terminal first as shown in FIGS. 9 and 10, and the terminal transmits the estimation symbol transmitted first.
- 10 3 is received, the radio wave propagation environment is estimated, and the radio wave propagation environment estimation information and the request information are taken into account, and the information is transmitted using the information symbol of channel A from time 11 to 18 or time 3 Select whether to transmit information using the information symbol of channel A and the information symbol of channel B from 10 and request the base station.
- the base station Based on the request from the terminal, transmits information using the channel A information symbol at time 11 to 18 and transmits information using the channel A information symbol and channel B information symbol at time 3 to 10. Or select to start communication.
- the quality of the data can be maintained and the system becomes stable.
- multiplexing is performed in the transmission frame of the base station for communication with a terminal having poor reception status. By allocating frames that have not been transmitted and multiplexing frames for communication with terminals that have good reception conditions, terminals can achieve both data transmission speed and transmission quality.
- FIGS. 3, 16 and 18 have been described by taking as an example a frame that is not multiplexed with a multiplexed frame having two antennas and two channels, the present invention is not limited to this.
- the same can be applied to a multiplexed frame with three channels and three channels, a multiplexed frame with two channels out of three antennas, and a frame with non-multiplexed frames. is there.
- the frame configuration is not limited to FIG.
- the DMFDM method has been described as an example of the communication method, the time unit and the frequency unit can be assigned in a multicarrier manner, and the time unit can be assigned in a single carrier manner. It is possible. Further, a spread spectrum communication system may be used in each of the multicarrier systems. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- Embodiment 7 of the present invention describes a configuration method of a coded pilot symbol and a configuration of a transmission device and a reception device in a transmission method of transmitting modulated signals of a plurality of channels to the same frequency from a plurality of antennas. I do.
- FIG. 19 is a diagram showing an example of a configuration of a transmission signal frame transmitted by the base station according to Embodiment 7 of the present invention.
- the vertical axis indicates frequency
- the horizontal axis indicates time.
- the pilot symbol 1801 is arranged at a predetermined position in the frame and is regularly inserted into the channel A signal. Then, the receiving apparatus separates the signal of channel A from the signal of channel B by this pilot symbol 1801, and then estimates the frequency offset of channel A divided by the transmission path distortion, thereby obtaining information on channel A. Symbol 102 can be demodulated. At this time, no pilot symbol is inserted into the channel B signal. At this time, the receiving apparatus can demodulate the information symbol 102 of the channel B by coding the channel A or making the signal of the channel A a pilot. You.
- FIG. 20 is a block diagram showing an example of a configuration of the transmitting apparatus according to Embodiment 7 of the present invention.
- components having the same configuration as in FIG. 3 are denoted by the same reference numerals as in FIG. 3 and detailed description is omitted.
- the encoding unit 1901 encodes the transmission digital signal 211 of channel B based on the transmission digital signal 201 of channel A and serializes the encoded transmission digital signal 1902. Output to the parallel converter 2 1 2.
- the serial / parallel conversion section 212 converts the encoded transmission digital signal 1902 into parallel data arranged according to the frame configuration signal 222, and converts the converted parallel signal 211 into an inverse discrete signal. Output to the Fourier transform unit 204. Specifically, the serial / parallel conversion unit 2 12 forms a frame with the configuration shown in FIG.
- FIG. 21 is a block diagram showing an example of a configuration of a receiving apparatus according to Embodiment 7 of the present invention.
- components having the same configuration as in FIG. 4 are denoted by the same reference numerals as in FIG. 4, and detailed description is omitted.
- Fig. 4 The demodulation unit 2003 demodulates the separated parallel signal 2001 of channel A and outputs the received digital signal 2000 of channel A.
- the demodulation unit 2000 demodulates the separated parallel signal 200 of channel B using the separated parallel signal 200 of channel A, and obtains the received digital signal 200 0 of channel B. Outputs 6.
- FIGS. 22A to 22H are diagrams showing an example of signal point arrangement on the IQ plane when the signal of channel B is differentially encoded with respect to the signal of channel A.
- Figures 22A-H show channels A and B with QPSK (QPSK: Quadrature Phase Shift Keying) modulated signals.
- Signal points for transmitting information '00' at channel A carrier 1 time 4 are arranged as shown in Fig. 22A.
- the information is transmitted as '00''01,'11''10' as shown in FIG.
- the position of the symbol received on channel A is the reference position for demodulating the symbol on channel B (in other words, the symbol position of information '00' on channel B).
- signal points for transmitting information “01” at channel A carrier 1 time 4 are arranged as shown in FIG. 22C.
- channel B carrier 10 temple 4 is differentially coded for channel A carrier 1 time 4, when transmitting information as '00' '01, '11' '10'
- the signal points are arranged as shown.
- signal points for transmitting information “1 1” at channel A carrier 1 time 4 are arranged as shown in FIG. 22E.
- channel B carrier 1 time 4 is differentially coded from channel A carrier 1 time 4, so when transmitting information as '00' '01' '1 1' '10'
- the signal points are arranged as shown.
- signal points for transmitting information “10” at channel A carrier 1 time 4 are arranged as shown in FIG. 22G.
- channel B carrier 1B interval 4 performs differential encoding on channel A carrier 1 time 4, so when transmitting information as '00' '01' '1 1' '10' Arrange signal points like H.
- FIGS. 23A to 23D are diagrams showing an example of signal point arrangement on the I-Q plane when the signal of channel B is subjected to differential coding with respect to the signal of channel A.
- channel A and channel B are signals subjected to BP SK modulation.
- Signal points for transmitting information “1” at channel A carrier 1 time 4 are allocated to 2201 as shown in FIG. 23A.
- channel B carrier 1 time 4 performs differential encoding on channel A carrier 1 time 4, so when transmitting information '0', signal points are arranged at 2202 as shown in Fig.23B, When transmitting '1', place a signal point at 2203. That is, the position of the symbol received on channel A is used as the reference position for demodulating the symbol on channel B (in other words, the symbol position of information '1' on channel B).
- the signal point for transmitting information '0' at channel A carrier 1 time 4 is allocated to 2204 as shown in Fig. 23C.
- channel B carrier 1 time 4 performs differential encoding on channel A carrier 1 time 4, so when transmitting information '0', signal points are arranged at 2206 as shown in Fig.23D.
- a signal point is arranged at 2205.
- FIG. 6 is a diagram showing an example when signal point arrangement is performed in FIG. At this time, it is assumed that the modulation schemes of channel A and channel B are different. Further, it is characterized in that the modulation method of channel A is PSK modulation.
- Signal points for transmitting information '0' at channel A carrier 1 time 4 are arranged as shown in Fig. 24A.
- channel B carrier 1 time 4 determines the signal point arrangement for information '00', '01', '11', '10' for the signal point arrangement of channel A carrier 1 time 4 .
- the signal point arrangement at that time is shown in Fig. 24B. That is, the point advanced by 45 degrees from the position of the symbol received on channel A is defined as the reference position for demodulating the symbol of channel B (in other words, the symbol position of information '00' in channel B).
- signal points for transmitting information “1” at channel A carrier 1 time 4 are arranged as shown in FIG. 24C.
- the channel B carrier 1 time 4 determines the signal point constellation for information '00', '01', '11' and '10' with respect to the signal point constellation of channel A carrier 1 time 4.
- the signal point arrangement at that time is shown in Fig. 24D.
- FIG. 11 is a diagram illustrating an example when signal points are arranged on a Q plane. 25A to 25D, it is assumed that the modulation schemes of channel A and channel B are different. Also, the modulation scheme of channel A is PSK modulation.
- Channel A carrier end 1 Signal points for transmitting information '0' at time 4 are arranged as shown in Fig. 25A.
- channel B carrier 1 time 4 is the signal for information 4 bits '0 000', ⁇ , '1 1 1 1' based on the position of the signal point received at channel A carrier 1 time 4.
- the signal point arrangement at that time is shown in Fig. 25B.
- signal points for transmitting information “1” at channel A carrier 1 time 4 are arranged as shown in FIG. 25C.
- channel B carrier 1 time 4 determines the signal point arrangement for information 4 bits '000 ⁇ ', ⁇ , '1 1 1 1' with respect to the signal point arrangement of channel A carrier 1 time 4 .
- the signal point arrangement at that time is shown in Fig. 25D.
- Figures 26A to 26D show signal points on the I-Q plane for multi-linear modulation (here, 16 QAM) of channel B based on PSK modulation (here, QPSK modulation) of channel A. It is a figure showing an example at the time. At this time' The key method is different. Also, the modulation scheme of channel A is PSK modulation.
- channel B carrier 1 time 4 When transmitting information '00' on channel A carrier 1 time 4, channel B carrier 1 time 4 has 4 information bits '0000' for signal point arrangement 2501 of channel A carrier 1 time 4. , '1 1 1 1'. The signal point arrangement at that time is shown in Fig. 26A.
- channel B carrier 1 time 4 uses information 4 bits' 0000,, ⁇ ⁇ ⁇ ⁇ for signal point arrangement 2502 of channel A carrier 1 time 4. , '1 1 1 1'.
- the signal point arrangement at that time is shown in Fig. 26B.
- channel B carrier 1 time 4 When transmitting information '1 1' on channel A carrier 1 time 4, channel B carrier 1 time 4 has 4 bits of information '0000', ⁇ ⁇ Determine the signal point arrangement for '1 1 1 1'.
- Figure 26 shows the signal point arrangement at that time. It is.
- channel B carrier 1 time 4 When transmitting information '10' on channel A carrier 1 time 4, channel B carrier 1 time 4 has 4 bits of information '0000' for signal point arrangement 2504 of channel A carrier 1 time 4. , '1 1 1 1'. The signal point arrangement at that time is shown in Fig. 26D.
- FIG. 27 is a diagram illustrating an example of a frame configuration of a base station transmission signal according to the present embodiment.
- Fig. 19 is a diagram illustrating an example of a frame configuration of a base station transmission signal according to the present embodiment.
- pilot symbol 1801 is regularly inserted in both channel A and channel B.
- estimation symbol 103 is a symbol used to separate channel A and channel B at the receiver, and pilot symbol 1801 of channel A is used to separate the signals of channel A and channel B at the receiver.
- the demodulation section of channel A performs channel A signal transmission line distortion, frequency offset, etc. This is a symbol for estimating the distortion component.
- the pilot symbol 1801 of channel B is used to separate the signal of channel A and channel B at the receiver, and then, in the demodulation section of channel B, the distortion of channel B signal such as transmission line distortion and frequency offset This is a symbol for estimating the component.
- the estimation symphony 103 for signal separation of channel A and channel B is not multiplexed in channel A and channel B.
- the feature is that the aforementioned pilot symphony 1801 is multiplexed.
- estimation symbol 103 and the pilot symbol 1801 both of which are known reference symbols (known pilots), for example.
- the estimation symbol 103 is used for performing signal processing for separating multiplexed signals of channel A and channel B.
- the pilot symbol of channel A 1801 and the channel B of pilot B are used to estimate the channel distortion, frequency offset, phase and amplitude in the I-Q plane. Use the rotosponore 1801.
- the channel A pilot symbol 1801 and the channel B pilot symbol are used to estimate the channel distortion, frequency offset, phase and amplitude in the I-Q plane. Use the mouth symbol 1801.
- a modulated signal is generated based on the frame configuration information shown in FIG. 27 included in the frame configuration signal 222 output from the frame configuration signal generation unit 222 shown in FIG.
- FIG. 28 is a diagram illustrating an example of a signal point arrangement on the IQ plane of a pilot symbol according to the present embodiment.
- reference numeral 2701 denotes a known pilot symbol, which is a signal point arrangement at a specific position.
- Reference numeral 2702 indicates a known BPSK pilot symbol, which is BPSK modulated but arranged regularly.
- FIG. 29 is a diagram illustrating an example of a frame configuration of a base station transmission signal according to the present embodiment.
- the vertical axis indicates frequency
- the horizontal axis indicates time.
- the feature is that no pilot symbols are inserted to estimate distortion such as transmission line distortion and frequency offset after channel A and channel B separation.
- the modulation scheme of channel A is PSK modulation.
- channel A is differentially encoded on the frequency axis or the time axis.
- Channel B has information bits allocated to the signal point arrangement of channel A.
- channel A is PSK-modulated and differentially encoded with, for example, a symbol next to the frequency axis or the time axis. This eliminates the need to introduce pilot symbols. Then, for example, as shown in FIGS. 22 and 23, the channel A and the channel B are differentially encoded. Or, as shown in Fig. 24, Fig. 25, and Fig. 26, the signal points of channel B are placed with reference to the signal points of channel A.
- the receiver can estimate the channel distortion, the frequency offset, and the phase in the I-Q plane from the channel A signal when demodulating the channel B signal. That is, it can be used as a pilot symbol.
- FIGS. 20 and 21 show examples of the configuration of the transmitting device and the receiving device at this time. At this time, the operation that differs from the operation of transmitting and receiving the frame in Fig. 19 is described in Fig. 2. 0, the transmission digital signal 201 of channel A is to be differentially coded, and the demodulation unit 2003 of channel A in Fig. 21 performs differential detection (delay detection). Outputs the received digital signal of A 204.
- FIG. 30 is a diagram illustrating an example of a configuration of a receiving device according to the present embodiment.
- components having the same configuration as in FIG. 4 are denoted by the same reference numerals as in FIG. 4, and detailed description is omitted.
- the demodulation unit 2903 demodulates the separated parallel signal 2901 of channel A and outputs a received digital signal 2904.
- the demodulation unit 2905 demodulates the separated parallel signal 2902 of the channel B and outputs a received digital signal 2906.
- FIG. 31 is a block diagram illustrating an example of the demodulation unit of the present embodiment. Specifically, FIG. 31 shows a configuration of a demodulation unit of channel B as an example of a configuration of a demodulation unit of channel A and channel B in the present embodiment.
- the transmission path distortion estimating unit 3002 estimates the transmission path distortion from the parallel signal 3001 of channel B, and outputs the transmission path distortion estimation signal 3003 to the information symbolic demodulation unit 3006.
- the frequency offset estimating unit 3004 estimates the frequency offset from the parallel signal 3001 of the channel B, and outputs the frequency offset estimating signal 3005 to the information symbol demodulating unit 3006.
- the information symbol demodulation unit 3006 demodulates the parallel signal 3001 of channel B using the transmission path distortion estimation signal 3003 and the frequency offset estimation signal 3005, and 0 0 7 is output.
- FIG. 32 is a block diagram illustrating an example of the demodulation unit of the present embodiment. Specifically, FIG. 32 shows a configuration of a channel B demodulation unit as an example of a configuration of a channel A and channel B demodulation unit in the present embodiment.
- the transmission line distortion estimator 3102 transmits from the parallel signal 3108 of channel A.
- the channel distortion is estimated, and the transmission line distortion estimation signal 3103 is output to the information symbol demodulation unit 3106.
- the frequency offset estimating unit 3104 estimates the frequency offset from the parallel signal 3108 of the channel A, and outputs the frequency offset estimation signal 3105 to the information symbol demodulation unit 3106.
- the information symbol demodulation unit 3106 demodulates the parallel signal 3101 of channel B using the transmission path distortion estimation signal 3103 and the frequency offset estimation signal 3105, and receives the channel B Outputs digital signal 3107.
- FIG. 33 is a block diagram illustrating an example of the demodulation unit of the present embodiment. Specifically, FIG. 33 shows a configuration of a channel B demodulation unit as an example of a configuration of a channel A and channel B demodulation unit in the present embodiment.
- the channel distortion estimating unit 3202 estimates the channel distortion from the parallel signal 3201 of channel B and the parallel signal 3208 of channel A, and estimates the channel distortion signal 3 0 2 3 is output to the information symbol demodulation unit 3206.
- the frequency offset estimator 3 204 estimates the frequency offset from the parallel signal 3201 of channel B and the parallel signal 3208 of channel A, and outputs the frequency offset estimation signal 3205 as information. Output to symbol demodulation section 320.
- the information symbol demodulation unit 3202 demodulates the parallel signal 3201 of channel B using the transmission line distortion estimation signal 3203 and the frequency offset estimation signal 3205, and receives the channel B
- the digital output signal 3207 is output.
- FIG. 34 is a block diagram illustrating an example of the demodulation unit of the present embodiment. Specifically, FIG. 34 shows a configuration of a channel B demodulation unit as an example of a configuration of a channel A and channel B demodulation unit in the present embodiment.
- FIG. 35 is a block diagram showing an example of the configuration of the receiving apparatus according to the present embodiment. However, components having the same configuration as in FIG. 4 or FIG. 30 are assigned the same reference numerals as in FIG. 4 or FIG. 30, and detailed description thereof will be omitted.
- Fig. 4 Fig. 30
- the feature of Fig. 35 is that the channel A demodulation unit 2903 receives the separated parallel signal 2901 of channel A and the separated parallel signal 2902 of channel B.
- the demodulation of channel A is performed by the separated parallel signal 2901 of channel A and the separated parallel signal 2902 of channel B.
- channel B demodulation unit 2905 receives the separated channel A parallel signal 2901 and the separated channel B parallel signal 2902,
- the feature of FIG. 35 is that the demodulation of channel B is performed by the separated parallel signal 2901 of channel A and the separated parallel signal 2902 of channel B.
- FIG. 35 an example of the configuration of the demodulation units for channel A and channel B is as shown in FIG. That is, the demodulation unit 2903 and the demodulation unit 2905 are configured by the demodulation unit in FIG.
- the demodulation unit 2903 of channel A will be described as an example.
- the transmission path distortion estimator 3 202 is a parallel signal 3221 of channel A corresponding to the parallel signal 290 01 of the separated channel A of FIG. 35, and a separated channel B of FIG. 35.
- the parallel signal of channel B corresponding to the parallel signal 290 2 of the channel 3 2 0 8
- the pilot symbols inserted into the channels A and B are extracted from Fig. 27, the transmission line distortion is estimated, and the transmission line
- the distortion estimation signal 3203 is output to the information symbol demodulation section 3206.
- the frequency offset estimator 3 204 generates the parallel signal 3201 of channel A corresponding to the parallel signal 2901 of the separated channel A of FIG. 35, and the separated channel of FIG.
- the parallel signal of channel B equivalent to the parallel signal of B of B2902 is inserted into channel A and channel B from Fig.27.
- a pilot symbol is extracted, a frequency offset is estimated, and a frequency offset estimation signal 322 is output to an information symbol demodulation section 322.
- the information symbol demodulation unit 3202 uses the channel distortion estimation signal 3202 and the frequency offset estimation signal 3202 to perform frequency offset and transmission from the parallel signal 3221 of channel A. It removes distortion such as path distortion, demodulates it, and outputs the channel A received digital signal 3007.
- the estimation accuracy is improved and the reception sensitivity characteristics are improved.
- FIG. 36 is a block diagram illustrating an example of the demodulation unit of the present embodiment. Specifically, FIG. 36 shows a configuration of a channel B demodulation unit as an example of a configuration of a channel A and channel B demodulation unit in the present embodiment. However, components having the same configuration as in FIG. 33 are denoted by the same reference numerals as in FIG. 33, and detailed description is omitted. Fig. 3 3
- FIG. 31 is a block diagram illustrating a configuration of the receiving apparatus according to the present embodiment. Specifically, FIG. 31 is a block diagram showing a detailed configuration of the demodulation unit 203 of FIG.
- the channel distortion estimator 3 002 includes pilot symbols from a parallel signal of channel A 3 001 corresponding to the parallel signal 2 001 of the separated channel A in FIG. For example, the pilot symbol 1801, which is inserted into the channel A in FIG. 19, is extracted, and the transmission line distortion is estimated.
- the frequency offset estimator 3004 receives pilot symbols, for example, channel A in FIG.
- the pilot symbol 1 800 1 is extracted, and the frequency offset is estimated.
- the information symbol demodulation unit 3006 uses the channel distortion estimation signal 3003 and the channel distortion estimation signal 3005 to perform frequency offset and transmission from the parallel signal 3001 of channel A. Demodulate by removing distortion such as road distortion.
- the demodulation unit 2005 of channel B receives the separated parallel signal 2001 of channel A and the separated parallel signal 2002 of channel B as input, and the information of channel B in Fig. 19 Demodulate symbol 102 and output channel B received digital signal 206.
- FIGS. 34 and 36 show the detailed configuration of the demodulation unit 205 of channel B at this time.
- the information symbol demodulation unit 3303 converts the parallel signal of channel A 3302 corresponding to the parallel signal 2001 of the separated channel A of FIG. Input the parallel signal of channel B 3301, which is equivalent to the parallel signal 2002 of channel B, and perform differential detection (delay detection).
- the transmission line distortion estimating unit 3202 is a pilot symbol based on the parallel signal 3208 of channel A corresponding to the parallel signal 2001 of separated channel A in FIG. For example, for example, pilot symbol 1801 of channel A in FIG. 19 is extracted, and the channel distortion is estimated.
- the frequency offset estimator 3204 obtains a pilot symbol from the parallel signal 3208 of channel A corresponding to the separated parallel signal 2001 of channel A in FIG. Extract pilot pilot information of 9 channel A, and estimate the frequency offset.
- the information symbol demodulation section 3202 uses the transmission path distortion estimation signal 3202 and the frequency offset estimation signal 3202 to generate a parallel signal 3208 of channel A and a parallel signal of channel B. Signals such as frequency offset and transmission line distortion are removed from the signal 3201, differential detection (delay detection) of the channel B parallel signal and the channel A parallel signal is performed, and the channel B received digital signal 3207 is detected. output I do.
- the signal of channel B is differentially coded by the signal of channel A, and no pilot symbol is inserted in channel B. This has the effect of improving the transmission speed compared to a system in which a pit symbol is inserted.
- the method of differential encoding of channel A and channel B is not limited to this.
- only a specific symbol may be differentially encoded.
- the symbols to be differentially encoded on channel A and channel B need not be the same carrier and the same time symbol.
- the powers described in BPSK and QPSK are not limited to those described above, and are particularly easy to implement in the case of PSK modulation.
- FIGS. 32 and 36 the configuration including the transmission path distortion estimating unit and the frequency offset estimating unit has been described, but the same configuration can be implemented with a configuration including only one of them.
- the transmitting device and the receiving device are not limited to the configurations shown in FIGS. 20 and 21, and will be described by taking as an example a frame that is not multiplexed with a multiplexed frame having two antennas and two channels. However, it is not limited to this.
- the present invention can be similarly implemented in a multiplexed frame with three antennas and three channels and a multiplexed frame with two channels out of three antennas. At this time, when three channels are multiplexed, if the channel to be added is channel C, channel C is differentially coded with channel A.
- the frame configuration is not limited to Fig. 19.
- the OFDM method has been described as an example of the communication method.
- a multicarrier method, a spread spectrum communication method, and a single carrier method can be similarly implemented.
- each carrier of multi-carrier In the rear system a spread spectrum communication system may be used. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- channel ⁇ is coded based on the signal of channel ⁇ .
- channel A and channel B are not limited to this, and for example, only a specific symbol may be coded. Also, the symbols to be encoded on channel A and channel B need not be the same carrier and the same time symbol. Also, as an example of coding, channel A has been described using BPSK: and QPSK. However, the present invention is not limited to this, and it is easy to implement, especially in the case of PSK modulation. Also, it is necessary to always transmit the reference channel for encoding. It is suitable for transmitting control information, such as communication status and channel configuration information, to the channel.
- FIG. 36 the configuration including the transmission line distortion estimating unit and the frequency offset estimating unit has been described. However, a configuration including only one of them can be similarly implemented.
- the transmitting device and the receiving device are not limited to the configurations shown in FIGS. 20 and 21, and will be described by taking as an example a frame that is not multiplexed with a multiplexed frame having two antennas and two channels. However, it is not limited to this.
- the present invention can be similarly applied to a multiplexed frame with three antennas and three channels and a multiplexed frame with two channels out of three antennas. At this time, when three channels are multiplexed, if the channel to be added is channel C, channel C encodes channel A.
- Figure 1 shows the frame configuration. It is not limited to nine.
- the OFDM method has been described as an example of the communication method.
- a multicarrier method, a spread spectrum communication method, and a single carrier method can be similarly implemented.
- a spread spectrum communication system may be used in each carrier system of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM (Orthogonal Frequency Division Multiplex Code Division Multiplex).
- one antenna may constitute one antenna by a plurality of antennas.
- the encoding method of channel A and channel B is not limited to this, and for example, only a specific symbol may be encoded. Also, the symbols to be encoded for channel A and channel B need not be the same carrier and the same time symbol. Also, as an example of coding, channel A was described using BPSK and QPSK, but the present invention is not limited to this, and it is easy to implement, especially in the case of PSK modulation. Also, the channel used as the reference for differential encoding must be constantly transmitted. It is suitable for transmitting control information, such as communication status and channel configuration information, to the channel.
- the transmitting device and the receiving device are not limited to the configurations shown in FIGS. 20 and 21, and will be described by taking as an example a frame that is not multiplexed with a multiplexed frame having two antennas and two channels. However, it is not limited to this.
- the present invention can be similarly implemented in a multiplexed frame with three antennas and three channels and a multiplexed frame with two channels out of three antennas. At this time, when multiplexing three channels, add the additional channels. Then, channel C encodes channel A.
- the frame configuration is not limited to that shown in Fig. 29.
- the present invention can be similarly implemented using a multicarrier method, a spread spectrum communication method, or a single carrier method.
- each carrier of multi-carrier The spread spectrum communication method may be used in the method of the keyer. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- channel A is differentially coded on the frequency axis or time axis
- the signal on channel B is coded using the signal on channel A
- a pilot symbol is inserted into channels A and B.
- the transmission rate is improved as compared to a system in which pilot symbols are inserted into channels ⁇ / ⁇ and channels ⁇ ⁇ ⁇ .
- the transmitting device and the receiving device are not limited to the configurations shown in FIGS. 3 and 35.Also, an example has been described in which a multiplex frame having two antennas and two channels is not multiplexed. It is not limited to this.
- the present invention can be similarly implemented in a multiplex frame with three antennas and three channels and a multiplex frame with two channels out of three antennas. At this time, in the case of three-channel multiplexing, the estimation accuracy is further improved by estimating the frequency offset by distorting the transmission line using the pilot symbols for three channels.
- the frame configuration is not limited to that shown in Fig. 27.
- the OFDM method has been described as an example of the communication method, but the present invention can be similarly implemented using a multicarrier method, a spread spectrum communication method, or a single carrier method.
- a spread spectrum communication system may be used in each carrier system of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- channel A By estimating the frequency offset and the transmission line distortion using the pilot of channel B, the estimation accuracy is improved. As a result, the reception sensitivity of demodulation of channel A and channel B is improved.
- one frequency source for a transmission baseband and one frequency source for a radio unit are used.
- a description will be given of a transmitting device provided with the radio communication device and a receiving device provided with one frequency source for the reception baseband and one frequency source for the radio section.
- FIG. 37 is a block diagram showing an example of the configuration of the transmitting apparatus according to Embodiment 8 of the present invention. However, components having the same configuration as in FIG. 3 are assigned the same reference numerals as those in FIG. 3 and detailed description is omitted.
- the frequency source 3601 generates an operating frequency signal 3602 for a transmission baseband signal, and converts the operating frequency signal 3602 into a serial / parallel converter 202 and an inverse discrete Fourier converter 202. , A serial-parallel converter 2 12, an inverse discrete Fourier converter 2 14, and a frame configuration signal generator 2 21.
- the frequency source 366 3 generates an operating frequency signal 364 for the radio section, and outputs the operating frequency signal 364 to the radio section 206 and the radio section 2 16.
- the transmission spanned frequency source 3601 generates an operating frequency signal 3602.
- the serial / parallel converters 202 and 212 and the discrete Fourier converters 204 and 214 perform signal processing in synchronization with the operating frequency signal 3602.
- the radio frequency source 3603 generates the operating frequency signal 3654.
- the radio units 206 and 216 perform frequency conversion of the signals 205 and 215 after the discrete Fourier transform in synchronization with the operating frequency signal 3604, and transmit signals 207 and 2 1 7 is output.
- the transmitting apparatus of the present embodiment it is possible to reduce the number of frequency sources as compared with a case in which a frequency source is individually owned for each antenna.
- frequency synchronization and time synchronization of the channel A signal and the channel B signal in the receiving apparatus can be easily performed. Because the frequency source is shared between channel A and channel B, there is no need to synchronize them separately.
- FIG. 38 is a block diagram showing an example of a configuration of a receiving apparatus according to Embodiment 8 of the present invention.
- components having the same configuration as in FIG. 4 are denoted by the same reference numerals as in FIG. 4, and detailed description is omitted.
- the frequency source 3701 generates an operating frequency signal 3702 for the reception baseband, and outputs the operating frequency signal 3702 to the synchronization section 3334.
- the frequency source 3703 generates an operating frequency signal 3704 for the radio section, and outputs the operating frequency signal 3704 to the radio section 303 and the radio section 313.
- the frequency source 3701 for the reception baseband generates the operating frequency signal 3702.
- the synchronizer 334 compares the operating frequency signal 3702 with the synchronization timing obtained from the received quadrature baseband signals 304 and 314, and generates a timing signal 335 synchronized with the transmitter. I do.
- the frequency source 3703 uses the frequency offset estimation signal 3333 to control the frequency so as to synchronize with the transmitting apparatus, and generates the operating frequency signal 3704.
- the radio sections 303 and 314 convert the frequency of the received signals 302 and 318 based on the operating frequency signal 3704, respectively.
- the receiving apparatus of the present embodiment it is possible to reduce the number of frequency sources as compared to a case where the frequency sources are individually owned for each antenna. Also, frequency synchronization and time synchronization between the channel A signal and the channel B signal are easy. Can be done.
- the transmitting device and the receiving device are not limited to the configurations shown in FIGS. 37 and 38.Also, the description has been given by taking as an example a frame that is not multiplexed with a multiplex frame having two antennas and two channels. However, this is not a limitation.
- the present invention can be similarly implemented in a multiplex frame with three antennas and three channels and a multiplex frame with two channels out of three antennas.
- the OFDM method has been described as an example of the communication method, but the present invention can be similarly implemented using a multicarrier method, a spread spectrum communication method, or a single carrier method.
- a spread spectrum communication method may be used in each carrier method of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- a transmitting apparatus including one frequency source for a transmission baseband and one frequency source for a radio unit , And by using a receiving device having one frequency base for the reception baseband and one frequency source for the radio unit, as compared with a case where the transmitting device has a frequency source separately for each antenna, Frequency sources can be reduced.
- Frequency sources can be reduced.
- FIG. 39 is a diagram illustrating an example of an arrangement of base stations according to Embodiment 9 of the present invention.
- base station 380 1 transmits a modulated signal at frequency f 1
- its communication limit is 380 2.
- base station 3803 transmits a modulated signal at frequency f2, and its communication limit is 3804.
- the base station 3801, which transmits the modulation signal of the frequency f1 and the base station 3803, which transmits the modulation signal of the frequency f2 are installed at almost the same place. I do.
- the base station apparatus and the communication terminal apparatus are capable of adaptively transmitting a signal of a communication method for multiplexing signals of a plurality of channels using a plurality of antennas and a signal of one channel depending on a radio wave propagation environment and a communication area.
- Base station 380 1 transmits a signal having the frame configuration shown in FIG. 9 at frequency f 1. Further, base station 380 3 transmits a signal having the frame configuration shown in FIG. 10 at frequency f 2. The frequencies f1 and f2 are arranged as shown in FIG.
- the base station 380 1 is configured as shown in FIG. 3, and it is assumed that signals of a plurality of channels are multiplexed and transmitted from a plurality of antennas.
- signals of two channels are multiplexed and transmitted from two antennas in a frame configuration as shown in FIG.
- FIG. 40 is a block diagram showing a configuration of a receiving device of a base station according to Embodiment 9 of the present invention.
- FIG. 40 illustrates an example of a configuration of a receiving device of the base station 380 1 and the base station 380 3.
- radio section 3903 converts received signal 3902 received by receiving antenna 3901 to baseband frequency, and demodulates received orthogonal baseband signal 3904 to demodulator 3900. Output to 5.
- Demodulation section 3905 demodulates received quadrature baseband signal 3904 and outputs received digital signal 3906.
- FIG. 41 is a block diagram showing a configuration of a transmitting apparatus of a base station according to Embodiment 9 of the present invention.
- Fig. 4 1 Shows an example of the configuration of the transmission device of base station 3803 in the present embodiment.
- the serial / parallel conversion unit 4002 forms a frame from the transmission digital signal 4001, and outputs the parallel signal 4003 to the inverse discrete Fourier conversion unit 4004.
- the inverse discrete Fourier transform unit 4004 performs an inverse Fourier transform on the parallel signal 4003, and outputs the signal 4005 after the inverse Fourier transform to the wireless unit 4006.
- Radio section 4006 converts signal 4005 after the inverse Fourier transform into a radio frequency, and transmission signal 4007 is output as a radio wave from antenna 410.
- FIG. 42 is a diagram illustrating an example of a configuration of a receiving device of a terminal according to Embodiment 9 of the present invention.
- components having the same configuration as in FIG. 13 or FIG. 14 are denoted by the same reference numerals as those in FIG. 13 or FIG. 14, and detailed description is omitted.
- Fig. 13 Fig. 1 Consists of a receiver for demodulating channel A and channel B at frequency f1 with two antennas, and a receiver for demodulating channel C at frequency f2. .
- the radio wave propagation environment estimating unit 13001 estimates the radio wave propagation environment of the multiplexed signal of the channel A and the channel B of the frequency f1, and outputs the radio wave propagation environment estimation signal 13302. Then, the radio wave propagation environment estimating unit 1303 estimates the radio wave propagation environment of the signal of the channel C having the frequency f2, and outputs a radio wave propagation environment estimation signal 13304.
- the communication method determining unit 4101 based on the radio wave propagation environment estimation signals 1302 and 1304, communicates with the frequency ⁇ 1, that is, the base station 3801, or the frequency f2, that is, the base station 380 Determines whether to communicate with 3 and outputs it as the determined communication method signal 4102.
- FIG. 43 is a drawing showing an example of the configuration of a transmitting apparatus of a terminal according to Embodiment 9 of the present invention.
- the transmitting device in FIG. 43 includes a modulated signal transmitting unit of frequency f1 and a modulated signal transmitting unit of frequency f2.
- the communication method selection unit 4203 receives the determined communication method signal 4202 as input, and modulates the transmission digital signal 4201 with the communication method included in the determined communication method signal 4202.
- the signal is output to the signal generator 4205 or the modulation signal generator 4221.
- the communication method selection unit 4203 converts the transmission digital signal 4201 into the modulation signal generation unit 4205 as the transmission digital signal 4204 for the frequency f1.
- Output When transmitting at the frequency f2, the communication method selection unit 4203 converts the transmission digital signal 4201 into the modulation signal generation unit 4221 as the transmission digital signal 4210 for the frequency f2. Output.
- Modulated signal generating section 4205 modulates transmission digital signal 4204 for frequency f1, and outputs transmission quadrature baseband signal 4206 to radio section 4207.
- the radio section 4207 converts the transmission orthogonal baseband signal 4206 to a radio frequency f1, and the modulated signal 42008 of the frequency f1 is output as a radio wave from the antenna 4209.
- Modulated signal generation section 4 211 modulates transmission digital signal 4 210 for frequency f 2, and outputs transmission quadrature baseband signal 4 2 12 to radio section 4 2 13.
- Radio section 4 2 13 converts transmission quadrature baseband signal 4 2 1 2 to radio frequency f 2, and modulated signal 4 2 14 at frequency f 2 is output as radio wave from antenna 4 15.
- FIG. 44 is a diagram illustrating an example of an arrangement of base stations according to Embodiment 9 of the present invention.
- components having the same configuration as in FIG. 39 are denoted by the same reference numerals as in FIG. 39, and detailed description is omitted.
- the modulated signal transmitted by the base station 3801, which transmits the modulated signal at frequency f1 can be received.
- the modulated signal at frequency f2 can be received.
- the modulated signal transmitted by the base station 380 3 transmitting the signal can be received.
- Figure 4 The radio wave propagation environment estimating section 1301 of the receiving device of the terminal 2 outputs a signal that indicates that the signal of the frequency f1 exists as the radio wave propagation environment estimating signal 1302.
- the radio wave propagation environment estimating unit 1303 outputs a signal indicating that the signal of the frequency f2 does not exist as the radio wave propagation environment estimation signal 1304. Also assume that the terminal is at point B or C. Then, the radio wave propagation environment estimating unit 1301 of the receiving device of the terminal shown in Fig. 4 outputs a signal indicating that the signal of the frequency f1 does not exist as the radio wave propagation environment estimation signal 13 0 2 Is done. Then, the radio wave propagation environment estimating unit 1303 outputs a signal indicating that the signal of the frequency f2 is present as the radio wave propagation environment estimation signal 1304.
- the communication method determining unit 4101 receives the above-mentioned radio wave propagation environment estimation signals 13 02 and 13 04 as inputs, determines that communication is to be performed at the frequency f 1 or f 2 where the modulated signal exists, and determines communication. Output as method signal 4102.
- the radio wave propagation environment estimator In 1301 a signal that indicates that a signal of frequency f1 exists is output as a radio wave propagation environment estimation signal 1302. Then, the radio wave propagation environment estimating unit 133 03 also outputs a signal indicating that the signal of the frequency f2 is present as the radio wave propagation environment estimation signal 1304.
- the communication method determination unit 4101 in FIG. 42 receives the above-described radio wave propagation environment estimation signals 13202 and 1304 as inputs, and selects, for example, a communication method with a high transmission speed, and determines the communication method. Outputs signal 4102. At this time, if the occupied frequency bands of the f1 and f2 modulated signals are equal, priority is given to the frequency f1 at which multiple antennas transmit signals of multiple channels because the communication speed is faster. Then, the communication method of the frequency f1 is selected.
- the terminal when the terminal wants to select a communication method with error resilience, it preferentially selects a communication method of frequency f2.
- the configurations of the transmitting device and the receiving device are not limited to the configurations of FIG. 3, FIG. 40, FIG. 41, FIG. 42, and FIG.
- the frame configuration of FIG. 9 a multiplex frame having two antennas and two channels has been described, but the present invention is not limited to this.
- the transmitting apparatus may transmit a multiplexed frame with three antennas and three channels.
- the OFDM method has been described as an example of the communication method, the present invention can be similarly implemented using a multicarrier method, a spread spectrum communication method, and a single carrier method.
- the communication system for transmitting signals may be the OFDM system, and the communication system for non-multiplexed signals may be the spread spectrum communication system. Further, a spread spectrum communication system may be used in each carrier system of the multicarrier. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- the communication method of transmitting signals of a plurality of channels from a plurality of antennas and the communication method of transmitting a signal of a single channel can be performed according to the environment.
- the terminal can perform communication as desired by switching the communication method to be selected depending on whether the terminal prioritizes transmission speed or error resilience.
- a radio communication apparatus having a function of receiving a plurality of antennas and having a function of transmitting a plurality of channels, receiving information on the number of antennas provided from a communication partner, includes: A communication method for transmitting a modulated signal of the number of channels corresponding to information will be described.
- FIG. 45 shows an example of a frame configuration of a base station according to Embodiment 10 of the present invention.
- FIG. However, components having the same configuration as in FIG. 2 are denoted by the same reference numerals as in FIG. 2, and detailed description is omitted.
- 4401 is a guard symbol, and no modulation symbol exists. Then, in FIG. 45, modulated signals of one to three channels are transmitted.
- FIG. 46 is a diagram showing an example of a frame configuration of the base station according to Embodiment 10 of the present invention. However, components having the same configuration as in FIG. 2 or FIG. 45 will be assigned the same reference numerals as in FIG. 2 or FIG. 45, and detailed description will be omitted. In FIG. 46, modulated signals of one or two channels are transmitted.
- FIG. 47 is a diagram illustrating an example of a configuration of a transmission device of a base station according to Embodiment 10 of the present invention.
- modulated signal generation section 460 2 modulates transmission digital signal 460 1 of channel A to form a frame indicated by frame configuration signal 466 19, and generates frame configuration signal 460 A modulated signal 4603 having a frame structure corresponding to 19 is output to the radio section 4604.
- Radio section 460 4 converts modulated signal 4603 to a radio frequency, and transmission signal 4605 is output as a radio wave from antenna 4606.
- the modulation signal generation unit 460 8 modulates the transmission digital signal 460 7 of channel B, forms a frame indicated by the frame configuration signal 466 19, and generates a frame corresponding to the frame configuration signal 461 9
- the modulated signal 469 of the configuration is output to the radio section 460.
- the radio section 460 converts the modulated signal 469 into a radio frequency, and the transmission signal 461 is output as a radio wave from the antenna 412.
- Modulation signal generation section 4 6 14 modulates transmission digital signal 4 6 13 of channel C, forms a frame indicated by frame configuration signal 4 6 19, and generates a frame corresponding to frame configuration signal 4 6 2 1
- the modulated signal 4615 of the configuration is output to the radio section 4616.
- the radio section 4 6 16 converts the modulated signal 4 6 1 5 into radio frequency and transmits the transmitted signal 4 6 17 is outputted as a radio wave from the antenna 4 6 18.
- modulated signals of three channels are multiplexed on the same frequency and transmitted.
- FIG. 48 is a diagram illustrating an example of a configuration of a receiving device of a base station according to Embodiment 10 of the present invention.
- components having the same configuration as in FIG. 40 are assigned the same reference numerals as in FIG. 40, and detailed descriptions thereof will be omitted.
- the data separation unit 4701 separates the received digital signal 3906 into reception data, antenna information, and radio wave propagation environment estimation information, outputs the reception data 4702, and outputs an antenna information signal 4770. 3.
- the radio wave propagation environment estimation signal 4704 is output to the frame configuration determination section 4705.
- the frame configuration determining unit 4705 determines the frame configuration from the antenna information signal 4703 and the radio wave propagation environment estimation signal 4704 and outputs the frame configuration signal 4706.
- FIG. 49 is a diagram illustrating an example of a configuration of a receiving device of a terminal according to Embodiment 10 of the present invention.
- the radio section 4803 converts the received signal 4802 received by the antenna 4801 into a baseband frequency, and transforms the received orthogonal baseband signal 4804 into transmission path distortion.
- the transmission path distortion estimating section 480 5 outputs the channel A transmission path distortion estimating signal 480 6 from the received quadrature baseband signal 480 4 to the signal processing section 4831.
- the transmission path distortion estimating unit 480 7 outputs the channel B transmission path distortion estimating signal 488 from the received quadrature baseband signal 480 4 to the signal processing unit 4831.
- the transmission path distortion estimating section 480 9 outputs the transmission path distortion estimating signal 480 of channel C from the received quadrature baseband signal 480 4 to the signal processing section 4831.
- the radio section 481 13 converts the received signal 480 1 2 received by the antenna 481 1 into a base frequency, and estimates the received quadrature baseband signal 480 14 as channel distortion. Output to the section 4815, the transmission path distortion estimating section 4817, and the transmission path distortion estimating section 4819.
- the channel distortion estimator 4815 receives the received orthogonal baseband signal 4814 as input, and outputs the channel A channel distortion estimator 4816 to the signal processor 4831.
- the channel distortion estimating section 4817 receives the received orthogonal baseband signal 4814 as an input, and outputs a channel B channel distortion estimating signal 4818 to the signal processing section 4831.
- the channel distortion estimator 48 19 receives the received quadrature baseband signal 4814 as input and outputs a channel C channel distortion estimator 4820 to the signal processor 4831.
- Radio section 4823 receives received signal 4822 received by antenna 4821 as input, and outputs received orthogonal baseband signal 4824 to transmission line distortion estimation section 4825, transmission line distortion estimation section 4827, and transmission path distortion estimation section 4829.
- the channel distortion estimator 4825 receives the received quadrature baseband signal 4824 as input, and outputs a channel A channel distortion estimator 4826 to the signal processor 4831.
- the channel distortion estimation unit 4827 receives the received orthogonal baseband signal 4824 as an input, and outputs a channel B channel distortion estimation signal 4828 to the signal processing unit 4831.
- the channel distortion estimation unit 4829 receives the received quadrature baseband signal 4824 as an input, and outputs a channel C channel distortion estimation signal 4830 to the signal processing unit 4831.
- the signal processing unit 4831 includes the received quadrature baseband signals 4804, 4814, 4824, the channel distortion estimation signal 4806, 4816, 4826 for channel A, the channel distortion estimation signal 4808, 4818, 4828, for channel B.
- Channel The channel distortion estimation signal 4810, 4820, 4830 is input, an inverse matrix operation is performed, and the received quadrature baseband signal 4832 of channel A is output to the demodulator 4833.
- Output the channel B receive quadrature baseband signal 4 8 3 5 to the demodulator 4 8 36 and output the channel C receive quadrature baseband signal 4 8 3 8 to the demodulator 4 8 3 9 .
- the demodulation unit 48333 demodulates the received orthogonal baseband signal 48332 of channel A and outputs the received digital signal 4883.
- the demodulator 48336 demodulates the received orthogonal baseband signal 485 of channel B and outputs the received digital signal 48737.
- the demodulation section 48339 demodulates the received quadrature baseband signal 488 of channel C and outputs a received digital signal 480.
- the radio wave propagation environment estimator 484 1 estimates the radio wave propagation environment from the received quadrature baseband signals 480 4, 484 1, and 482 4, and outputs the radio wave propagation environment estimation signal 484 2. .
- FIG. 50 is a drawing showing an example of the configuration of a transmitting apparatus of a terminal according to Embodiment 10 of the present invention.
- the data generation unit 490 4 includes transmission data 490 1, antenna information 490 2 that is information on the number of antennas that the terminal has to receive, and a radio wave propagation environment estimation signal 490. From 3, a transmission digital signal 490 5 is generated and output to the modulation signal generation section 496.
- Modulated signal generation section 496 6 modulates transmission digital signal 495 and outputs transmission direct baseband signal 490 7 to radio section 498.
- the radio section 498 converts the transmission quadrature baseband signal 4907 into a radio frequency, and the transmission signal 4909 is output as a radio wave from the antenna 4910.
- FIG. 51 is a diagram showing an example of a frame configuration of a modulated signal transmitted by the terminal according to Embodiment 10 of the present invention.
- 5001 is an antenna information symbol
- 5002 is a radio wave propagation environment symbol
- 5003 is a data symbol.
- FIG. 52 is a diagram illustrating an example of a configuration of a receiving device of a terminal according to Embodiment 10 of the present invention.
- components having the same configuration as in FIG. 4 or FIG. 30 are denoted by the same reference numerals as in FIG. 4 or FIG. 30, and detailed description is omitted.
- a radio wave propagation environment estimating unit 5101 estimates a radio wave propagation environment from the Fourier-transformed signals 3106 and 316, and outputs a radio wave propagation environment estimation signal 5102.
- a wireless communication device having a plurality of antennas and having a function of transmitting a plurality of channels will describe a communication method of transmitting a modulated signal of a channel number corresponding to information of the number of antennas.
- FIG. 49 shows a terminal receiving device that can demodulate signals of channels A, B, and C.
- FIG. 50 shows a transmission device of a terminal, and a data generation unit 490 4 has transmission data 490 1 and has three antennas, or can receive a multiplexed signal of three channels.
- the antenna information 490 2 and the radio wave propagation environment estimation signal 490 3 are input, and a transmission digital signal 495 according to the frame configuration of FIG. 51 is output.
- the radio wave propagation environment estimation signal 4903 in FIG. 50 is equivalent to the radio wave propagation environment estimation signal 4842 in FIG.
- FIG. 52 shows a terminal receiving device that can demodulate the signals of channels A and B.
- FIG. 50 shows a transmitting device of a terminal, and a data generating unit 490 4 transmits information 490 1, which includes two antennas or information that can receive a multiplexed signal of two channels. It receives certain antenna information 4902 and the radio wave propagation environment estimation signal 4903 as input, and outputs a transmission digital signal 495 according to the frame configuration shown in FIG. At this time, the radio wave propagation environment estimation signal 4903 in FIG. 50 is equivalent to the radio wave propagation environment estimation signal 5102 in FIG. Next, the configuration of the base station will be described.
- FIG. 48 shows a receiving device of a base station.
- the data separator 470 1 receives the received digital signal as input, separates the data transmitted from the terminal in the frame configuration shown in Figure 51, and receives the received data 470 2, antenna information signal 470 3, and radio wave propagation.
- the environment estimation signal 4704 is output.
- the antenna information signal 4703 is information indicating that three antennas are provided or a multiplexed signal of three channels can be received.
- the frame configuration section 470 5 receives the antenna information signal 470 3 and the radio wave propagation environment estimation signal 470 4 as inputs, and based on the antenna information signal 470 3 and the radio wave propagation environment estimation signal 470 4 Then, the frame configuration is determined and a frame configuration signal 4706 is output. At this time, a frame configuration based on the antenna information signal 4703 that includes three antennas or that can receive a multiplex signal of three channels is as shown in FIG.
- the radio wave propagation environment estimation signal 4704 indicates that the radio wave propagation environment is good, for example, time 3, 6 , 7 and 10 are multiplexed and transmitted.
- the radio wave propagation environment is medium, two channels are multiplexed and transmitted as in times 4 and 5.
- the radio wave propagation environment is poor, transmit a signal of one channel as shown in time 8 and 9.
- the transmitting device of the base station in FIG. 47 transmits a modulated signal based on the frame configuration in FIG. 45 included in frame configuration signal 46 19.
- Fig. 48 shows the data separation unit 4701 of the base station receiver, which receives the received digital signal as input, separates the data transmitted from the terminal in the frame configuration of Fig. 51, and It outputs communication data 470, antenna information signal 470, and radio wave propagation environment estimation signal 470.
- the antenna information signal 4703 is information indicating that two antennas are provided or a multiplexed signal of two channels can be received.
- the frame configuration section 470 5 receives the antenna information signal 470 3 and the radio wave propagation environment estimation signal 470 4 as inputs, and based on the antenna information signal 470 3 and the radio wave propagation environment estimation signal 470 4 Then, the frame configuration is determined and a frame configuration signal 4706 is output.
- a frame configuration based on an antenna information signal 4703 that includes two antennas or that can receive a multiplex signal of two channels is as shown in FIG.
- the communication partner terminal can receive two channels, if the radio wave propagation environment estimation signal 4704 indicates that the radio wave propagation environment is good, for example, time 3, 4, The signals of two channels are multiplexed and transmitted as shown in 5, 7, and 10. If the radio wave propagation environment is poor, transmit one channel signal as shown at time 6, 8, 9.
- the transmitting device of the base station in FIG. 47 transmits the modulated signal based on the frame configuration in FIG. 46 included in the frame configuration signal 46 19.
- the configurations of the transmission device and the reception device are not limited to the configurations of FIGS. 47, 48, 49, 50, and 52.
- FIG. 47 a configuration in which the number of antennas is three and a maximum of three channels can be multiplexed has been described.
- the OFDM system has been described as an example of the communication system, the present invention can be similarly implemented using a multicarrier system, a spread spectrum communication system, and a single carrier system.
- a spread spectrum communication method may be used in the method of each carrier of the multicarrier. Therefore, it is possible to implement the same in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- a wireless communication apparatus having a function of receiving information on the number of antennas provided from a communication partner and having a plurality of antennas and transmitting a plurality of channels is provided.
- the communication device adopts a communication method of transmitting a modulated signal of the number of channels corresponding to the information of the number of antennas.
- Embodiment 11 of the present invention in a communication method for transmitting modulated signals of a plurality of channels from a plurality of antennas, the first channel is used as a pilot channel, and the modulation method of the pilot channel is a radio propagation environment.
- This section describes a communication method that is changed by any of the PSK modulation schemes, and that the modulation scheme other than the first channel is changed to one of the modulation schemes depending on the radio wave propagation environment.
- FIG. 3 Using FIG. 3, FIG. 19, FIG. 27, FIG. 29, FIG. 48, FIG. 50, and FIG. 52, in the communication method of transmitting modulated signals of a plurality of channels from a plurality of antennas, The channel is used as a pilot channel. The communication method changed to is described.
- the configuration of the terminal's receiver is shown in Fig. 52.
- the radio wave propagation environment estimator 511 estimates the radio wave propagation environment from the Fourier-transformed signals 30 6 and 3 16 and estimates the radio wave propagation environment. Output a signal.
- the configuration of the transmitting device of the terminal is as shown in Fig. 50.
- Data generator 4904 receives transmission data 4901, antenna information 4920, and radio wave propagation environment estimation signal 4903 as inputs.
- a transmission digital signal 495 according to the frame configuration shown in FIG. 51 is formed and output.
- the radio wave propagation environment estimation signal 4903 corresponds to the radio wave propagation environment estimation signal 5102 in FIG.
- the configuration of the receiving device of the base station is as shown in FIG. 48, and the data separation section 4701 converts the received digital signal 3906 into the received data 4702,
- the antenna information signal 4703 and the radio wave propagation environment estimation signal 4704 are separated and output.
- the frame configuration determination unit 4706 receives the antenna information signal 4703 and the radio wave propagation environment estimation signal 4704, and changes the modulation method according to, for example, the radio wave propagation environment estimation signal 4704. I do.
- channel A is a pilot channel
- the modulation scheme is changed only for channel B. This is because when demodulating channel B, it is better to fix the modulation method of channel A because demodulation is based on the signal of channel A.
- the modulation scheme to be changed for channel B is not limited, but the modulation scheme to be changed for channel A is limited to PSK modulation only. This is because PSK modulation can demodulate channel B because there is no amplitude fluctuation.
- communication control can be accurately performed by transmitting important information for performing communication control by PSK modulation of channel A.
- PSK modulation may be performed only on channel A
- data may be transmitted via channel B
- the modulation scheme may be changed to achieve both transmission speed and transmission quality.
- the configurations of the transmitting device and the receiving device are not limited to the configurations of FIGS. 3, 48, 50, and 52.
- the frame configurations of FIGS. 19, 27 and 29 a multiplex frame with two antennas and two channels has been described, but the present invention is not limited to this.
- the transmitting apparatus may transmit a multiplexed frame with three antennas and three channels.
- the communication system can be similarly implemented using the power S described in the example of the OFDM system, the multicarrier system, the spread spectrum communication system, and the single carrier system.
- each carrier of the multicarrier can be used.
- a spread spectrum communication method may be used. Therefore, the present invention can be similarly implemented in OFDM-CDM.
- one antenna may constitute one antenna by a plurality of antennas.
- the transmitting apparatus and the receiving apparatus of the present embodiment in a communication method for transmitting modulated signals of a plurality of channels from a plurality of antennas, the first channel is used as a pilot channel,
- the modulation method is changed by any PSK modulation method depending on the radio wave propagation environment, and the modulation method other than the first channel is changed to any modulation method by the radio wave propagation environment, etc.
- By changing the modulation method according to the propagation environment it is possible to achieve both data transmission speed and transmission quality.
- Embodiment 12 of the present invention a method for selecting an antenna to be used for transmission based on radio wave propagation environment estimation information from a communication partner, and a communication partner based on radio wave propagation environment information from the communication partner The following describes how to determine the antenna used for reception and notify the communication partner.
- FIG. 53 is a block diagram showing an example of a frame configuration of a transmission signal of a base station according to Embodiment 12 of the present invention.
- components having the same configuration as in FIG. 2 or FIG. 45 will be assigned the same reference numerals as in FIG. 2 or FIG. 45, and detailed description will be omitted.
- FIG. 54 is a diagram showing an example of a configuration of a receiving device of a terminal according to Embodiment 12 of the present invention.
- components having the same configuration as in FIG. 49 are assigned the same reference numerals as in FIG. 49, and detailed description is omitted.
- the transmission path distortion estimator 5301 uses the received quadrature baseband signal 4804, estimates the transmission path distortion of the transmission signal transmitted from the transmission antenna 1, and outputs the transmission path distortion estimation signal of the transmission antenna 1.
- 530 2 is output to the radio wave propagation environment estimating section 4 8 4 1.
- the transmission path distortion estimating section 5303 uses the received quadrature baseband signal 4804 to estimate the transmission path distortion of the transmission signal transmitted from the transmission antenna 2, and obtains the transmission path distortion estimation signal of the transmission antenna 2.
- 530 4 is output to the radio wave propagation environment estimating section 484 1.
- the transmission path distortion estimating section 5305 estimates the transmission path distortion of the transmission signal transmitted from the transmission antenna 3 using the reception quadrature baseband signal 4804 and obtains the transmission path distortion estimation signal of the transmission antenna 3 5306 is output to the radio wave propagation environment estimating section 4841.
- the transmission path distortion estimating section 5307 estimates the transmission path distortion of the transmission signal transmitted from the transmission antenna 1 using the reception quadrature baseband signal 4811, and outputs the transmission path distortion estimation signal of the transmission antenna 1. 5308 is output to the radio wave propagation environment estimating section 4841.
- the transmission path distortion estimating section 5309 estimates the transmission path distortion of the transmission signal transmitted from the transmission antenna 2 using the reception quadrature baseband signal 4 8 14, and obtains the transmission path distortion estimation signal of the transmission antenna 2 5310 is output to the radio wave propagation environment estimating section 4841.
- the transmission path distortion estimating section 5 3 11 1 estimates the transmission path distortion of the transmission signal transmitted from the transmission antenna 3 using the reception orthogonal baseband signal 4 8 1 4, and obtains the transmission path distortion estimation signal of the transmission antenna 3 5 3 1 2 is output to radio wave propagation environment estimating section 4 8 4 1.
- the transmission path distortion estimator 5 3 13 uses the received orthogonal baseband signal 4 8 2 4 to estimate the transmission path distortion of the transmission signal transmitted from the transmission antenna 1, and obtains the transmission path distortion estimation signal of the transmission antenna 1.
- 5 3 1 4 is output to the radio wave propagation environment estimating section 4 8 4 1.
- the transmission path distortion estimator 5 3 15 uses the received orthogonal baseband signal 4 8 2 4 to estimate the transmission path distortion of the transmission signal transmitted from the transmission antenna 2, and obtains the transmission path distortion estimation signal of the transmission antenna 2.
- 5 3 16 is output to the radio wave propagation environment estimation unit 4 8 4 1.
- the transmission path distortion estimator 5 3 17 uses the received orthogonal baseband signal 4 8 2 4 to estimate the transmission path distortion of the transmission signal transmitted from the transmission antenna 3, and obtains the transmission path distortion estimation signal of the transmission antenna 3.
- 5 3 18 is output to the radio wave propagation environment estimation unit 4 8 4 1.
- the radio wave propagation environment estimating unit 4 8 4 1 outputs the transmission line distortion estimation signal of the transmitting antenna 1 5 3 0 2, 5 3 0 8, 5 3 1 4, the transmission line distortion estimation signal of the transmitting antenna 2 5 3 0 4 5 3 10, 5 3 1 6, Estimation of the radio wave propagation environment from the transmission line distortion estimation signal of the transmission antenna 3 5 3 0 6, 5 3 1 2, 5 3 18 8, radio wave propagation environment estimation information signal 4 8 4 2 Output as
- the antenna selection section 5 3 19 receives the received quadrature baseband signals 4804, 4814, 4824, selects the input from the antenna used for demodulation, and selects the antenna selection signal 5 3 2 Output as 0.
- FIG. 55 is a diagram illustrating an example of a configuration of a transmitting apparatus of a terminal according to Embodiment 11 of the present invention.
- components having the same configuration as in FIG. 50 are denoted by the same reference numerals as in FIG. 50, and detailed description is omitted.
- FIG. 56 is a diagram illustrating an example of a frame configuration of a modulated signal transmitted by the terminal according to the present embodiment.
- 550 1 is a transmission path distortion estimation symbol from the transmission antenna 1
- 550 2 is a transmission path distortion estimation symbol from the transmission antenna 2
- 550 3 is a transmission path from the transmission antenna 3.
- the distortion estimation symbol 5504 is a data symbol.
- FIG. 57 is a diagram illustrating an example of a configuration of a transmission device of the base station according to the embodiment of the present invention. However, components having the same configuration as in FIG. 47 are assigned the same reference numerals as in FIG. 47, and detailed description is omitted. 5602 is antenna information used by the terminal for reception.
- the antenna selection unit 5601 transmits the transmission signals 465, 461 to the antennas 460, 461, 416 Either is output as radio waves.
- FIG. 58 is a diagram illustrating an example of a configuration of a receiving device of a base station according to Embodiment 11 of the present invention.
- the used antenna determination unit 5701 receives the radio wave propagation environment estimation signal 470 as an input, and outputs a frame configuration signal 470 and antenna information 5702 used by the terminal for reception.
- FIG. 59 is a diagram illustrating an example of a configuration of a transmission device of a base station according to Embodiment 11 of the present invention.
- components having the same configuration as in FIG. 47 are given the same reference numerals as those in FIG. 47, and detailed description is omitted.
- the modulated signal generator 580 4 Signal 5 8 0 1 inputs the antenna information 5 8 0 3, frame information 4 6 1 9 transmission digital signal 5 8 0 2 channel B, a terminal uses for reception, frame configuration information 4 6 1
- the transmission quadrature baseband signals 4603, 4609, and 4615 according to 9 are generated and output.
- 0 1 receives the received quadrature baseband signal 480 4 as input, and transmits the signal transmitted from the estimation symbol 103 at time 1 and 11 to the antenna 1 in Figure 47, that is, the signal transmitted from the antenna 466 Channel distortion is estimated, and the transmission path distortion estimation signal of transmitting antenna 1 5 3
- the transmission path distortion estimating section 5307 of the transmitting antenna 1 of the receiving apparatus receives the reception orthogonal baseband signal 4814 as an input, and estimates the time1 and time11 estimation symbols 103 from time1. Estimate the transmission line distortion of the signal transmitted from antenna 1 of 47, that is, antenna 466, and output the transmission line distortion estimation signal of transmission antenna 1 508.
- the transmission path distortion estimating section 5 3 13 of the transmitting antenna 1 of the receiving apparatus receives the received orthogonal baseband signal 4 8 2 4 as input, and calculates the time 1 and time 11 estimation symbols 10 3 from FIG. Estimate the channel distortion of the signal transmitted from antenna 1 of 47, that is, antenna 466, and output the channel distortion estimation signal 5 2 1 4 of transmitting antenna 1 I do.
- the channel distortion estimator 530 3 of the transmitting antenna 2 of the receiving apparatus receives the received quadrature baseband signal 480 4 as an input, and calculates the estimation symbols 10 3 at times 2 and 12 from the figure.
- the transmission path distortion of the signal transmitted from the antenna 2 of 47, that is, the antenna 4612 is estimated, and the transmission path distortion estimation signal 5304 of the transmission antenna 2 is output.
- the transmission path distortion estimating section 5309 of the transmitting antenna 2 of the receiving apparatus receives the received orthogonal baseband signal 4814 as an input, and estimates the estimation symbols 103 of the times 2 and 12 from the input signals. It estimates the channel distortion of the signal transmitted from the antenna 2 of 47, that is, the antenna 4612, and outputs the channel distortion estimation signal 5310 of the transmitting antenna 2.
- the transmission path distortion estimating unit 5 3 16 of the transmitting antenna 2 of the receiving apparatus receives the received orthogonal baseband signal 4 8 It estimates the channel distortion of the signal transmitted from antenna 9 of antenna 9, ie, antenna 4612, and outputs a transmission channel distortion estimation signal 5 3 17 of transmitting antenna 2.
- the transmission path distortion estimator 530 of the transmitting antenna 3 of the receiving apparatus receives the received orthogonal baseband signal 480 as an input, and calculates the estimation symbols 103 at times 3 and 13 from the estimation.
- the transmission path distortion of the signal transmitted from the antenna 3 of the antenna 59, that is, the antenna 4618, is estimated, and the transmission path distortion estimation signal 5305 of the transmission antenna 3 is output.
- the transmission path distortion estimating section 5 3 11 of the transmitting antenna 3 of the receiving apparatus receives the received orthogonal baseband signal 4 8 1 4 as an input, and calculates the estimation symbols 10 3 at times 3 and 13 from FIG. It estimates the channel distortion of the signal transmitted from the antenna 3 of 9, ie, the antenna 4 6 18, and outputs the channel distortion estimation signal 5 3 12 of the transmitting antenna 3.
- the transmission path distortion estimating section 5 3 17 of the transmitting antenna 3 of the receiving apparatus receives the received orthogonal baseband signal 4 8 2 4 as an input, and estimates the estimation symbols 10 3 at time 3 and 13.
- the transmission path distortion of the signal transmitted from the antenna 3 of the antenna 59, that is, the antenna 4618, is estimated, and the transmission path distortion estimation signal 5318 of the transmission antenna 3 is output.
- the radio wave propagation environment estimating section 4 8 4 1 Signal 5302, 5308, 5314, transmission line distortion estimation signal of transmission antenna 2 5 304, 5310, 5316, transmission line distortion estimation signal 5306, 5312, 5318 of transmission antenna 3 are input and output as radio wave propagation environment estimation signal 4842 You.
- FIG. 55 shows a transmission device of a terminal.
- Data generation section 4905 receives transmission data 4901 and radio wave propagation environment estimation signal 4903 as inputs, and outputs transmission digital signal 4905 according to the frame configuration in FIG.
- the radio wave propagation environment estimation signal 4901 corresponds to the radio wave propagation environment estimation signal 4842 in FIG.
- FIG. 58 shows a receiving device of a base station.
- a data separation section 4701 receives the received digital signal 4905 according to the frame configuration of FIG. 56 as input, separates it into data and a signal for estimating a radio wave propagation environment, and The radio wave propagation environment estimation signal 4704 is output.
- the used antenna determining unit 5701 receives the radio wave propagation environment estimation signal 4704 as an input, determines an antenna used by the base station to transmit the modulated signal based on the radio wave propagation environment estimation signal 4704, and outputs the antenna as a frame configuration signal 4706. I do. For example, based on the frame configuration as shown in FIG. 53 and the radio wave propagation environment estimation signal 4704, the antenna used by the terminal for reception is determined, and the antenna information 5702 used by the terminal for reception is output. .
- FIG. 59 shows an example of the configuration of the transmission device of the base station.
- Modulated signal generation section 5804 transmits channel A transmission digital signal 5801, channel B transmission digital signal 5802, and transmits antenna information used by the terminal for reception.
- frame configuration signal 4619 is input.
- antenna 1 used for reception by the terminal is transmitted at antenna 1 at time 4, and antenna 1 and antenna 2 are used at time 5 to 10.
- the transmission quadrature baseband signals 4603, 4609, and 4615 are output.
- the frame configuration signal 4619 is converted to the frame configuration signal 4706 in FIG.
- the antenna information 5803 used by the terminal for reception corresponds to the antenna information 5702 used by the terminal of FIG.
- FIG. 57 is a different configuration of the transmitting device of the base station from FIG.
- the antenna selection unit 560 1 receives the transmission signals 460 5 and 461 1 and the frame configuration signal 466 19 as inputs, and according to the frame configuration of FIG. Select whether to output with antenna 2 or antenna 3, and transmit signals 4605, 4611 are output as radio waves from antenna 1, antenna 2, or antenna 3.
- the configurations of the transmitting device and the receiving device are not limited to the configurations of FIG. 48, FIG. 54, FIG. 55, FIG. 57, and FIG.
- the transmitting apparatus can perform the same operation in a multiplex frame having four channels with four antennas and three channels with four antennas.
- the OFDM method has been described as an example of the communication method. However, the same method can be applied to a multicarrier method, a spread spectrum communication method, and a single carrier method. In the scheme, a spread spectrum communication scheme may be used. Therefore, the same can be implemented in OFDM-CDM.
- the communication between base station 1 and terminal 1 has been described as an example, the present invention can be similarly applied to base station 1 and terminal n.
- one antenna may constitute one antenna by a plurality of antennas.
- a method of selecting an antenna to be used for transmission based on radio wave propagation environment estimation information from a communication partner Based on the information, the communication partner determines the antenna to use for reception and notifies the communication partner of the antenna.
- the transmission quality of data is improved by selecting the transmitting and receiving antenna with the best multiplexed signal separation accuracy.
- Embodiment 13 of the present invention is directed to a MIMO (Multi-Input Multi-Output) system that transmits modulated signals of a plurality of channels on the same frequency from a plurality of antennas and receives and demodulates the signals on the plurality of antennas.
- MIMO Multi-Input Multi-Output
- the transmission method of the symbol is explained.
- the transmitting station transmits the channel signature vector (channel signature vector). Then, the vectorized signal is transmitted from the transmitting array antenna to the receiving station, and the receiving station transmits the signal corresponding to the channel signature vector of the transmission from the received signal of the receiving array antenna.
- a communication method that detects and demodulates a transmission signal using the channel signature vector can be realized.
- the eigenmode single vector or eigenvector (eigenmode) using the eigenvector of the channel matrix is used as the communication mode for multiplexing signals by configuring multiple channels in the communication space.
- This eigenmode is a method in which these singular vectors and eigenvectors are used as the channel signature vector described above.
- the channel matrix is a matrix having the complex channel coefficients of all or some combinations of each antenna element of the transmission array antenna and each antenna element of the reception array antenna as elements.
- the transmitting station As a method for the transmitting station to obtain the channel state information of the downlink, in TDD using the same frequency carrier for the uplink and downlink of the radio channel, due to the duality (reciprocity) of the channel, the uplink from the receiving station is used. It is possible for the transmitting station to estimate or measure channel state information.
- FDD which uses different frequency carriers for uplink and downlink, By estimating or measuring downlink channel state information at the receiving station and reporting the result to the transmitting station, the transmitting station can obtain accurate downlink CSI.
- the eigenmode has the feature that the channel capacity of the MIMO system can be maximized, especially when the wireless channel of the MIMO system can be treated as a narrow-band flat fading process.
- a guard interval 4 / is inserted to eliminate inter-symbol interference due to the manolechi path delay wave, and each OFDM subcarrier is designed to be a flat fading process. Is common. Therefore, when an OFDM signal is transmitted in a MIMO system, it is possible to transmit a plurality of signals spatially multiplexed by, for example, each subcarrier by using an eigenmode.
- the channel state information of the wireless channel is known only at the receiving station.
- BLAST As a method of transmitting a signal by spatially multiplexing the signal, which has the same purpose as that of the eigenmode, for example, BLAST is known.
- a method of sacrificing the multiplicity of a signal that is, not for increasing the capacity but for obtaining a so-called antenna space diversity effect, for example, transmission diversity using a space-time code is known.
- the eigenmode is a beam space mode in which the signal is vectorized and transmitted by the transmission array antenna, in other words, the signal is mapped to the beam space and then transmitted.
- BLAST and transmission diversity transmit the signal. It is considered to be the antenna element mode because it maps to the antenna element.
- Embodiment 13 of the present invention in the MIMO system, the demodulation pilot signal when the transmitting station transmits the modulated signal to the receiving station mainly using the eigenmode
- the transmission method described above is described, the following effects can be obtained in the same manner when another method using the antenna element mode is used.
- FIG. 60 is a diagram illustrating a configuration example of a channel multiplexing communication system using a beam spatial mode represented by an eigenmode in a MIMO system.
- a multiplexed frame generator 5901 receives a transmission data sequence as input and generates a plurality of transmission frames for mapping to a multiplexed channel.
- the transmission channel analysis section 5902 performs a plurality of transmission channel signatures to form a multiplexed channel based on channel state information which is an estimation result of a propagation channel between the transmitting station and the receiving station. Calculate the vector.
- the vector multiplexing unit 5903 multiplies each transmission frame by a different channel signature vector and combines them, and then transmits them to the receiving station from the transmission array antenna 5904.
- the receiving channel J-analysis section 5.911 separates the multiplexed transmission signal based on channel state information, which is the estimation result of the propagation channel between the transmitting station and the receiving station, in advance. Calculate the channel signature vector of multiple receptions.
- the multiplexed signal demultiplexing unit 5913 receives the received signal of the receiving array antenna 5912 as an input, and generates a plurality of received signal frames obtained by multiplying each of the channel signature vectors.
- Multi-frame combining section 5914 combines the signals mapped to the multiplexed channels to combine the received data sequence.
- symbols of one channel are transmitted at a first frequency, and symbols of a plurality of channels modulated by different modulation schemes are multiplexed and transmitted at a second frequency.
- the communication method includes receiving information on a propagation path condition estimated by a communication partner, transmitting a symbol at a first frequency to a first communication partner, and transmitting a symbol from the first communication partner.
- the symbol is now transmitted on the second frequency to the bad communication partner.
- the communication method of the present study is characterized in that symbols transmitted on the first frequency have higher importance in communication than symbols transmitted on the second frequency.
- the first data is transmitted at a first frequency, a difference between the second data and the first data is generated, and the difference is transmitted at a second frequency.
- the communication method comprises: transmitting a symbol of one channel at a first frequency at the start of communication, receiving information on a propagation path condition estimated by a communication partner, and then transmitting the first frequency and the second frequency.
- the symbol is transmitted with and.
- a known symbol is transmitted at the start of communication, and a communication partner receives information on a propagation path condition estimated using the known symbol.
- the transmitting apparatus includes: a first modulation unit that modulates a signal of a first channel to generate a first symbol; and a second modulation unit that modulates a signal of a second channel to generate a second symbol.
- the transmitting device of the present invention includes: a receiving unit that receives information on a propagation path condition estimated by a communication partner; a first transmission unit that transmits a symbol to a first communication partner from propagation path conditions of a plurality of communication partners; And determining means for deciding to transmit a symbol by the second transmitting means to a communication partner whose propagation path condition is worse than that of the first communication partner.
- the transmitting apparatus of the present invention employs a configuration in which the first transmitting means transmits a symbol having a higher importance in communication than the symbol transmitted by the second transmitting means.
- the first transmitting means transmits a symbol of a first channel at a first frequency at the start of communication, and receives information of a propagation path condition estimated by a communication partner, and then transmits the second transmission symbol.
- the means employs a configuration for transmitting a symbol on the second frequency.
- the transmitting apparatus of the present invention employs a configuration in which the first transmitting means transmits a known symbol at the start of communication, and the receiving means receives information on the propagation path condition estimated by the communication partner using the known symbol.
- a receiving apparatus includes: a first receiving unit that receives a wireless signal obtained by modulating a symbol of one channel at a first frequency; and a wireless device that multiplexes a plurality of channel symbols modulated by different modulation schemes.
- Second receiving means for receiving the signal at the second frequency, first demodulating means for demodulating the signal received on the first carrier, and second demodulating means for demodulating the signal received on the second carrier.
- separating means for separating the signal demodulated by the second demodulating means for each channel.
- the receiving apparatus of the present invention includes: estimating means for estimating a propagation path condition from a known symbol of a radio signal received by a first receiving means; and transmitting means for transmitting information on the propagation path condition estimated by the estimating means. It adopts the configuration to do.
- symbols of one channel are transmitted at a first time, and symbols of a plurality of channels modulated by different modulation schemes are multiplexed and transmitted at a second time.
- the communication method of the present invention receives information on a propagation path condition estimated by a communication partner, transmits a symbol to a first communication partner at a first time, and has a worse propagation path condition than the first communication partner.
- the symbol is sent to the communication partner at the second time.
- the communication method of the present invention is characterized in that symbols transmitted in the first time have higher importance in communication than symbols transmitted in the second time.
- the first data is transmitted at a first time
- a difference between the second data and the first data is generated, and the difference is transmitted at a second time.
- the communication method of the present invention after transmitting a symbol of one channel at a first time at the start of communication and receiving information on a propagation path condition estimated by a communication partner, the first time and the second time The symbol is transmitted with and.
- a known symbol is transmitted at the start of communication, and a communication partner receives information on a propagation path condition estimated using the known symbol.
- the transmitting apparatus of the present invention modulates a signal of a first channel to generate a first symbol, and modulates a signal of a second channel to generate a second symbol.
- the transmitting device of the present invention includes: a receiving unit that receives information on a propagation path condition estimated by a communication partner; a first transmission unit that transmits a symbol to a first communication partner from propagation path conditions of a plurality of communication partners; And determining means for deciding to transmit a symbol by the second transmitting means to a communication partner whose propagation path condition is worse than that of the first communication partner.
- the transmitting device of the present invention employs a configuration in which the first transmitting means transmits a symbol having a higher importance in communication than the symbol transmitted by the second transmitting means.
- the first transmitting means transmits a symbol of the first channel at a first time at the start of communication, and after receiving information on a propagation path condition estimated by a communication partner, performs a second transmitting.
- the means employs a configuration for transmitting the symbol at the second time.
- the transmitting apparatus of the present invention employs a configuration in which the first transmitting means transmits a known symbol at the start of communication, and the receiving means receives information on the propagation path condition estimated by the communication partner using the known symbol.
- the receiving apparatus includes: a first receiving unit that receives, at a first time, a wireless signal obtained by modulating one channel symbol; and a wireless device that multiplexes a plurality of channel symbols modulated by different modulation schemes.
- Second receiving means for receiving a signal at a second time; first demodulating means for demodulating a signal received on a first carrier; second demodulating means for demodulating a signal received on a second carrier; And a separating unit that separates the signal demodulated by the second demodulating unit for each channel.
- the receiving apparatus of the present invention includes: estimating means for estimating a propagation path condition from a known symbol of a radio signal received by a first receiving means; and transmitting means for transmitting information on the propagation path condition estimated by the estimating means. It adopts the configuration to do.
- a method of transmitting one modulated signal of a communication method by a frequency and a time, a plurality of communication methods of a communication method By multiplexing and transmitting modulated signals, the other party can transmit information of high importance by transmitting one modulated signal of the communication method, and the other party can accurately transmit information. It has the effect that it can be obtained.
- the frequency or time of the method of transmitting one modulated signal of the communication method, or multiplexing multiple modulated signals of the communication method and performing communication at the frequency or time of the transmitting method allows information to be transmitted. This has the effect that both transmission speed and transmission quality can be achieved.
- the present invention is suitable for use in a wireless communication device, a base station device, and a communication terminal device.
Abstract
Description
Claims
Priority Applications (14)
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CN038169134A CN1669257B (zh) | 2002-07-16 | 2003-07-16 | 通信方法和使用该通信方法的发送装置和接收装置 |
EP03764205.5A EP1553714B1 (en) | 2002-07-16 | 2003-07-16 | Communicating method and transmitting device |
US10/516,937 US7570626B2 (en) | 2002-07-16 | 2003-07-16 | Communication method, transmitting device using the same, and receiving device using the same |
AU2003252639A AU2003252639A1 (en) | 2002-07-16 | 2003-07-16 | Communicating method, transmitting device using the same, and receiving device using the same |
US12/417,284 US7787432B2 (en) | 2002-07-16 | 2009-04-02 | Communication method, and transmitting apparatus and receiving apparatus using that communication method |
US12/541,400 US7907587B2 (en) | 2002-07-16 | 2009-08-14 | Communication method, and transmitting apparatus and receiving apparatus using that communication method |
US12/842,398 US8023488B2 (en) | 2002-07-16 | 2010-07-23 | Communication method, and transmitting apparatus and receiving apparatus using that communication method |
US13/010,150 US8175070B2 (en) | 2002-07-16 | 2011-01-20 | Communication method, and transmitting apparatus and receiving apparatus using that communication method |
US13/010,146 US8089945B2 (en) | 2002-07-16 | 2011-01-20 | Communication method, and transmitting apparatus and receiving apparatus using that communication method |
US13/433,577 US8400996B2 (en) | 2002-07-16 | 2012-03-29 | Communication method, and transmitting apparatus and receiving apparatus using that communication method |
US13/770,199 US9083480B2 (en) | 2002-07-16 | 2013-02-19 | OFDM frame transmission method and apparatus |
US14/751,658 US9800378B2 (en) | 2002-07-16 | 2015-06-26 | OFDM frame transmission method and apparatus |
US15/713,989 US10230509B2 (en) | 2002-07-16 | 2017-09-25 | OFDM frame communication method and apparatus |
US16/285,646 US11018821B2 (en) | 2002-07-16 | 2019-02-26 | OFDM frame communication method and apparatus |
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US12/417,284 Continuation US7787432B2 (en) | 2002-07-16 | 2009-04-02 | Communication method, and transmitting apparatus and receiving apparatus using that communication method |
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