WO2005048627A1 - 送信装置及び利得制御方法 - Google Patents
送信装置及び利得制御方法 Download PDFInfo
- Publication number
- WO2005048627A1 WO2005048627A1 PCT/JP2004/016865 JP2004016865W WO2005048627A1 WO 2005048627 A1 WO2005048627 A1 WO 2005048627A1 JP 2004016865 W JP2004016865 W JP 2004016865W WO 2005048627 A1 WO2005048627 A1 WO 2005048627A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- transmission
- power level
- reception
- directional
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
Definitions
- An object of the present invention is to reduce the possibility that reception demodulation will fail in communication that transmits data with directivity and omnidirectionality, and to reduce transmission efficiency due to retransmission.
- An object of the present invention is to provide a transmission apparatus and a gain control method that can prevent the transmission apparatus. Means for solving the problem
- a transmission device includes a gain control signal generation unit that generates a gain control signal that is a signal for adjusting the gain of a reception signal of a communication partner, and transmits a directional transmission signal that is burst-transmitted.
- Gain control signal multiplexing means for time-division multiplexing the directional transmission signal and the gain control signal such that the gain control signal is transmitted a predetermined time before a frame to be transmitted, and Transmission level control for setting the transmission power level of the gain control signal so that the transmission power level is lower than the transmission power level and higher than the reception power level at the communication partner of the omnidirectional transmission signal.
- FIG. 2 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 1 of the present invention.
- FIG. 12 is a block diagram illustrating a configuration of a directional signal generation unit according to Embodiment 4 of the present invention.
- FIG. 13 is a diagram illustrating a relationship between a reception power level and a reception timing according to Embodiment 4 of the present invention.
- FIG. 16 shows a relationship between a reception power level and a reception timing according to Embodiment 5 of the present invention.
- FIG. 17 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 6 of the present invention.
- FIG. 19 shows a relationship between a reception power level and a reception timing according to Embodiment 6 of the present invention.
- Phase difference calculation section 108 detects the phase difference of each branch from the information on the combined weight input from weight calculation section 105, and outputs the phase difference to sign inversion section 109.
- RF section 114 2—114n multiplies the signal obtained by multiplying the input phase difference and the directivity transmission signal by a multiplier 112—2—112—n. And amplifies the signal to the transmission level and outputs it to each switching unit 102-2—102-n
- Spreading section 501 spreads the omnidirectional transmission signal input from modulating section 110 using a predetermined spreading code, and outputs the result to adder 113.
- the transmission power level of the directional transmission signal is changed to the reception power level of the omnidirectional transmission signal and the gain control signal on the receiving side.
- the transmission power level is controlled so that the reception power level is sufficiently higher than the reception power level.
- transmission level control section 204 outputs the directional transmission signal and the gain control signal to multipliers 112-111-112-n.
- Transmitting / receiving apparatus 700 according to Embodiment 2 differs from transmitting / receiving apparatus 300 according to Embodiment 1 shown in FIG. 4 in that despreading section 701 is added as shown in FIG.
- FIG. 8 the same components as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted.
- the gain control signal is continuously transmitted until time tl-t2.
- the present invention is not limited to this, and one or a predetermined time interval is provided. May be sent multiple times.
- the power of making the power level of the gain control signal different for each frame is not limited to this. The power may be set at any timing such as making the power level of the gain control signal different for each slot. Thus, the electric level of the gain control signal can be made different.
- transmission of the gain control signal is started two frames before the frame where transmission of the directional transmission signal is started.
- the present invention is not limited to this. Transmission of the gain control signal may be started in a frame other than two frames before the frame to be started.
- FIG. 10 is a block diagram showing a configuration of directional signal generation section 111 according to Embodiment 3 of the present invention.
- the transmitting and receiving apparatus transmits the omnidirectional reception signal # 1001 and the directional reception signal # 1002 in the next frame after the frame including the reception signal in which the reception signal is code-multiplexed.
- a reception signal in which the directional reception signal # 1003 is code-multiplexed is received.
- the received signal obtained by code-multiplexing the omnidirectional received signal # 901 and the directional received signal # 1003 is higher than the power level of the omnidirectional received signal # 1001 by the amount of the multiplexed directional received signal # 1003.
- the power level of the directional transmission signal is gradually increased until the power level of the directional transmission signal reaches a predetermined value. Since the dynamic range can be adjusted by using a directional transmission signal for transmitting data, radio resources can be used effectively.
- the received signal obtained by code-multiplexing the omnidirectional received signal # 1201 and the directional received signal # 1203 is the power of the received signal obtained by code-multiplexing the omnidirectional received signal # 1201 and the directional received signal # 1204.
- the power level will be lower than the power level. Therefore, the transmitting / receiving device on the receiving side controls the gain in accordance with the reception power level of the reception signal in which the omnidirectional reception signal # 1201 and the directional reception signal # 1203 are code-multiplexed, so that at time t2
- the dynamic range including the power level of the received signal obtained by code-multiplexing the omnidirectional received signal # 1201 and the directional received signal # 1204 can be set.
- Error correction coding section 1402 encodes the directional transmission signal and outputs it to modulation section 1403.
- the reception signal obtained by code-multiplexing the omnidirectional reception signal # 1501 and the directional reception signal # 1502 is omnidirectional reception signal # 1501 and the directional reception signal # 1501.
- the power level is lower than the power level of the received signal obtained by code-multiplexing the signal # 1504. Therefore, the transmitting / receiving apparatus on the receiving side controls the gain according to the reception power level of the reception signal in which the omnidirectional reception signal # 1501 and the directional reception signal # 1502 are code-multiplexed, so that the time tl force can be reduced.
- the dynamic range can be increased.
- Transmitting / receiving apparatus 1600 according to Embodiment 6 differs from transmitting / receiving apparatus 100 according to Embodiment 1 shown in FIG. 2 in that, as shown in FIG. A section 1601, a control signal multiplexing section 1602, and a modulation section 1603 are added.
- FIG. 17 portions having the same configuration as in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.
- Adder 113 adds the control signal and the omnidirectional transmission signal input from control signal multiplexing section 1602 to the directional transmission signal input from multiplier 112-1, thereby forming a control signal and directivity.
- the transmission signal is time-division multiplexed and output to RF section 1141.
- FIG. 19 is a diagram showing the relationship between the reception timing and the reception power level of the omnidirectional received signals # 1801, # 1802, # 1804, and the directional received signal # 1803 received by the receiving device.
- the diagram showing the change of the dynamic range by AGC over time is the same as that in FIG. 5B, and the description thereof is omitted.
- the omnidirectional transmission signal includes the information of the difference between the power level of the omnidirectional transmission signal and the power level of the directional transmission signal, Since the difference information is transmitted just before the signal transmission timing, it is possible to set the large and dynamic range before receiving the directional transmission signal, thereby enabling reception demodulation. In addition, it is possible to reduce the possibility that the transmission will fail, and to prevent the transmission efficiency from deteriorating due to retransmission.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Control Of Amplification And Gain Control (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20040818523 EP1677553A1 (en) | 2003-11-14 | 2004-11-12 | Transmission device and gain control method |
US10/579,062 US7418242B2 (en) | 2003-11-14 | 2004-11-12 | Transmission device and gain control method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-385081 | 2003-11-14 | ||
JP2003385081A JP4245459B2 (ja) | 2003-11-14 | 2003-11-14 | 送信装置及び利得制御方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005048627A1 true WO2005048627A1 (ja) | 2005-05-26 |
Family
ID=34587347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016865 WO2005048627A1 (ja) | 2003-11-14 | 2004-11-12 | 送信装置及び利得制御方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7418242B2 (ja) |
EP (1) | EP1677553A1 (ja) |
JP (1) | JP4245459B2 (ja) |
CN (1) | CN100539726C (ja) |
WO (1) | WO2005048627A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007081063A1 (en) * | 2006-01-16 | 2007-07-19 | Matsushita Electric Industrial Co., Ltd. | Transmission circuit and communication apparatus comprising the same |
EP1919104A4 (en) * | 2005-08-22 | 2015-10-07 | Nec Corp | MOBILE COMMUNICATION SYSTEM, MOBILE COMMUNICATION TERMINAL AND MOBILE COMMUNICATION METHOD |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7634290B2 (en) * | 2005-05-31 | 2009-12-15 | Vixs Systems, Inc. | Adjusting transmit power of a wireless communication device |
KR100774363B1 (ko) * | 2006-11-16 | 2007-11-08 | 한국전자통신연구원 | 이동통신시스템에서의 자동이득 제어 장치 및 그 방법 |
US20090042527A1 (en) * | 2007-06-12 | 2009-02-12 | Hmicro Inc. | Dynamic low power receiver |
US20090040107A1 (en) * | 2007-06-12 | 2009-02-12 | Hmicro, Inc. | Smart antenna subsystem |
WO2009100401A2 (en) | 2008-02-06 | 2009-08-13 | Hmicro, Inc. | Wireless communications systems using multiple radios |
KR102303749B1 (ko) * | 2014-03-14 | 2021-09-23 | 삼성전자주식회사 | 패킷을 부호화 및 복호화하는 방법 및 장치 |
WO2015137779A1 (en) | 2014-03-14 | 2015-09-17 | Samsung Electronics Co., Ltd. | Method and apparatus for encoding and decoding packet |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08288881A (ja) * | 1995-04-14 | 1996-11-01 | Hitachi Ltd | 自動利得制御方式 |
JPH1051380A (ja) * | 1996-08-06 | 1998-02-20 | Mitsubishi Electric Corp | Cdmaシステム及びその送信電力制御装置及びdbfアンテナ |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4020458B2 (ja) * | 1997-06-19 | 2007-12-12 | 三菱電機株式会社 | 無線通信システム、データ送信機及びデータ受信機 |
US6490261B1 (en) * | 1999-10-28 | 2002-12-03 | Ericsson Inc. | Overlapping slot transmission using phased arrays |
JP2003134025A (ja) | 2001-10-29 | 2003-05-09 | Nec Corp | 無線通信方法及び無線通信装置 |
-
2003
- 2003-11-14 JP JP2003385081A patent/JP4245459B2/ja not_active Expired - Fee Related
-
2004
- 2004-11-12 WO PCT/JP2004/016865 patent/WO2005048627A1/ja active Application Filing
- 2004-11-12 US US10/579,062 patent/US7418242B2/en active Active
- 2004-11-12 CN CNB2004800335442A patent/CN100539726C/zh not_active Expired - Fee Related
- 2004-11-12 EP EP20040818523 patent/EP1677553A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08288881A (ja) * | 1995-04-14 | 1996-11-01 | Hitachi Ltd | 自動利得制御方式 |
JPH1051380A (ja) * | 1996-08-06 | 1998-02-20 | Mitsubishi Electric Corp | Cdmaシステム及びその送信電力制御装置及びdbfアンテナ |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1919104A4 (en) * | 2005-08-22 | 2015-10-07 | Nec Corp | MOBILE COMMUNICATION SYSTEM, MOBILE COMMUNICATION TERMINAL AND MOBILE COMMUNICATION METHOD |
WO2007081063A1 (en) * | 2006-01-16 | 2007-07-19 | Matsushita Electric Industrial Co., Ltd. | Transmission circuit and communication apparatus comprising the same |
US7616702B2 (en) | 2006-01-16 | 2009-11-10 | Panasonic Corporation | Transmission circuit and communication apparatus comprising the same |
Also Published As
Publication number | Publication date |
---|---|
CN100539726C (zh) | 2009-09-09 |
JP4245459B2 (ja) | 2009-03-25 |
JP2005151109A (ja) | 2005-06-09 |
US7418242B2 (en) | 2008-08-26 |
EP1677553A1 (en) | 2006-07-05 |
US20060285582A1 (en) | 2006-12-21 |
CN1883218A (zh) | 2006-12-20 |
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