WO2006020169A2 - Non-simultaneous frequency diversity in radio communication systems - Google Patents
Non-simultaneous frequency diversity in radio communication systems Download PDFInfo
- Publication number
- WO2006020169A2 WO2006020169A2 PCT/US2005/025354 US2005025354W WO2006020169A2 WO 2006020169 A2 WO2006020169 A2 WO 2006020169A2 US 2005025354 W US2005025354 W US 2005025354W WO 2006020169 A2 WO2006020169 A2 WO 2006020169A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- frequency
- radio
- transmitted
- information
- Prior art date
Links
Classifications
-
- 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
-
- 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
- H04B7/12—Frequency diversity
-
- 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
-
- 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
Definitions
- This disclosure is directed to a radio communication system and, more particularly, to the use of diversity techniques to improve the performance of radio communications.
- signals propagate through communication channels that are affected by a variety of factors including: atmosphere, man-made structures, terrain, fauna, and radio interference.
- signals may be reflected, refracted, and/or diffracted, resulting in changes in amplitude, phase, and frequency.
- a signal may reach a receiver through multiple paths, undergoing different distortions along each path. With differing phases and amplitudes, the multipath signals may interfere with one another, further degrading signal quality.
- Signal attenuation caused by multipath interference or interactions with man-made and natural object is called fading. A deep fade occurs when signal power drops so low as to prevent communications.
- fading is time dependent. Because the effects of reflection, refraction, and diffraction are frequency dependent, fading also is frequency dependent.
- One solution to the problem of fading is the use of diversity techniques — transmitting duplicate information such that the probability of fading disrupting signal reception is reduced. Frequency diversity is sometimes used to reduce the likelihood of deep fade. Taking advantage of the frequency-dependent nature of fading, duplicate information is transmitted at different frequencies. As long as both frequency components are not in deep fade, communications can occur.
- Time diversity also is used to reduce the likelihood of deep fade. By transmitting duplicate information at a later time, the information is more likely to be received because channel fading likely to differ. To maximize the effectiveness of time diversity, duplicate information should be transmitted after sufficient delay such that the fading characteristics of the communications channel have sufficient time to change.
- Additional diversity techniques include path diversity and polarization diversity. By exploiting one or more diversity techniques, modern radio communication systems can significantly mitigate fading.
- a radio using non-simultaneous frequency diversity includes: an antenna, a radio frequency module coupled to the antenna such that the radio frequency module is operable to transmit or receive radio frequency signals using the antenna, and a baseband module coupled to the radio frequency module.
- the baseband module is operable to transmit or receive signals through the radio frequency module. Signals transmitted or received by the radio employ non-simultaneous frequency diversity.
- the radio includes additional antennas.
- the radio frequency module may include a local oscillator operable to generate a signal, an intermediate frequency receiver, an intermediate frequency transmitter, a receive mixer coupled to the intermediate frequency receiver and the local oscillator, and a transmit mixer coupled to the intermediate frequency transmitter and the local oscillator.
- the mixers convert signals between an intermediate frequency and a transmission frequency using the local oscillator signal.
- the radio is operable to transmit data using non-simultaneous frequency diversity by using the local oscillator to transmit data at a first frequency and by using the local oscillator to transmit data at a second frequency.
- the radio can implement non-simultaneous frequency diversity using a single receive path. Implementations may use a variety of modulation techniques including orthogonal frequency division multiplexing (OFDM).
- OFDM orthogonal frequency division multiplexing
- a second local oscillator may be used such that the radio is operable to transmit data using non-simultaneous frequency diversity by using the local oscillator to transmit data at a first frequency and by using the second local oscillator to transmit data at a second frequency.
- the radio is configured to transmit signals on a first transmission channel and to transmit signals a second transmission channel such that information is transmitted on the first transmission channel and on the second transmission channel to provide non-simultaneous frequency diversity.
- the frequency separation between the first transmission channel and the second transmission channel is at least 20 MHz.
- the information transmitted on the first transmission channel and the information transmitted on the second transmission channel may differ by a complex gain and the channels may be single frequencies or may be multiple- frequency wideband channels.
- a method for transmitting information using non- simultaneous frequency diversity includes: identifying information to be transmitted, transmitting the identified information on a first channel, and after a predetermined amount of time, transmitting the identified information on a second channel.
- identifying information to be transmitted includes identifying a block to be transmitted from a set of information to be transmitted.
- the block includes no more than the maximum amount of information that can be transmitted at one time.
- the size of the block may be based on the size of an orthogonal frequency division multiplexing (OFDM) tone.
- the identified information may be transmitted at the first or second frequencies by mixing an intermediate frequency signal with the output from a local oscillator to convert the intermediate frequency signal to the transmission frequency. The same local oscillator may be used for both.
- the predetermined amount of time between transmissions may be fixed or dynamic.
- the radio may be configured to transmit signals on the first transmission channel and to transmit signals on the second transmission channel at consecutive points in time.
- a method for receiving information transmitted using non- simultaneous frequency diversity includes receiving a first signal transmitted on a first channel; after a predetermined amount of time, receiving a second signal transmitted on a second channel; and identifying transmitted information based on the first signal and the second signal.
- the method further includes converting the first signal to an intermediate frequency using a signal from a local oscillator, and converting the second signal to an intermediate frequency using a signal from a local oscillator.
- the same local oscillator may be used to convert both the first signal and the second signal.
- the amount of time between reception of the first signal and the second signal may be fixed or dynamic.
- Implementations may include using a single receive path to receive the first signal transmitted on the first channel and to receive the second signal transmitted on a second channel.
- the first channel and the second channel may be wideband channel, and the first channel and the second channel differ by at least 20 MHz.
- the system may identify the transmitted information by combining the first signal and the second signal using selection diversity, equal gain combining, and/or maximal ratio combining.
- FIG. 1 is a diagram of a radio communication system.
- FIG. 2 is an amplitude-versus-frequency plot of a radio communication system transmission using simultaneous frequency diversity.
- FIGS. 3 A and 3B are amplitude-versus-frequency plots of radio communication system transmissions using non-simultaneous frequency diversity.
- FIG. 3C is an amplitude-frequency-time graph of a series of transmissions using non- simultaneous frequency diversity.
- FIG. 4 A is an amplitude-versus-frequency plot of a radio communication system transmission using orthogonal frequency division multiplexing (OFDM).
- FIG. 4B is a block diagram of OFDM transmissions at various points in time illustrating non-simultaneous frequency diversity.
- FIG. 5 A is a block diagram of a radio using non-simultaneous frequency diversity.
- FIG. 5B is a block diagram of the radio frequency (RF) stage of a radio using non- simultaneous frequency diversity.
- FIG. 6A is a flow chart of a method of transmitting information using non- simultaneous frequency diversity.
- FIG. 6B is a flow chart of a method of receiving information transmitted using non- simultaneous frequency diversity.
- a radio communication system 100 comprises a base station 102 operable to communicate with one or more remote stations 104.
- the base station 102 is coupled to a network 106 such that the base station 102 can transfer information between the network 106 and the remote stations 104.
- the radio communication system 100 may be used to provide wireless services, such as, for example, wireless metropolitan area networks, wireless local area networks, wireless video-on-demand, and/or wireless voice services.
- the radio communication system 100 may be used to implement a wireless local area network (WLAN) based on the IEEE 802.1 1 standard.
- WLAN wireless local area network
- the base station 102 serves as an access point or as a router, connecting one or more remote stations 104 to a network 106, which can be a local area network (LAN) or a wide area network (WAN), such as the Internet.
- the remote stations 104 typically are laptop or desktop computers configured with wireless network interface cards.
- the base station 102 is a hardware device that facilitates radio frequency (RF) communications with remote stations 104.
- the RF communications is typically two-way (with the base station 102 and remote station 104 transmitting and receiving information from one another); however, the non-simultaneous frequency diversity techniques described herein may also be used with one-way RF communications, such as, for example, a video or information broadcast system, or a pager system.
- the base station 102 includes at least one antenna and a signal processing unit.
- the signal processing unit typically includes components to filter and amplify signals, to convert signals between analog and digital, and to interpret and process received data.
- the base station 102 and remote stations 104 may be implemented using conventional electronic design and manufacturing techniques using application-specific integrated circuits and/or commercial off-the-shelf components. Portions of the implementations may be carried out in software-configured digital signal processors (DSPs) or general-purpose microprocessors.
- DSPs digital signal processors
- microprocessors general-purpose microprocessors
- frequency diversity is "transmission and reception in which the same information signal is transmitted simultaneously on two or more independently fading carrier frequencies.” Because fading typically is frequency-dependent, frequencies near one another are not likely to fade independently. For this reason, it is useful to choose two or more disparate carrier frequencies. However, using disparate carrier frequencies increases implementation expense and complexity.
- a radio communication system 100 employing simultaneous frequency diversity transmits duplicate information on multiple carriers.
- data to be sent by a base station 102 to a remote station 104 is transmitted at a first frequency /] (signal 202) and at a second frequency ⁇ (signal 204).
- the two frequencies/i and ⁇ 2 should be chosen such that they fade independently.
- frequencies/i and/ 2 can be chosen to be greater than 20 MHz apart so that the likelihood of both channels fading simultaneously is reduced.
- the frequency separation is implementation-dependent and is affected by a variety of technical and regulatory factors.
- a local oscillator may be used to generate a signal that is mixed with a data signal to raise its frequency to the transmission frequency. If signals 202 and 204 are too far apart, two LOs may be used with one LO used to generate signal 202 and a second LO to generate signal 204. So that a remote station 104 does not require simultaneous reception of signals 202 and 204, duplicate information may be transmitted on two or more independently fading carrier frequencies at different points in time.
- a radio communication system 100 may employ non-simultaneous frequency diversity such that only a single receive path is required, thereby reducing the complexity and expense of both the base station 102 and the remote stations 104.
- a radio communication system 100 using non- simultaneous frequency diversity transmits a signal 302 at a first frequency /j at time Ti and then transmits a signal 304 containing duplicate information at a second frequency f 2 at time T 2 .
- These figures only show the amplitude and frequency components of signals 302 and 304; however, they also may include a phase component.
- the signal 304 duplicates at least some of the information included in signal 302; however, the information may be encoded differently so that the signals 302 and 304 do not have identical amplitudes and phases.
- non-simultaneous frequency diversity provides many of the benefits of simultaneous frequency diversity without necessitating simultaneous reception.
- the time elapsed between Ti and T 2 is predetermined and may be based on the needed delay.
- information is transmitted twice to implement non- simultaneous frequency diversity.
- the information may be transmitted any number of times. Additional redundant transmissions may further improve performance at the expense of bandwidth.
- Redundant information may be simply retransmitted, or the radio communication system 100 may apply a complex gain, varying the phase and/or amplitude of the redundant signals.
- a receiving device may combine the two or more received transmissions, possibly resulting in signal gain.
- Tj the delay between transmissions
- T d the delay between transmissions
- Any values may be chosen for delays T; and Tj; however, less time is usually needed between transmissions at a single frequency or at nearby frequencies, so Tj is typically smaller than Td.
- three signals 322, 324, and 326 are sequentially transmitted at frequency f ⁇ .
- three signals 328, 330, and 332 are sequentially transmitted at a second frequency ⁇ .
- non-simultaneous frequency diversity illustrate the technique in a single-carrier transmission.
- Some modern communication systems employ multiple-carrier technology, such as, for example, spread spectrum, frequency division multiplexing, and orthogonal frequency division multiplexing (OFDM).
- OFDM orthogonal frequency division multiplexing
- a multi-carrier transmission system sends a signal across a wider communication channel, with portions of the signal modulated at various sub-carrier frequencies.
- an OFDM communication system transmits an information stream across a wideband channel (e.g., 20 MHz channel) that is divided into many narrow sub ⁇ channels.
- the information stream is broken into blocks such that multiple blocks may be modulated at various sub-carrier frequencies and transmitted across the sub-channels.
- Each block transmitted at a sub-carrier frequency is called a tone.
- the IEEE 802.16 standard provides for an OFDM implementation using a wideband channel having many as 2048 tones.
- a transmitted signal spans multiple frequencies.
- information transmitted in a first signal e.g., one or more tones from an OFDM transmission
- the information may be encoded differently from the first transmission to the second transmission.
- the system may apply a complex gain, rearrange portions of the information, or otherwise transform the information such that a receiving system can recover the transmitted information from one or more of the received signals.
- duplicate information may be transmitted on different tones (i.e., modulated at a different sub-carrier frequency) and/or transmitted on different channels (i.e., modulated to a frequency outside the wideband channel of the first transmission).
- a transmitted OFDM channel 402 includes multiple blocks of data spread across a range of frequencies (i.e., tones).
- the OFDM system may be extended to incorporate frequency diversity techniques by transmitting duplicate information in a second OFDM channel 404. If the second OFDM channel 404 is transmitted at a second point in time, then the radio communication system employs non-simultaneous frequency diversity.
- an OFDM radio communication system transmits multiple blocks of data simultaneously across multiple frequencies.
- Diagrams 452 and 454 show tones in an OFDM system transmitted at differing points in time.
- Diagram 452 shows data transmitted at a first range of frequencies and diagram 454 shows data transmitted at a second range of frequencies.
- a first OFDM signal is broadcast including information "A”, “B”, “C”, and “D”, with "D” transmitted in duplicate.
- a second OFDM signal is broadcast at a second range of frequencies containing the information "A", "B", “C”, and “D” with "C” and “D” duplicated.
- the information "A” is transmitted at corresponding tones within the channel (i.e., at the first data tone of each channel).
- the information "B” is retransmitted at a different relative location within the channel.
- the information "C” is transmitted in duplicate (using two separate tones) in the second channel.
- the information "D” is transmitted in duplicate in both the first and the second channels.
- a third OFDM signal is broadcast using the first channel with the information "A”.
- the information may be transmitted any number of times and the system may encode each transmission in a different way (i.e., the system may apply a complex gain or otherwise transform duplicate information).
- FIG. 4B shows that non-simultaneous frequency diversity may be implemented in a variety of ways such as, for example, the following: (1) duplicate information transmitted at corresponding frequencies at consecutive points in time (e.g., "A”); (2) multiple copies of duplicate information (e.g., "A", "C", and “D”); (3) duplicate information transmitted at non- consecutive points in time (e.g., "D”); and (4) information duplicated within a single channel (e.g., "D” and the second transmission of "C”).
- FIG. 5 A an implementation of a radio communication system 100 using non-simultaneous frequency diversity is built using a radio 500 for the base station 102 and remote stations 104.
- the radio 500 includes an antenna 502 for receiving and/or transmitting RF signals, a radio frequency (RF) stage 504 for converting signals between transmission frequency and baseband frequency, and a baseband stage 506.
- the antenna 502 may be implemented using any conventional technology, such as, for example, a quarter-wave omni-directional antenna.
- the radio 500 may use a single antenna for transmission and reception, or it may use multiple antennas to improve performance using beam forming and/or antenna diversity.
- the baseband stage 506 includes one or more integrated circuits, such as, for example, a digital signal processor (DSP), to implement application logic.
- DSP digital signal processor
- the DSP implements the physical layer (PHY), the media access control layer (MAC), and the network layer functions, such as, modulation/demodulation, coding/decoding, and traffic scheduling.
- the baseband stage 506 also may include components to support wireline (e.g., 10/100 Base T), wireless (e.g., 802.1 Ig), phoneline (e.g., HomePNA), and/or powerline interfaces.
- the RF stage 504 includes components to convert signals from transmission frequencies to baseband frequencies and vice versa.
- the RF stage 506 also provides analog- to-digital converters and digital-to-analog converters so that signals processed by the baseband stage 506 are digital.
- the Rl 7 stage 504 may be implemented using a local oscillator
- the LO 552 converts signals between transmission frequency and intermediate frequency which are used by the IF receiver 554 and the IF transmitter 556.
- the IF receiver 554 takes the received signal after it has been converted to IF and generates signals for processing by the baseband stage 506.
- the baseband stage 506 sends signals for transmission to the IF transmitter 556 in the RF stage.
- the IF transmitter 556 generates a transmission signal at the intermediate frequency, which is mixed with a signal from the LO 552 to convert the signal to transmission frequency.
- the local oscillator 552 and IF receiver 554 make up a receive path 558. Because the radio 500 uses non-simultaneous frequency diversity, only a single receive path is needed.
- the IF transmitter 556 provides an RF signal that is mixed with a signal from the LO 552 to convert the signal to a first transmission frequency. Then, the LO 552 may be used to produce a second signal to convert the same IF transmitter 556 signal to a second transmission frequency. Because the transmissions do not occur simultaneously, multiple IF transmitters 556 are not needed and the signal may be received using a single IF receiver 554 in a single receive path 558.
- the implementation shown in FIG. 5B is included to illustrate the receive path 558 benefits of non-simultaneous frequency diversity. In practice, additional components would be included, such as, for example, various filters, amplifiers, and logic.
- the local oscillator 552 may take too much time to settle.
- One solution is to use multiple local oscillators 552 with logic provided to select the appropriate LO 552 signal for a particular transmission or reception. Using two LOs 552, a radio 500 may down-convert a first transmission using the signal from one LO 552 and down-convert a second transmission using the signal from another LO 552. In this manner, the IF receiver 554 and the same receive path 558 may be used to provide frequency diversity.
- a base station 102 or a remote station 104 may transmit a signal using non-simultaneous frequency diversity by first identifying the information to be transmitted (602).
- the data link layer breaks information into frames for transmission across the physical layer.
- the information to be transmitted includes a single frame. The size of a frame may be dependent on link quality — if link quality is high, more information may be transmitted at each frequency; however, as link quality degrades, less and less information may be differentiated in a received signal.
- the information is then transmitted at a first frequency (604).
- the system then waits a predetermined amount of time before transmitting duplicate information (606).
- the amount of time to wait may be fixed or dynamic. If the wait time is fixed, it is best to choose the least amount of time such that the system can transmit at a different frequency.
- the system transmits duplicate information at a second frequency (608).
- the duplicate information may be identical to the information initially transmitted, or it may be encoded differently. Any coding techniques may be used so long as the receiving device is able to obtain the transmitted information from both the first and the second transmissions (if both are received correctly).
- a base station 102 or remote station 104 receives a signal transmitted using non-simultaneous frequency diversity by first receiving a first signal transmitted at a first frequency (652). After a predetermined amount of time, the system receives a second signal transmitted at a second frequency (654). The waiting period may be fixed or may be dynamically adjusted based on system performance.
- the system identifies the transmitted information based on the two signals (656). Any diversity combining technique may be used to identify the transmitted signal including: selection diversity, equal gain combining, and maximal ratio combining.
- selection diversity the system simply uses the strongest signal (i.e., the one with the highest signal-to-noise ratio).
- equal gain combining signals are linearly added.
- maximal ratio combining weights are calculated to combine the received signals to maximize the signal-to-noise ratio.
- the radio communication system 100 provides broadband wireless Internet services (based on the IEEE 802.16 standard), enabling remote devices 104 to access the Internet (network 106) through the base station 102.
- the remote devices 104 also called subscriber units
- the remote devices 104 may be deployed to customer's homes to enable high-speed Internet access similar to that provided by DSL or cable.
- Many wireless network systems employ orthogonal division multiplexing (OFDM) because it provides high spectral efficiency by spreading signals across a block of frequencies. In this implementation, OFDM is used along with non-simultaneous frequency diversity to improve performance.
- OFDM orthogonal division multiplexing
- Non-simultaneous frequency diversity may be used in any wireless technology to improve system performance without requiring that two disparate RF signals be received at the same time.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05772190A EP1774659A2 (en) | 2004-07-19 | 2005-07-18 | Non-simultaneous frequency diversity in radio communication systems |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/893,821 US7460839B2 (en) | 2004-07-19 | 2004-07-19 | Non-simultaneous frequency diversity in radio communication systems |
US10/893,821 | 2004-07-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2006020169A2 true WO2006020169A2 (en) | 2006-02-23 |
WO2006020169A3 WO2006020169A3 (en) | 2007-04-19 |
Family
ID=35758045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/025354 WO2006020169A2 (en) | 2004-07-19 | 2005-07-18 | Non-simultaneous frequency diversity in radio communication systems |
Country Status (5)
Country | Link |
---|---|
US (1) | US7460839B2 (en) |
EP (1) | EP1774659A2 (en) |
KR (1) | KR20070052267A (en) |
CN (1) | CN101124733A (en) |
WO (1) | WO2006020169A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11419034B2 (en) | 2008-03-25 | 2022-08-16 | Telefonaktiebolaget L M Ericsson (Publ) | Timing of component carriers in multi-carrier wireless networks |
Families Citing this family (211)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8019068B2 (en) * | 2000-12-01 | 2011-09-13 | Alcatel Lucent | Method of allocating power for the simultaneous downlink conveyance of information between multiple antennas and multiple destinations |
WO2005086802A2 (en) | 2004-03-08 | 2005-09-22 | Proxense, Llc | Linked account system using personal digital key (pdk-las) |
US7263335B2 (en) * | 2004-07-19 | 2007-08-28 | Purewave Networks, Inc. | Multi-connection, non-simultaneous frequency diversity in radio communication systems |
US8219129B2 (en) * | 2006-01-06 | 2012-07-10 | Proxense, Llc | Dynamic real-time tiered client access |
US11206664B2 (en) | 2006-01-06 | 2021-12-21 | Proxense, Llc | Wireless network synchronization of cells and client devices on a network |
US7904718B2 (en) | 2006-05-05 | 2011-03-08 | Proxense, Llc | Personal digital key differentiation for secure transactions |
JP4331221B2 (en) * | 2007-03-15 | 2009-09-16 | 株式会社東芝 | Wireless communication method, wireless transmission device, and wireless reception device |
US8659427B2 (en) | 2007-11-09 | 2014-02-25 | Proxense, Llc | Proximity-sensor supporting multiple application services |
US8171528B1 (en) | 2007-12-06 | 2012-05-01 | Proxense, Llc | Hybrid device having a personal digital key and receiver-decoder circuit and methods of use |
US9251332B2 (en) | 2007-12-19 | 2016-02-02 | Proxense, Llc | Security system and method for controlling access to computing resources |
US8508336B2 (en) | 2008-02-14 | 2013-08-13 | Proxense, Llc | Proximity-based healthcare management system with automatic access to private information |
WO2009126732A2 (en) | 2008-04-08 | 2009-10-15 | Proxense, Llc | Automated service-based order processing |
US9418205B2 (en) | 2010-03-15 | 2016-08-16 | Proxense, Llc | Proximity-based system for automatic application or data access and item tracking |
US8918854B1 (en) | 2010-07-15 | 2014-12-23 | Proxense, Llc | Proximity-based system for automatic application initialization |
US8301196B2 (en) | 2010-08-03 | 2012-10-30 | Honeywell International Inc. | Reconfigurable wireless modem adapter including diversity/MIMO modems |
US8326359B2 (en) * | 2010-08-03 | 2012-12-04 | Honeywell International Inc. | Reconfigurable wireless modem adapter |
US9265450B1 (en) | 2011-02-21 | 2016-02-23 | Proxense, Llc | Proximity-based system for object tracking and automatic application initialization |
US9337879B2 (en) | 2011-04-25 | 2016-05-10 | Aviat U.S., Inc. | Systems and methods for multi-channel transceiver communications |
US8842788B2 (en) | 2011-10-17 | 2014-09-23 | Aviat U.S., Inc. | Systems and methods for improved high capacity in wireless communication systems |
US8983400B2 (en) | 2011-04-25 | 2015-03-17 | Aviat U.S., Inc. | Systems and methods for reduction of triple transit effects in transceiver communications |
SG11201401543RA (en) | 2011-10-17 | 2014-05-29 | Aviat Networks Inc | Systems and methods for signal frequency division in wireless communication systems |
WO2013106779A2 (en) * | 2012-01-11 | 2013-07-18 | Aviat Networks, Inc. | Systems and methods for improved high capacity in wireless communication systems |
US9966765B1 (en) | 2013-06-25 | 2018-05-08 | Energous Corporation | Multi-mode transmitter |
US9867062B1 (en) | 2014-07-21 | 2018-01-09 | Energous Corporation | System and methods for using a remote server to authorize a receiving device that has requested wireless power and to determine whether another receiving device should request wireless power in a wireless power transmission system |
US9887739B2 (en) | 2012-07-06 | 2018-02-06 | Energous Corporation | Systems and methods for wireless power transmission by comparing voltage levels associated with power waves transmitted by antennas of a plurality of antennas of a transmitter to determine appropriate phase adjustments for the power waves |
US10992185B2 (en) | 2012-07-06 | 2021-04-27 | Energous Corporation | Systems and methods of using electromagnetic waves to wirelessly deliver power to game controllers |
US9906065B2 (en) | 2012-07-06 | 2018-02-27 | Energous Corporation | Systems and methods of transmitting power transmission waves based on signals received at first and second subsets of a transmitter's antenna array |
US9941747B2 (en) | 2014-07-14 | 2018-04-10 | Energous Corporation | System and method for manually selecting and deselecting devices to charge in a wireless power network |
US10103582B2 (en) | 2012-07-06 | 2018-10-16 | Energous Corporation | Transmitters for wireless power transmission |
US9853692B1 (en) | 2014-05-23 | 2017-12-26 | Energous Corporation | Systems and methods for wireless power transmission |
US10270261B2 (en) | 2015-09-16 | 2019-04-23 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US10008889B2 (en) | 2014-08-21 | 2018-06-26 | Energous Corporation | Method for automatically testing the operational status of a wireless power receiver in a wireless power transmission system |
US10124754B1 (en) | 2013-07-19 | 2018-11-13 | Energous Corporation | Wireless charging and powering of electronic sensors in a vehicle |
US9843201B1 (en) | 2012-07-06 | 2017-12-12 | Energous Corporation | Wireless power transmitter that selects antenna sets for transmitting wireless power to a receiver based on location of the receiver, and methods of use thereof |
US9859797B1 (en) | 2014-05-07 | 2018-01-02 | Energous Corporation | Synchronous rectifier design for wireless power receiver |
US9948135B2 (en) | 2015-09-22 | 2018-04-17 | Energous Corporation | Systems and methods for identifying sensitive objects in a wireless charging transmission field |
US9871398B1 (en) | 2013-07-01 | 2018-01-16 | Energous Corporation | Hybrid charging method for wireless power transmission based on pocket-forming |
US9787103B1 (en) | 2013-08-06 | 2017-10-10 | Energous Corporation | Systems and methods for wirelessly delivering power to electronic devices that are unable to communicate with a transmitter |
US10211680B2 (en) | 2013-07-19 | 2019-02-19 | Energous Corporation | Method for 3 dimensional pocket-forming |
US10199849B1 (en) | 2014-08-21 | 2019-02-05 | Energous Corporation | Method for automatically testing the operational status of a wireless power receiver in a wireless power transmission system |
US10193396B1 (en) | 2014-05-07 | 2019-01-29 | Energous Corporation | Cluster management of transmitters in a wireless power transmission system |
US9859757B1 (en) | 2013-07-25 | 2018-01-02 | Energous Corporation | Antenna tile arrangements in electronic device enclosures |
US9838083B2 (en) | 2014-07-21 | 2017-12-05 | Energous Corporation | Systems and methods for communication with remote management systems |
US9891669B2 (en) | 2014-08-21 | 2018-02-13 | Energous Corporation | Systems and methods for a configuration web service to provide configuration of a wireless power transmitter within a wireless power transmission system |
US10965164B2 (en) | 2012-07-06 | 2021-03-30 | Energous Corporation | Systems and methods of wirelessly delivering power to a receiver device |
US10992187B2 (en) | 2012-07-06 | 2021-04-27 | Energous Corporation | System and methods of using electromagnetic waves to wirelessly deliver power to electronic devices |
US20150326070A1 (en) | 2014-05-07 | 2015-11-12 | Energous Corporation | Methods and Systems for Maximum Power Point Transfer in Receivers |
US9859756B2 (en) | 2012-07-06 | 2018-01-02 | Energous Corporation | Transmittersand methods for adjusting wireless power transmission based on information from receivers |
US10128693B2 (en) | 2014-07-14 | 2018-11-13 | Energous Corporation | System and method for providing health safety in a wireless power transmission system |
US10205239B1 (en) | 2014-05-07 | 2019-02-12 | Energous Corporation | Compact PIFA antenna |
US9438045B1 (en) | 2013-05-10 | 2016-09-06 | Energous Corporation | Methods and systems for maximum power point transfer in receivers |
US9923386B1 (en) | 2012-07-06 | 2018-03-20 | Energous Corporation | Systems and methods for wireless power transmission by modifying a number of antenna elements used to transmit power waves to a receiver |
US9893555B1 (en) | 2013-10-10 | 2018-02-13 | Energous Corporation | Wireless charging of tools using a toolbox transmitter |
US10141791B2 (en) | 2014-05-07 | 2018-11-27 | Energous Corporation | Systems and methods for controlling communications during wireless transmission of power using application programming interfaces |
US10256657B2 (en) | 2015-12-24 | 2019-04-09 | Energous Corporation | Antenna having coaxial structure for near field wireless power charging |
US10291055B1 (en) | 2014-12-29 | 2019-05-14 | Energous Corporation | Systems and methods for controlling far-field wireless power transmission based on battery power levels of a receiving device |
US10223717B1 (en) | 2014-05-23 | 2019-03-05 | Energous Corporation | Systems and methods for payment-based authorization of wireless power transmission service |
US9806564B2 (en) | 2014-05-07 | 2017-10-31 | Energous Corporation | Integrated rectifier and boost converter for wireless power transmission |
US10439448B2 (en) | 2014-08-21 | 2019-10-08 | Energous Corporation | Systems and methods for automatically testing the communication between wireless power transmitter and wireless power receiver |
US9973021B2 (en) | 2012-07-06 | 2018-05-15 | Energous Corporation | Receivers for wireless power transmission |
US9912199B2 (en) | 2012-07-06 | 2018-03-06 | Energous Corporation | Receivers for wireless power transmission |
US9899873B2 (en) | 2014-05-23 | 2018-02-20 | Energous Corporation | System and method for generating a power receiver identifier in a wireless power network |
US10090699B1 (en) | 2013-11-01 | 2018-10-02 | Energous Corporation | Wireless powered house |
US10224982B1 (en) | 2013-07-11 | 2019-03-05 | Energous Corporation | Wireless power transmitters for transmitting wireless power and tracking whether wireless power receivers are within authorized locations |
US9887584B1 (en) | 2014-08-21 | 2018-02-06 | Energous Corporation | Systems and methods for a configuration web service to provide configuration of a wireless power transmitter within a wireless power transmission system |
US10211682B2 (en) | 2014-05-07 | 2019-02-19 | Energous Corporation | Systems and methods for controlling operation of a transmitter of a wireless power network based on user instructions received from an authenticated computing device powered or charged by a receiver of the wireless power network |
US10230266B1 (en) | 2014-02-06 | 2019-03-12 | Energous Corporation | Wireless power receivers that communicate status data indicating wireless power transmission effectiveness with a transmitter using a built-in communications component of a mobile device, and methods of use thereof |
US9831718B2 (en) | 2013-07-25 | 2017-11-28 | Energous Corporation | TV with integrated wireless power transmitter |
US10050462B1 (en) | 2013-08-06 | 2018-08-14 | Energous Corporation | Social power sharing for mobile devices based on pocket-forming |
US10224758B2 (en) | 2013-05-10 | 2019-03-05 | Energous Corporation | Wireless powering of electronic devices with selective delivery range |
US9954374B1 (en) | 2014-05-23 | 2018-04-24 | Energous Corporation | System and method for self-system analysis for detecting a fault in a wireless power transmission Network |
US10243414B1 (en) | 2014-05-07 | 2019-03-26 | Energous Corporation | Wearable device with wireless power and payload receiver |
US10186913B2 (en) | 2012-07-06 | 2019-01-22 | Energous Corporation | System and methods for pocket-forming based on constructive and destructive interferences to power one or more wireless power receivers using a wireless power transmitter including a plurality of antennas |
US9939864B1 (en) | 2014-08-21 | 2018-04-10 | Energous Corporation | System and method to control a wireless power transmission system by configuration of wireless power transmission control parameters |
US9124125B2 (en) | 2013-05-10 | 2015-09-01 | Energous Corporation | Wireless power transmission with selective range |
US10291066B1 (en) | 2014-05-07 | 2019-05-14 | Energous Corporation | Power transmission control systems and methods |
US10128699B2 (en) | 2014-07-14 | 2018-11-13 | Energous Corporation | Systems and methods of providing wireless power using receiver device sensor inputs |
US9941707B1 (en) | 2013-07-19 | 2018-04-10 | Energous Corporation | Home base station for multiple room coverage with multiple transmitters |
US20140008993A1 (en) | 2012-07-06 | 2014-01-09 | DvineWave Inc. | Methodology for pocket-forming |
US9853458B1 (en) | 2014-05-07 | 2017-12-26 | Energous Corporation | Systems and methods for device and power receiver pairing |
US9847679B2 (en) | 2014-05-07 | 2017-12-19 | Energous Corporation | System and method for controlling communication between wireless power transmitter managers |
US10211674B1 (en) | 2013-06-12 | 2019-02-19 | Energous Corporation | Wireless charging using selected reflectors |
US9882430B1 (en) | 2014-05-07 | 2018-01-30 | Energous Corporation | Cluster management of transmitters in a wireless power transmission system |
US10075008B1 (en) | 2014-07-14 | 2018-09-11 | Energous Corporation | Systems and methods for manually adjusting when receiving electronic devices are scheduled to receive wirelessly delivered power from a wireless power transmitter in a wireless power network |
US9824815B2 (en) | 2013-05-10 | 2017-11-21 | Energous Corporation | Wireless charging and powering of healthcare gadgets and sensors |
US9812890B1 (en) | 2013-07-11 | 2017-11-07 | Energous Corporation | Portable wireless charging pad |
US9876394B1 (en) | 2014-05-07 | 2018-01-23 | Energous Corporation | Boost-charger-boost system for enhanced power delivery |
US9143000B2 (en) | 2012-07-06 | 2015-09-22 | Energous Corporation | Portable wireless charging pad |
US9847677B1 (en) | 2013-10-10 | 2017-12-19 | Energous Corporation | Wireless charging and powering of healthcare gadgets and sensors |
US9843213B2 (en) | 2013-08-06 | 2017-12-12 | Energous Corporation | Social power sharing for mobile devices based on pocket-forming |
US9252628B2 (en) | 2013-05-10 | 2016-02-02 | Energous Corporation | Laptop computer as a transmitter for wireless charging |
US9893554B2 (en) | 2014-07-14 | 2018-02-13 | Energous Corporation | System and method for providing health safety in a wireless power transmission system |
US9876379B1 (en) | 2013-07-11 | 2018-01-23 | Energous Corporation | Wireless charging and powering of electronic devices in a vehicle |
US9900057B2 (en) | 2012-07-06 | 2018-02-20 | Energous Corporation | Systems and methods for assigning groups of antenas of a wireless power transmitter to different wireless power receivers, and determining effective phases to use for wirelessly transmitting power using the assigned groups of antennas |
US10199835B2 (en) | 2015-12-29 | 2019-02-05 | Energous Corporation | Radar motion detection using stepped frequency in wireless power transmission system |
US9941754B2 (en) | 2012-07-06 | 2018-04-10 | Energous Corporation | Wireless power transmission with selective range |
US11502551B2 (en) | 2012-07-06 | 2022-11-15 | Energous Corporation | Wirelessly charging multiple wireless-power receivers using different subsets of an antenna array to focus energy at different locations |
US9899861B1 (en) | 2013-10-10 | 2018-02-20 | Energous Corporation | Wireless charging methods and systems for game controllers, based on pocket-forming |
US10381880B2 (en) | 2014-07-21 | 2019-08-13 | Energous Corporation | Integrated antenna structure arrays for wireless power transmission |
US9991741B1 (en) | 2014-07-14 | 2018-06-05 | Energous Corporation | System for tracking and reporting status and usage information in a wireless power management system |
US10063106B2 (en) | 2014-05-23 | 2018-08-28 | Energous Corporation | System and method for a self-system analysis in a wireless power transmission network |
US9368020B1 (en) | 2013-05-10 | 2016-06-14 | Energous Corporation | Off-premises alert system and method for wireless power receivers in a wireless power network |
US10141768B2 (en) | 2013-06-03 | 2018-11-27 | Energous Corporation | Systems and methods for maximizing wireless power transfer efficiency by instructing a user to change a receiver device's position |
US10063064B1 (en) | 2014-05-23 | 2018-08-28 | Energous Corporation | System and method for generating a power receiver identifier in a wireless power network |
US10090886B1 (en) | 2014-07-14 | 2018-10-02 | Energous Corporation | System and method for enabling automatic charging schedules in a wireless power network to one or more devices |
US9793758B2 (en) | 2014-05-23 | 2017-10-17 | Energous Corporation | Enhanced transmitter using frequency control for wireless power transmission |
US10312715B2 (en) | 2015-09-16 | 2019-06-04 | Energous Corporation | Systems and methods for wireless power charging |
US9876648B2 (en) | 2014-08-21 | 2018-01-23 | Energous Corporation | System and method to control a wireless power transmission system by configuration of wireless power transmission control parameters |
US9893768B2 (en) | 2012-07-06 | 2018-02-13 | Energous Corporation | Methodology for multiple pocket-forming |
US10063105B2 (en) | 2013-07-11 | 2018-08-28 | Energous Corporation | Proximity transmitters for wireless power charging systems |
US10263432B1 (en) | 2013-06-25 | 2019-04-16 | Energous Corporation | Multi-mode transmitter with an antenna array for delivering wireless power and providing Wi-Fi access |
US10148097B1 (en) | 2013-11-08 | 2018-12-04 | Energous Corporation | Systems and methods for using a predetermined number of communication channels of a wireless power transmitter to communicate with different wireless power receivers |
US9882427B2 (en) | 2013-05-10 | 2018-01-30 | Energous Corporation | Wireless power delivery using a base station to control operations of a plurality of wireless power transmitters |
US9825674B1 (en) | 2014-05-23 | 2017-11-21 | Energous Corporation | Enhanced transmitter that selects configurations of antenna elements for performing wireless power transmission and receiving functions |
US10038337B1 (en) | 2013-09-16 | 2018-07-31 | Energous Corporation | Wireless power supply for rescue devices |
US10218227B2 (en) | 2014-05-07 | 2019-02-26 | Energous Corporation | Compact PIFA antenna |
US10206185B2 (en) | 2013-05-10 | 2019-02-12 | Energous Corporation | System and methods for wireless power transmission to an electronic device in accordance with user-defined restrictions |
US9538382B2 (en) | 2013-05-10 | 2017-01-03 | Energous Corporation | System and method for smart registration of wireless power receivers in a wireless power network |
US9843763B2 (en) | 2013-05-10 | 2017-12-12 | Energous Corporation | TV system with wireless power transmitter |
US9819230B2 (en) | 2014-05-07 | 2017-11-14 | Energous Corporation | Enhanced receiver for wireless power transmission |
US9537357B2 (en) | 2013-05-10 | 2017-01-03 | Energous Corporation | Wireless sound charging methods and systems for game controllers, based on pocket-forming |
US9405898B2 (en) | 2013-05-10 | 2016-08-02 | Proxense, Llc | Secure element as a digital pocket |
US9866279B2 (en) | 2013-05-10 | 2018-01-09 | Energous Corporation | Systems and methods for selecting which power transmitter should deliver wireless power to a receiving device in a wireless power delivery network |
US9419443B2 (en) | 2013-05-10 | 2016-08-16 | Energous Corporation | Transducer sound arrangement for pocket-forming |
US10103552B1 (en) | 2013-06-03 | 2018-10-16 | Energous Corporation | Protocols for authenticated wireless power transmission |
US10003211B1 (en) | 2013-06-17 | 2018-06-19 | Energous Corporation | Battery life of portable electronic devices |
US10021523B2 (en) | 2013-07-11 | 2018-07-10 | Energous Corporation | Proximity transmitters for wireless power charging systems |
US9979440B1 (en) | 2013-07-25 | 2018-05-22 | Energous Corporation | Antenna tile arrangements configured to operate as one functional unit |
US9419846B2 (en) | 2014-01-03 | 2016-08-16 | Honeywell International Inc. | Integrated wireless module |
US9935482B1 (en) | 2014-02-06 | 2018-04-03 | Energous Corporation | Wireless power transmitters that transmit at determined times based on power availability and consumption at a receiving mobile device |
US10075017B2 (en) | 2014-02-06 | 2018-09-11 | Energous Corporation | External or internal wireless power receiver with spaced-apart antenna elements for charging or powering mobile devices using wirelessly delivered power |
US9966784B2 (en) | 2014-06-03 | 2018-05-08 | Energous Corporation | Systems and methods for extending battery life of portable electronic devices charged by sound |
US10158257B2 (en) | 2014-05-01 | 2018-12-18 | Energous Corporation | System and methods for using sound waves to wirelessly deliver power to electronic devices |
US9973008B1 (en) | 2014-05-07 | 2018-05-15 | Energous Corporation | Wireless power receiver with boost converters directly coupled to a storage element |
US9800172B1 (en) | 2014-05-07 | 2017-10-24 | Energous Corporation | Integrated rectifier and boost converter for boosting voltage received from wireless power transmission waves |
US10153645B1 (en) | 2014-05-07 | 2018-12-11 | Energous Corporation | Systems and methods for designating a master power transmitter in a cluster of wireless power transmitters |
US10153653B1 (en) | 2014-05-07 | 2018-12-11 | Energous Corporation | Systems and methods for using application programming interfaces to control communications between a transmitter and a receiver |
US10170917B1 (en) | 2014-05-07 | 2019-01-01 | Energous Corporation | Systems and methods for managing and controlling a wireless power network by establishing time intervals during which receivers communicate with a transmitter |
US9876536B1 (en) | 2014-05-23 | 2018-01-23 | Energous Corporation | Systems and methods for assigning groups of antennas to transmit wireless power to different wireless power receivers |
US10116143B1 (en) | 2014-07-21 | 2018-10-30 | Energous Corporation | Integrated antenna arrays for wireless power transmission |
US10068703B1 (en) | 2014-07-21 | 2018-09-04 | Energous Corporation | Integrated miniature PIFA with artificial magnetic conductor metamaterials |
US9871301B2 (en) | 2014-07-21 | 2018-01-16 | Energous Corporation | Integrated miniature PIFA with artificial magnetic conductor metamaterials |
US9965009B1 (en) | 2014-08-21 | 2018-05-08 | Energous Corporation | Systems and methods for assigning a power receiver to individual power transmitters based on location of the power receiver |
US9917477B1 (en) | 2014-08-21 | 2018-03-13 | Energous Corporation | Systems and methods for automatically testing the communication between power transmitter and wireless receiver |
US10122415B2 (en) | 2014-12-27 | 2018-11-06 | Energous Corporation | Systems and methods for assigning a set of antennas of a wireless power transmitter to a wireless power receiver based on a location of the wireless power receiver |
US9893535B2 (en) | 2015-02-13 | 2018-02-13 | Energous Corporation | Systems and methods for determining optimal charging positions to maximize efficiency of power received from wirelessly delivered sound wave energy |
JP6445356B2 (en) * | 2015-03-11 | 2018-12-26 | 古野電気株式会社 | Mobile body monitoring system, slave unit, master unit, and program |
CN108027417A (en) * | 2015-08-14 | 2018-05-11 | 索尼移动通讯有限公司 | Relative position between determining device |
US9906275B2 (en) | 2015-09-15 | 2018-02-27 | Energous Corporation | Identifying receivers in a wireless charging transmission field |
US10523033B2 (en) | 2015-09-15 | 2019-12-31 | Energous Corporation | Receiver devices configured to determine location within a transmission field |
US10158259B1 (en) | 2015-09-16 | 2018-12-18 | Energous Corporation | Systems and methods for identifying receivers in a transmission field by transmitting exploratory power waves towards different segments of a transmission field |
US10778041B2 (en) | 2015-09-16 | 2020-09-15 | Energous Corporation | Systems and methods for generating power waves in a wireless power transmission system |
US10199850B2 (en) | 2015-09-16 | 2019-02-05 | Energous Corporation | Systems and methods for wirelessly transmitting power from a transmitter to a receiver by determining refined locations of the receiver in a segmented transmission field associated with the transmitter |
US9893538B1 (en) | 2015-09-16 | 2018-02-13 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US10211685B2 (en) | 2015-09-16 | 2019-02-19 | Energous Corporation | Systems and methods for real or near real time wireless communications between a wireless power transmitter and a wireless power receiver |
US9941752B2 (en) | 2015-09-16 | 2018-04-10 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US10186893B2 (en) | 2015-09-16 | 2019-01-22 | Energous Corporation | Systems and methods for real time or near real time wireless communications between a wireless power transmitter and a wireless power receiver |
US10008875B1 (en) | 2015-09-16 | 2018-06-26 | Energous Corporation | Wireless power transmitter configured to transmit power waves to a predicted location of a moving wireless power receiver |
US11710321B2 (en) | 2015-09-16 | 2023-07-25 | Energous Corporation | Systems and methods of object detection in wireless power charging systems |
US9871387B1 (en) | 2015-09-16 | 2018-01-16 | Energous Corporation | Systems and methods of object detection using one or more video cameras in wireless power charging systems |
US10135294B1 (en) | 2015-09-22 | 2018-11-20 | Energous Corporation | Systems and methods for preconfiguring transmission devices for power wave transmissions based on location data of one or more receivers |
US10050470B1 (en) | 2015-09-22 | 2018-08-14 | Energous Corporation | Wireless power transmission device having antennas oriented in three dimensions |
US10027168B2 (en) | 2015-09-22 | 2018-07-17 | Energous Corporation | Systems and methods for generating and transmitting wireless power transmission waves using antennas having a spacing that is selected by the transmitter |
US10153660B1 (en) | 2015-09-22 | 2018-12-11 | Energous Corporation | Systems and methods for preconfiguring sensor data for wireless charging systems |
US10020678B1 (en) | 2015-09-22 | 2018-07-10 | Energous Corporation | Systems and methods for selecting antennas to generate and transmit power transmission waves |
US10033222B1 (en) | 2015-09-22 | 2018-07-24 | Energous Corporation | Systems and methods for determining and generating a waveform for wireless power transmission waves |
US10128686B1 (en) | 2015-09-22 | 2018-11-13 | Energous Corporation | Systems and methods for identifying receiver locations using sensor technologies |
US10135295B2 (en) | 2015-09-22 | 2018-11-20 | Energous Corporation | Systems and methods for nullifying energy levels for wireless power transmission waves |
US10333332B1 (en) | 2015-10-13 | 2019-06-25 | Energous Corporation | Cross-polarized dipole antenna |
US10734717B2 (en) | 2015-10-13 | 2020-08-04 | Energous Corporation | 3D ceramic mold antenna |
US9853485B2 (en) | 2015-10-28 | 2017-12-26 | Energous Corporation | Antenna for wireless charging systems |
US9899744B1 (en) | 2015-10-28 | 2018-02-20 | Energous Corporation | Antenna for wireless charging systems |
US10063108B1 (en) | 2015-11-02 | 2018-08-28 | Energous Corporation | Stamped three-dimensional antenna |
US10135112B1 (en) | 2015-11-02 | 2018-11-20 | Energous Corporation | 3D antenna mount |
US10027180B1 (en) | 2015-11-02 | 2018-07-17 | Energous Corporation | 3D triple linear antenna that acts as heat sink |
US10256677B2 (en) | 2016-12-12 | 2019-04-09 | Energous Corporation | Near-field RF charging pad with adaptive loading to efficiently charge an electronic device at any position on the pad |
US10027159B2 (en) | 2015-12-24 | 2018-07-17 | Energous Corporation | Antenna for transmitting wireless power signals |
US10079515B2 (en) | 2016-12-12 | 2018-09-18 | Energous Corporation | Near-field RF charging pad with multi-band antenna element with adaptive loading to efficiently charge an electronic device at any position on the pad |
US10320446B2 (en) | 2015-12-24 | 2019-06-11 | Energous Corporation | Miniaturized highly-efficient designs for near-field power transfer system |
US10135286B2 (en) | 2015-12-24 | 2018-11-20 | Energous Corporation | Near field transmitters for wireless power charging of an electronic device by leaking RF energy through an aperture offset from a patch antenna |
US10038332B1 (en) | 2015-12-24 | 2018-07-31 | Energous Corporation | Systems and methods of wireless power charging through multiple receiving devices |
US11863001B2 (en) | 2015-12-24 | 2024-01-02 | Energous Corporation | Near-field antenna for wireless power transmission with antenna elements that follow meandering patterns |
US10164478B2 (en) | 2015-12-29 | 2018-12-25 | Energous Corporation | Modular antenna boards in wireless power transmission systems |
US9787407B1 (en) | 2016-03-16 | 2017-10-10 | Google Inc. | Fading mitigation of the turbulent channel based on polarization diversity in coherent optical receivers |
EP3499898A4 (en) * | 2016-09-13 | 2019-09-25 | Samsung Electronics Co., Ltd. | Transmission device and transmission method therefor |
US10923954B2 (en) | 2016-11-03 | 2021-02-16 | Energous Corporation | Wireless power receiver with a synchronous rectifier |
KR20220008939A (en) | 2016-12-12 | 2022-01-21 | 에너저스 코포레이션 | Methods of selectively activating antenna zones of a near-field charging pad to maximize wireless power delivered |
US10389161B2 (en) | 2017-03-15 | 2019-08-20 | Energous Corporation | Surface mount dielectric antennas for wireless power transmitters |
US10439442B2 (en) | 2017-01-24 | 2019-10-08 | Energous Corporation | Microstrip antennas for wireless power transmitters |
US10680319B2 (en) | 2017-01-06 | 2020-06-09 | Energous Corporation | Devices and methods for reducing mutual coupling effects in wireless power transmission systems |
US11011942B2 (en) | 2017-03-30 | 2021-05-18 | Energous Corporation | Flat antennas having two or more resonant frequencies for use in wireless power transmission systems |
US10511097B2 (en) | 2017-05-12 | 2019-12-17 | Energous Corporation | Near-field antennas for accumulating energy at a near-field distance with minimal far-field gain |
US11462949B2 (en) | 2017-05-16 | 2022-10-04 | Wireless electrical Grid LAN, WiGL Inc | Wireless charging method and system |
US10848853B2 (en) | 2017-06-23 | 2020-11-24 | Energous Corporation | Systems, methods, and devices for utilizing a wire of a sound-producing device as an antenna for receipt of wirelessly delivered power |
US10122219B1 (en) | 2017-10-10 | 2018-11-06 | Energous Corporation | Systems, methods, and devices for using a battery as a antenna for receiving wirelessly delivered power from radio frequency power waves |
US11342798B2 (en) | 2017-10-30 | 2022-05-24 | Energous Corporation | Systems and methods for managing coexistence of wireless-power signals and data signals operating in a same frequency band |
US10615647B2 (en) | 2018-02-02 | 2020-04-07 | Energous Corporation | Systems and methods for detecting wireless power receivers and other objects at a near-field charging pad |
US11159057B2 (en) | 2018-03-14 | 2021-10-26 | Energous Corporation | Loop antennas with selectively-activated feeds to control propagation patterns of wireless power signals |
US11515732B2 (en) | 2018-06-25 | 2022-11-29 | Energous Corporation | Power wave transmission techniques to focus wirelessly delivered power at a receiving device |
US11437735B2 (en) | 2018-11-14 | 2022-09-06 | Energous Corporation | Systems for receiving electromagnetic energy using antennas that are minimally affected by the presence of the human body |
KR20210117283A (en) | 2019-01-28 | 2021-09-28 | 에너저스 코포레이션 | Systems and methods for a small antenna for wireless power transmission |
JP2022519749A (en) | 2019-02-06 | 2022-03-24 | エナージャス コーポレイション | Systems and methods for estimating the optimum phase for use with individual antennas in an antenna array |
US11381118B2 (en) | 2019-09-20 | 2022-07-05 | Energous Corporation | Systems and methods for machine learning based foreign object detection for wireless power transmission |
EP4032166A4 (en) | 2019-09-20 | 2023-10-18 | Energous Corporation | Systems and methods of protecting wireless power receivers using multiple rectifiers and establishing in-band communications using multiple rectifiers |
WO2021055898A1 (en) | 2019-09-20 | 2021-03-25 | Energous Corporation | Systems and methods for machine learning based foreign object detection for wireless power transmission |
CN114731061A (en) | 2019-09-20 | 2022-07-08 | 艾诺格思公司 | Classifying and detecting foreign objects using a power amplifier controller integrated circuit in a wireless power transmission system |
WO2021119483A1 (en) | 2019-12-13 | 2021-06-17 | Energous Corporation | Charging pad with guiding contours to align an electronic device on the charging pad and efficiently transfer near-field radio-frequency energy to the electronic device |
US10985617B1 (en) | 2019-12-31 | 2021-04-20 | Energous Corporation | System for wirelessly transmitting energy at a near-field distance without using beam-forming control |
US11799324B2 (en) | 2020-04-13 | 2023-10-24 | Energous Corporation | Wireless-power transmitting device for creating a uniform near-field charging area |
US11916398B2 (en) | 2021-12-29 | 2024-02-27 | Energous Corporation | Small form-factor devices with integrated and modular harvesting receivers, and shelving-mounted wireless-power transmitters for use therewith |
CN114859691B (en) * | 2022-03-25 | 2023-12-12 | 北京轩宇信息技术有限公司 | Wireless unidirectional time service system and method with safety isolation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030007477A1 (en) * | 1985-11-27 | 2003-01-09 | Seiko Instruments Inc. | Paging system with spacial, frequency and time diversity |
US20030142758A1 (en) * | 2001-06-26 | 2003-07-31 | Mikio Sakaue | Radio transmitter-receiver |
US20030235147A1 (en) * | 2002-06-24 | 2003-12-25 | Walton Jay R. | Diversity transmission modes for MIMO OFDM communication systems |
Family Cites Families (93)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2189348B (en) | 1979-05-23 | 1988-04-20 | Standard Telephones Cables Ltd | Adaptive antenna arrays for frequency hopped systems |
US4651155A (en) | 1982-05-28 | 1987-03-17 | Hazeltine Corporation | Beamforming/null-steering adaptive array |
US5625880A (en) | 1991-12-12 | 1997-04-29 | Arraycomm, Incorporated | Spectrally efficient and high capacity acknowledgement radio paging system |
US5592490A (en) | 1991-12-12 | 1997-01-07 | Arraycomm, Inc. | Spectrally efficient high capacity wireless communication systems |
US5828658A (en) | 1991-12-12 | 1998-10-27 | Arraycomm, Inc. | Spectrally efficient high capacity wireless communication systems with spatio-temporal processing |
US5546090A (en) | 1991-12-12 | 1996-08-13 | Arraycomm, Inc. | Method and apparatus for calibrating antenna arrays |
US5515378A (en) | 1991-12-12 | 1996-05-07 | Arraycomm, Inc. | Spatial division multiple access wireless communication systems |
US5619503A (en) | 1994-01-11 | 1997-04-08 | Ericsson Inc. | Cellular/satellite communications system with improved frequency re-use |
US5519735A (en) | 1994-04-28 | 1996-05-21 | Lockheed Missiles & Space Co., Inc. | Reconstructing a primary signal from many secondary signals |
US5694416A (en) | 1995-02-24 | 1997-12-02 | Radix Technologies, Inc. | Direct sequence spread spectrum receiver and antenna array for the simultaneous formation of a beam on a signal source and a null on an interfering jammer |
EP0846378B1 (en) | 1995-08-22 | 1999-10-06 | Thomson-Csf | Method and device for spatial multiplexing-demultiplexing of radio signals for an sdma mobile radio system |
US5894473A (en) | 1996-02-29 | 1999-04-13 | Ericsson Inc. | Multiple access communications system and method using code and time division |
JPH09321682A (en) * | 1996-05-27 | 1997-12-12 | Sony Corp | Communication system, communication method and terminal equipment |
US6275543B1 (en) | 1996-10-11 | 2001-08-14 | Arraycomm, Inc. | Method for reference signal generation in the presence of frequency offsets in a communications station with spatial processing |
US5930243A (en) | 1996-10-11 | 1999-07-27 | Arraycomm, Inc. | Method and apparatus for estimating parameters of a communication system using antenna arrays and spatial processing |
US5909470A (en) | 1996-10-11 | 1999-06-01 | Arraycomm, Inc. | Method and apparatus for decision directed demodulation using antenna arrays and spatial processing |
US6463295B1 (en) | 1996-10-11 | 2002-10-08 | Arraycomm, Inc. | Power control with signal quality estimation for smart antenna communication systems |
US6047189A (en) | 1996-10-11 | 2000-04-04 | Arraycomm, Inc. | Adaptive method for channel assignment in a cellular communication system |
US5886988A (en) | 1996-10-23 | 1999-03-23 | Arraycomm, Inc. | Channel assignment and call admission control for spatial division multiple access communication systems |
US6122260A (en) | 1996-12-16 | 2000-09-19 | Civil Telecommunications, Inc. | Smart antenna CDMA wireless communication system |
US6466565B1 (en) | 1997-01-08 | 2002-10-15 | Trafficmaster Usa, Inc. | Measurement of spatial signature information in CDMA wireless communication systems |
US6301238B1 (en) | 1997-01-28 | 2001-10-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Directional-beam generative apparatus and associated method |
US5933421A (en) | 1997-02-06 | 1999-08-03 | At&T Wireless Services Inc. | Method for frequency division duplex communications |
WO1998037654A2 (en) | 1997-02-24 | 1998-08-27 | At & T Wireless Services, Inc. | Vertical adaptive antenna array for a discrete multitone spread spectrum communications system |
US6128276A (en) | 1997-02-24 | 2000-10-03 | Radix Wireless, Inc. | Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays |
US6584144B2 (en) | 1997-02-24 | 2003-06-24 | At&T Wireless Services, Inc. | Vertical adaptive antenna array for a discrete multitone spread spectrum communications system |
US6359923B1 (en) | 1997-12-18 | 2002-03-19 | At&T Wireless Services, Inc. | Highly bandwidth efficient communications |
US6141542A (en) | 1997-07-31 | 2000-10-31 | Motorola, Inc. | Method and apparatus for controlling transmit diversity in a communication system |
US5909471A (en) | 1997-08-08 | 1999-06-01 | Arraycomm, Inc. | Method and system for rapid initial control signal detection in a wireless communications system |
GB2343801B (en) | 1997-08-21 | 2001-09-12 | Data Fusion Corp | Method and apparatus for acquiring wide-band pseudorandom noise encoded waveforms |
US6009124A (en) | 1997-09-22 | 1999-12-28 | Intel Corporation | High data rate communications network employing an adaptive sectored antenna |
US6009335A (en) | 1997-09-26 | 1999-12-28 | Rockwell Science Center, Inc. | Method of calibrating and testing spatial nulling antenna |
US6037898A (en) | 1997-10-10 | 2000-03-14 | Arraycomm, Inc. | Method and apparatus for calibrating radio frequency base stations using antenna arrays |
US6665285B1 (en) | 1997-10-14 | 2003-12-16 | Alvarion Israel (2003) Ltd. | Ethernet switch in a terminal for a wireless metropolitan area network |
US6130859A (en) | 1997-12-01 | 2000-10-10 | Divecom Ltd. | Method and apparatus for carrying out high data rate and voice underwater communication |
US6185440B1 (en) | 1997-12-10 | 2001-02-06 | Arraycomm, Inc. | Method for sequentially transmitting a downlink signal from a communication station that has an antenna array to achieve an omnidirectional radiation |
US6154661A (en) | 1997-12-10 | 2000-11-28 | Arraycomm, Inc. | Transmitting on the downlink using one or more weight vectors determined to achieve a desired radiation pattern |
US5982327A (en) | 1998-01-12 | 1999-11-09 | Motorola, Inc. | Adaptive array method, device, base station and subscriber unit |
US5955992A (en) | 1998-02-12 | 1999-09-21 | Shattil; Steve J. | Frequency-shifted feedback cavity used as a phased array antenna controller and carrier interference multiple access spread-spectrum transmitter |
US6686879B2 (en) | 1998-02-12 | 2004-02-03 | Genghiscomm, Llc | Method and apparatus for transmitting and receiving signals having a carrier interferometry architecture |
US6134261A (en) | 1998-03-05 | 2000-10-17 | At&T Wireless Svcs. Inc | FDD forward link beamforming method for a FDD communications system |
US6333937B1 (en) | 1998-03-05 | 2001-12-25 | At&T Wireless Services, Inc. | Access retry method for shared channel wireless communications links |
US6643281B1 (en) | 1998-03-05 | 2003-11-04 | At&T Wireless Services, Inc. | Synchronization preamble method for OFDM waveforms in a communications system |
US5973642A (en) | 1998-04-01 | 1999-10-26 | At&T Corp. | Adaptive antenna arrays for orthogonal frequency division multiplexing systems with co-channel interference |
JP2933080B1 (en) | 1998-04-24 | 1999-08-09 | 日本電気株式会社 | Reception synchronizer using chirp signal |
US6615024B1 (en) | 1998-05-01 | 2003-09-02 | Arraycomm, Inc. | Method and apparatus for determining signatures for calibrating a communication station having an antenna array |
NZ510627A (en) | 1998-08-21 | 2003-10-31 | Evologics Gmbh | Method for transmitting information and suitable system therefor |
FR2786342B1 (en) * | 1998-08-28 | 2004-04-02 | Samsung Electronics Co Ltd | FREQUENCY SYNTHESIZER AND DOUBLE FREQUENCY HOPPING METHOD WITH FAST LOCKING TIME |
US6643321B1 (en) | 1998-09-30 | 2003-11-04 | Alvarion Ltd. | Method for rapid synchronization of a point to multipoint communication system |
US6023203A (en) | 1998-10-14 | 2000-02-08 | Arraycomm, Inc. | RF test fixture for adaptive-antenna radio systems |
US6304750B1 (en) | 1998-11-06 | 2001-10-16 | Lucent Technologies Inc. | Space-time diversity receiver for wireless systems |
GB9828216D0 (en) | 1998-12-21 | 1999-02-17 | Northern Telecom Ltd | A downlink beamforming approach for frequency division duplex cellular systems |
US6266528B1 (en) | 1998-12-23 | 2001-07-24 | Arraycomm, Inc. | Performance monitor for antenna arrays |
US6141393A (en) | 1999-03-03 | 2000-10-31 | Motorola, Inc. | Method and device for channel estimation, equalization, and interference suppression |
US6473418B1 (en) | 1999-03-11 | 2002-10-29 | Flarion Technologies, Inc. | Orthogonal frequency division multiplexing based spread spectrum multiple access |
US6177906B1 (en) | 1999-04-01 | 2001-01-23 | Arraycomm, Inc. | Multimode iterative adaptive smart antenna processing method and apparatus |
US6850740B1 (en) * | 1999-05-17 | 2005-02-01 | Telefonaktiebolaget Lm Ericsson | Time and frequency diversity in FH/TDD systems |
US6600914B2 (en) | 1999-05-24 | 2003-07-29 | Arraycomm, Inc. | System and method for emergency call channel allocation |
US6285720B1 (en) | 1999-05-28 | 2001-09-04 | W J Communications, Inc. | Method and apparatus for high data rate wireless communications over wavefield spaces |
US6141567A (en) | 1999-06-07 | 2000-10-31 | Arraycomm, Inc. | Apparatus and method for beamforming in a changing-interference environment |
US6587514B1 (en) | 1999-07-13 | 2003-07-01 | Pmc-Sierra, Inc. | Digital predistortion methods for wideband amplifiers |
US6598014B1 (en) | 1999-10-21 | 2003-07-22 | Massachusetts Institute Of Technology | Closed-loop multistage beamformer |
US6377636B1 (en) | 1999-11-02 | 2002-04-23 | Iospan Wirless, Inc. | Method and wireless communications system using coordinated transmission and training for interference mitigation |
US6351499B1 (en) | 1999-12-15 | 2002-02-26 | Iospan Wireless, Inc. | Method and wireless systems using multiple antennas and adaptive control for maximizing a communication parameter |
US6553019B1 (en) | 1999-12-23 | 2003-04-22 | Flarion Technologies, Inc. | Communications system employing orthogonal frequency division multiplexing based spread sprectrum multiple access |
US6370182B2 (en) | 2000-02-10 | 2002-04-09 | Itt Manufacturing Enterprises, Inc. | Integrated beamforming/rake/mud CDMA receiver architecture |
US6477359B2 (en) | 2000-05-05 | 2002-11-05 | Stephen B. Heppe | Diversity reception for aeronautical packet data communications systems |
US6647015B2 (en) | 2000-05-22 | 2003-11-11 | Sarnoff Corporation | Method and apparatus for providing a broadband, wireless, communications network |
US6441784B1 (en) | 2000-06-30 | 2002-08-27 | Arraycomm, Inc. | Method and apparatus for uplink and downlink weight prediction in adaptive array systems |
US6445342B1 (en) | 2000-06-30 | 2002-09-03 | Motorola, Inc. | Method and device for multi-user frequency-domain channel estimation |
US6362781B1 (en) | 2000-06-30 | 2002-03-26 | Motorola, Inc. | Method and device for adaptive antenna combining weights |
US6647078B1 (en) | 2000-06-30 | 2003-11-11 | Motorola, Inc. | Method and device for multi-user frequency-domain channel estimation based on gradient optimization techniques |
US6504506B1 (en) | 2000-06-30 | 2003-01-07 | Motorola, Inc. | Method and device for fixed in time adaptive antenna combining weights |
US6459171B1 (en) | 2000-07-21 | 2002-10-01 | Arraycomm, Inc. | Method and apparatus for sharing power |
US6639541B1 (en) | 2000-08-29 | 2003-10-28 | The United States Of America As Represented By The Secretary Of The Navy | Device and method for detecting, measuring, and reporting low-level interference at a receiver |
US6564036B1 (en) | 2000-09-29 | 2003-05-13 | Arraycomm, Inc. | Mode switching in adaptive array communications systems |
US6650714B2 (en) | 2000-11-30 | 2003-11-18 | Arraycomm, Inc. | Spatial processing and timing estimation using a training sequence in a radio communications system |
US6684366B1 (en) | 2000-09-29 | 2004-01-27 | Arraycomm, Inc. | Multi-rate codec with puncture control |
US6369758B1 (en) | 2000-11-01 | 2002-04-09 | Unique Broadband Systems, Inc. | Adaptive antenna array for mobile communication |
US6650881B1 (en) | 2000-11-30 | 2003-11-18 | Arraycomm, Inc. | Calculating spatial weights in a radio communications system |
US6651210B1 (en) | 2000-12-21 | 2003-11-18 | Arraycomm, Inc. | Flexible multi-bit per symbol rate encoding |
US6683915B1 (en) | 2000-12-21 | 2004-01-27 | Arraycomm, Inc. | Multi-bit per symbol rate quadrature amplitude encoding |
US6496535B2 (en) | 2001-03-23 | 2002-12-17 | Navini Networks, Inc. | Method and system for effective channel estimation in a telecommunication system |
US6496140B1 (en) | 2001-03-27 | 2002-12-17 | Nokia Networks Oy | Method for calibrating a smart-antenna array radio transceiver unit and calibrating system |
US6611231B2 (en) | 2001-04-27 | 2003-08-26 | Vivato, Inc. | Wireless packet switched communication systems and networks using adaptively steered antenna arrays |
FR2824431A1 (en) | 2001-05-03 | 2002-11-08 | Mitsubishi Electric Inf Tech | METHOD AND DEVICE FOR RECEIVING SIGNAL |
US6662024B2 (en) | 2001-05-16 | 2003-12-09 | Qualcomm Incorporated | Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system |
US6448938B1 (en) | 2001-06-12 | 2002-09-10 | Tantivy Communications, Inc. | Method and apparatus for frequency selective beam forming |
US6633856B2 (en) | 2001-06-15 | 2003-10-14 | Flarion Technologies, Inc. | Methods and apparatus for decoding LDPC codes |
US6441786B1 (en) | 2001-07-20 | 2002-08-27 | Motorola, Inc. | Adaptive antenna array and method for control thereof |
US6570527B1 (en) | 2001-09-28 | 2003-05-27 | Arraycomm, Inc. | Calibration of differential frequency-dependent characteristics of a radio communications system |
US6563885B1 (en) | 2001-10-24 | 2003-05-13 | Texas Instruments Incorporated | Decimated noise estimation and/or beamforming for wireless communications |
US6687492B1 (en) | 2002-03-01 | 2004-02-03 | Cognio, Inc. | System and method for antenna diversity using joint maximal ratio combining |
-
2004
- 2004-07-19 US US10/893,821 patent/US7460839B2/en active Active - Reinstated
-
2005
- 2005-07-18 CN CNA2005800315246A patent/CN101124733A/en active Pending
- 2005-07-18 EP EP05772190A patent/EP1774659A2/en not_active Withdrawn
- 2005-07-18 KR KR1020077001677A patent/KR20070052267A/en not_active Application Discontinuation
- 2005-07-18 WO PCT/US2005/025354 patent/WO2006020169A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030007477A1 (en) * | 1985-11-27 | 2003-01-09 | Seiko Instruments Inc. | Paging system with spacial, frequency and time diversity |
US20030142758A1 (en) * | 2001-06-26 | 2003-07-31 | Mikio Sakaue | Radio transmitter-receiver |
US20030235147A1 (en) * | 2002-06-24 | 2003-12-25 | Walton Jay R. | Diversity transmission modes for MIMO OFDM communication systems |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11419034B2 (en) | 2008-03-25 | 2022-08-16 | Telefonaktiebolaget L M Ericsson (Publ) | Timing of component carriers in multi-carrier wireless networks |
US11785524B2 (en) | 2008-03-25 | 2023-10-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Timing of component carriers in multi-carrier wireless networks |
Also Published As
Publication number | Publication date |
---|---|
CN101124733A (en) | 2008-02-13 |
WO2006020169A3 (en) | 2007-04-19 |
EP1774659A2 (en) | 2007-04-18 |
US7460839B2 (en) | 2008-12-02 |
KR20070052267A (en) | 2007-05-21 |
US20060030279A1 (en) | 2006-02-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7460839B2 (en) | Non-simultaneous frequency diversity in radio communication systems | |
US7263335B2 (en) | Multi-connection, non-simultaneous frequency diversity in radio communication systems | |
US10680755B2 (en) | Dual mode communication systems and methods | |
US10177890B2 (en) | Spectrum allocation system and method for multi-band wireless RF data communications | |
US20050237923A1 (en) | Multi-bank OFDM high data rate extensions | |
US20060209672A1 (en) | Efficient OFDM communications with interference immunity | |
US7450658B2 (en) | Apparatus of transmitter and receiver for MIMO MC-CDMA system | |
US20020086707A1 (en) | Wireless communication system using block filtering and fast equalization-demodulation and method of operation | |
JP2007502072A (en) | System and method for adaptive bit loading in a multi-antenna orthogonal frequency division multiplexing communication system | |
WO2007101382A1 (en) | Spread spectrum orthogonal frequency division multiplexing mix system and method | |
KR20070053291A (en) | Multiple sub-carrier selection diversity architecture and method for wireless ofdm | |
US9543992B2 (en) | Simulcasting MIMO communication system | |
WO2017150418A1 (en) | Transmission method, transmitter, reception method, and receiver | |
WO2009097805A1 (en) | A method, system and device for broadband radio mobile communication | |
Ramesh et al. | Design and implementation of high throughput, low-complexity MIMO-OFDM transciever | |
Fettweis et al. | WIGWAM: System concept development for 1 Gbit/s air interface | |
JP2008258992A (en) | Radio communication equipment | |
WO1999035772A1 (en) | Parallel transmission method | |
EP1573952A1 (en) | A backward compatible transmitter diversity scheme for use in an ofdm communication system | |
Ahmed et al. | Asymptotic performance of transmit diversity via OFDM for multipath channels | |
Kaiser | Effects of channel estimation errors on spatial pre-coding schemes with phase flipping | |
Onebunne et al. | Improving Bit Error Rate of MIMO-OFDM System Using Discrete Wavelet Transformation | |
Sharma et al. | BER assessment of MIMO incorporated W-OFDM wireless communication system | |
Manimegalai et al. | Energy Efficient Cooperative Communication with Grouped Relay in MB-OFDM for UWB Systems | |
KUMARI et al. | Compare the Performance Analysis for HHT Based MIMOOFDM with DWT Based MIMO-OFDM |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020077001677 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 683/DELNP/2007 Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2005772190 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200580031524.6 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2005772190 Country of ref document: EP |