Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6473467
SERIAL NO

09539224

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Channel state information (CSI) can be used by a communications system to precondition transmissions between transmitter units and receiver units. In one aspect of the invention, disjoint sub-channel sets are assigned to transmit antennas located at a transmitter unit. Pilot symbols are generated and transmitted on a subset of the disjoint sub-channels. Upon receipt of the transmitted pilot symbols, the receiver units determine the CSI for the disjoint sub-channels that carried pilot symbols. These CSI values are reported to the transmitter unit, which will use these CSI values to generate CSI estimates for the disjoint sub-channels that did not carry pilot symbols. The amount of information necessary to report CSI on the reverse link can be further minimized through compression techniques and resource allocation techniques.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
QUALCOMM INCORPORATEDSAN DIEGO, CA20690

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jalali, Ahmad San Diego, CA 134 4174
Wallace, Mark Bedford, MA 70 6225
Walton, Jay R Westford, MA 44 5713

Cited Art Landscape

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ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (2)
7627050 Adaptive transmitting and receiving device and method in wireless communication system using frequency division duplexing 4 2004
* 2005/0135,497 Adaptive transmitting and receiving device and method in wireless communication system using frequency division duplexing 14 2004
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (36)
* 7099269 Methods and apparatus for generating and utilizing training codes in a space division multiplexing communication system 3 2001
* 2002/0118,635 Communication system 14 2001
* 7277493 Equalization in orthogonal frequency domain multiplexing 7 2003
* 2004/0146,123 Equalization in orthogonal frequency domain multiplexing 20 2003
7215934 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 4 2003
9325532 Method and apparatus for communicating symbols in a multiple input multiple output communication system using interleaved subcarriers across a plurality of antennas 0 2004
* 2007/0230,431 Methods and Apparatus for Backwards Compatible Communication in a Multiple Antenna Communication System Using Fmd-Based Preamble Structures 31 2004
* 2007/0060,073 Method and apparatus for communicating symbols in a multiple input multiple output communication system using interleaved subcarriers across a plurality of antennas 17 2004
* 2005/0124,340 Method and apparatus for access point selection using channel correlation in a wireless communication system 5 2004
* 7391832 System and method for channel bonding in multiple antenna communication systems 12 2004
* 2005/0105,632 System and method for channel bonding in multiple antenna communication systems 37 2004
* 7502408 RF transceiver having adaptive modulation 7 2005
* 2006/0239,366 RF transceiver having adaptive modulation 16 2005
* 2008/0232,239 Method and Apparatus for Communicating Orthogonal Pilot Tones in a Multiple Antenna Communication System 12 2005
* 2007/0058,694 Methods and apparatus for generating and utilizing training codes in a space division multiplexing communication system 4 2006
* 7978773 Multi-channel receiver with improved AGC 2 2006
* 2008/0159,446 Multi-channel receiver with improved AGC 7 2006
7822395 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 0 2007
7433659 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 2 2007
7433660 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 6 2007
7412218 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 2 2007
7392025 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 54 2007
* 2007/0258,354 ITERATIVE MULTI-STAGE DETECTION TECHNIQUE FOR A DIVERSITY RECEIVER HAVING MULTIPLE ANTENNA ELEMENTS 1 2007
7809343 Multi-channel receiver with improved AGC 5 2007
7769357 Multi-channel receiver with improved AGC 1 2007
* 2008/0267,326 Multi-channel receiver with improved AGC 5 2007
* 2008/0268,798 Multi-channel receiver with improved AGC 7 2007
8185075 System and method for channel bonding in multiple antenna communication systems 0 2008
8027650 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 0 2008
7917108 Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements 0 2008
* 2009/0111,403 ITERATIVE MULTI-STAGE DETECTION TECHNIQUE FOR A DIVERSITY RECEIVER HAVING MULTIPLE ANTENNA ELEMENTS 2 2008
* 2011/0211,508 ITERATIVE MULTI-STAGE DETECTION TECHNIQUE FOR A DIVERSITY RECEIVER HAVING MULTIPLE ANTENNA ELEMENTS 0 2011
* 8391384 Multi-channel receiver with improved AGC 0 2011
* 2011/0217,942 ITERATIVE MULTI-STAGE DETECTION TECHNIQUE FOR A DIVERSITY RECEIVER HAVING MULTIPLE ANTENNA ELEMENTS 0 2011
* 8284651 Preamble formats for MIMO wireless communications 1 2011
* 2011/0280,331 PREAMBLE FORMATS FOR MIMO WIRELESS COMMUNICATIONS 1 2011
 
CAMBIUM NETWORKS LIMITED (1)
* 2006/0160,495 Dual payload and adaptive modulation 19 2006
 
QUALCOMM INCORPORATED (232)
* 6771706 Method and apparatus for utilizing channel state information in a wireless communication system 214 2001
* 6785341 Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information 278 2001
* 2003/0035,491 Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information 116 2001
9130810 OFDM communications methods and apparatus 3 2001
* 2003/0125,040 Multiple-access multiple-input multiple-output (MIMO) communication system 440 2001
* 6760388 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 158 2001
* 2003/0108,117 Time-domain transmit and receive processing with channel eigen-mode decompositon for MIMO systems 37 2001
* 7197084 Precoding for a multipath channel in a MIMO system 77 2002
* 2003/0185,310 Precoding for a multipath channel in a MIMO system 71 2002
7184713 Rate control for multi-channel communication systems 99 2002
* 2003/0236,080 Rate control for multi-channel communication systems 50 2002
8194770 Coded MIMO systems with selective channel inversion applied per eigenmode 10 2002
* 6940917 Beam-steering and beam-forming for wideband MIMO/MISO systems 108 2002
* 2004/0042,439 Beam-steering and beam-forming for wideband MIMO/MISO systems 30 2002
* 7720093 Modulation multiplexing 0 2002
* 7095790 Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 6 2003
* 2004/0165,676 Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 11 2003
8218609 Closed-loop rate control for a multi-channel communication system 17 2003
7986742 Pilots for MIMO communication system 51 2003
* 7388845 Multiple access wireless communications system using a multisector configuration 34 2003
* 7133354 Synchronization techniques for a wireless system 14 2003
6985498 Beacon signaling in a wireless system 70 2003
* 2004/0095,904 Synchronization techniques for a wireless system 32 2003
* 2004/0095,902 Beacon signaling in a wireless system 42 2003
7366200 Beacon signaling in a wireless system 35 2003
* 2004/0109,432 Beacon signaling in a wireless system 29 2003
* 7305055 Search-efficient MIMO trellis decoder 3 2003
* 7418042 Repetition coding for a wireless system 16 2003
* 2005/0243,774 Repetition coding for a wireless system 10 2003
8320301 MIMO WLAN system 34 2003
8208364 MIMO system with multiple spatial multiplexing modes 25 2003
8169944 Random access for wireless multiple-access communication systems 17 2003
8170513 Data detection and demodulation for wireless communication systems 18 2003
8134976 Channel calibration for a time division duplexed communication system 19 2003
* 7248879 Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system 33 2003
9473269 Method and apparatus for providing an efficient control channel structure in a wireless communication system 0 2003
* 2004/0121,730 Transmission scheme for multi-carrier MIMO systems 28 2003
* 2005/0180,312 Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system 46 2004
7590182 Method and apparatus for utilizing channel state information in a wireless communication system 6 2004
* 2004/0165,558 Method and apparatus for utilizing channel state information in a wireless communication system 24 2004
* 7724838 Hierarchical coding with multiple antennas in a wireless communication system 30 2004
* 2005/0068,918 Hierarchical coding with multiple antennas in a wireless communication system 168 2004
8169889 Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system 16 2004
* 2010/0002,570 Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system 55 2004
* 2005/0195,733 Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system 93 2004
7116725 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 9 2004
* 2004/0234,004 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 5 2004
7978649 Unified MIMO transmission and reception 11 2004
7054378 Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information 42 2004
7411929 Method and apparatus for utilizing channel state information in a wireless communication system 5 2004
7616698 Multiple-input multiple output system and method 26 2004
8204149 Spatial spreading in a multi-antenna communication system 6 2004
9148256 Performance based rank prediction for MIMO design 1 2004
9137822 Efficient signaling over access channel 0 2004
8831115 MC-CDMA multiplexing in an orthogonal uplink 2 2004
8611283 Method and apparatus of using a single channel to provide acknowledgement and assignment messages 2 2004
8238923 Method of using shared resources in a communication system 6 2004
7978778 Receiver structures for spatial spreading with space-time or space-frequency transmit diversity 11 2005
* 2006/0050,770 Receiver structures for spatial spreading with space-time or space-frequency transmit diversity 91 2005
8570988 Channel calibration for a time division duplexed communication system 21 2005
8923785 Continuous beamforming for a MIMO-OFDM system 0 2005
* 7466667 Adaptive packet detection for detecting packets in a wireless medium 7 2005
* 2005/0190,786 Adaptive packet detection for detecting packets in a wireless medium 4 2005
8285226 Steering diversity for an OFDM-based multi-antenna communication system 7 2005
9520972 Pilot signal transmission for an orthogonal frequency division wireless communication system 0 2005
9143305 Pilot signal transmission for an orthogonal frequency division wireless communication system 1 2005
* 8446892 Channel structures for a quasi-orthogonal multiple-access communication system 33 2005
8085875 Incremental pilot insertion for channnel and interference estimation 26 2005
* 2006/0013,338 Incremental pilot insertion for channnel and interference estimation 19 2005
7751492 Multiplexing of real time services and non-real time services for OFDM systems 10 2005
* 7167684 Rate control for multi-channel communications systems 29 2005
* 7194040 Beam-steering and beam-forming for wideband MIMO/MISO systems 7 2005
* 2006/0104,381 Beam-steering and beam-forming for wideband MIMO/MISO systems 57 2005
9246560 Systems and methods for beamforming and rate control in a multi-input multi-output communication systems 1 2005
7623442 Signaling method in an OFDM multiple access system 39 2005
8358714 Coding and modulation for multiple data streams in a communication system 14 2005
9036538 Frequency hopping design for single carrier FDMA systems 0 2005
7894548 Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system 10 2005
* 2006/0067,421 Spatial spreading with space-time and space-frequency transmit diversity schemes for a wireless communication system 105 2005
9154211 Systems and methods for beamforming feedback in multi antenna communication systems 0 2005
8934329 Transmit diversity processing for a multi-antenna communication system 1 2005
9461859 Pilot signal transmission for an orthogonal frequency division wireless communication system 0 2005
9408220 Channel quality reporting for adaptive sectorization 0 2005
9225416 Varied signaling channels for a reverse link in a wireless communication system 1 2005
9225488 Shared signaling channel 0 2005
9209956 Segment sensitive scheduling 0 2005
9210651 Method and apparatus for bootstraping information in a communication system 1 2005
9184870 Systems and methods for control channel signaling 0 2005
9179319 Adaptive sectorization in cellular systems 0 2005
9172453 Method and apparatus for pre-coding frequency division duplexing system 0 2005
8693405 SDMA resource management 4 2005
8644292 Varied transmission time intervals for wireless communication system 4 2005
8582509 Scalable frequency band operation in wireless communication systems 14 2005
8565194 Puncturing signaling channel for a wireless communication system 11 2005
8045512 Scalable frequency band operation in wireless communication systems 30 2005
7664193 Multiplexing of real time services and non-real time services for OFDM systems 37 2005
7813441 Multiplexing of real time services and non-real time services for OFDM systems 29 2005
* 2006/0093,067 Multiplexing of real time services and non-real time services for OFDM systems 51 2005
7715845 Tone hopping methods and apparatus 6 2005
8582548 Frequency division multiple access schemes for wireless communication 12 2006
7636573 Multiple-access multiple-input multiple-output (MIMO) communication system 90 2006
9144060 Resource allocation for shared signaling channels 0 2006
8879511 Assignment acknowledgement for a wireless communication system 7 2006
8611284 Use of supplemental assignments to decrement resources 2 2006
9136974 Precoding and SDMA support 0 2006
8724555 Uplink pilot and signaling transmission in wireless communication systems 1 2006
8885628 Code division multiplexing in a single-carrier frequency division multiple access system 19 2006
8462859 Sphere decoding apparatus 38 2006
8599945 Robust rank prediction for a MIMO system 8 2006
* 8005171 Systems and method for generating a common preamble for use in a wireless communication system 1 2006
* 8543070 Reduced complexity beam-steered MIMO OFDM system 4 2006
* 2007/0249,296 Reduced complexity beam-steered MIMO OFDM system 56 2006
8351405 Method and apparatus for signaling beacons in a communication system 0 2006
* 2008/0013,479 Method and apparatus for signaling beacons in a communication system 7 2006
7606326 Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 0 2006
7430245 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 5 2006
* 2006/0274,849 Time-domain transmit and receive processing with channel eigen-mode decomposition for MIMO systems 7 2006
* 2006/0269,009 Transmission schemes for multi-antenna communication systems utilizing multi-carrier modulation 4 2006
9088384 Pilot symbol transmission in wireless communication systems 0 2006
7991065 Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system 9 2006
* 8320352 Robust transmission scheme for wireless networks 2 2007
8059609 Resource allocation to support single-user and multi-user MIMO transmission 4 2007
* 2007/0223,422 RESOURCE ALLOCATION TO SUPPORT SINGLE-USER AND MULTI-USER MIMO TRANSMISSION 80 2007
8290089 Derivation and feedback of transmit steering matrix 9 2007
7907972 Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system 70 2007
7907689 Broadcast transmission with spatial spreading in a multi-antenna communication system 10 2007
7899131 Broadcast transmission with spatial spreading in a multi-antenna communication system 7 2007
* 2008/0031,374 BROADCAST TRANSMISSION WITH SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM 21 2007
* 2008/0031,372 BROADCAST TRANSMISSION WITH SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM 20 2007
8145179 Data detection and demodulation for wireless communication systems 18 2007
* 2008/0063,099 SIGNALING METHOD IN AN OFDM MULTIPLE ACCESS SYSTEM 55 2007
7668267 Search efficient MIMO trellis decoder 0 2007
* 2008/0063,104 SEARCH EFFICIENT MIMO TRELLIS DECODER 9 2007
8477684 Acknowledgement of control messages in a wireless communication system 30 2007
8203978 Multi-mode terminal in a wireless MIMO system 27 2007
7764754 Data transmission with spatial spreading in a MIMO communication system 8 2007
* 8369356 Dynamic management of receiver resources 0 2008
* 2008/0232,400 DYNAMIC MANAGEMENT OF RECEIVER RESOURCES 5 2008
* 2008/0225,792 MULTIPLEXING OF FEEDBACK CHANNELS IN A WIRELESS COMMUNICATION SYSTEM 14 2008
8619698 Enhanced beacon signaling method and apparatus 0 2008
* 2008/0192,690 ENHANCED BEACON SIGNALING METHOD AND APPARATUS 1 2008
9240871 MIMO WLAN system 1 2008
8913529 MIMO WLAN system 2 2008
8483188 MIMO system with multiple spatial multiplexing modes 29 2008
8355313 MIMO system with multiple spatial multiplexing modes 11 2008
7995527 Multiple access wireless communications system using a multi-sector configuration 10 2008
* 2008/0291,856 MULTIPLE ACCESS WIRELESS COMMUNICATIONS SYSTEM USING A MULTI-SECTOR CONFIGURATION 24 2008
8014271 Signaling method in an OFDM multiple access system 32 2008
8462643 MIMO WLAN system 62 2008
* 2008/0273,617 STEERING DIVERSITY FOR AN OFDM-BASED MULTI-ANTENNA COMMUNICATION SYSTEM 18 2008
8199842 Time-domain transmit and receive processing with channel EIGEN-mode decomposition for MIMO systems 0 2008
* 2008/0317,158 TIME-DOMAIN TRANSMIT AND RECEIVE PROCESSING WITH CHANNEL EIGEN-MODE DECOMPOSITION FOR MIMO SYSTEMS 12 2008
8855226 Rate selection with margin sharing 5 2008
9246659 Segment sensitive scheduling 0 2009
9240877 Segment sensitive scheduling 1 2009
8787347 Varied transmission time intervals for wireless communication system 5 2009
8098568 Signaling method in an OFDM multiple access system 61 2009
8098569 Signaling method in an OFDM multiple access system 44 2009
8457232 Detecting the number of transmit antennas in wireless communication systems 3 2009
* 2009/0238,299 Detecting the Number of Transmit Antennas in Wireless Communication Systems 6 2009
8873365 Transmit diversity processing for a multi-antenna communication system 2 2009
8909174 Continuous beamforming for a MIMO-OFDM system 2 2009
* 2009/0290,657 Continuous Beamforming for a MIMO-OFDM System 13 2009
8767701 Unified MIMO transmission and reception 2 2009
* 2010/0074,301 UNIFIED MIMO TRANSMISSION AND RECEPTION 37 2009
8743837 Modified preamble structure for IEEE 802.11A extensions to allow for coexistence and interoperability between 802.11A devices and higher data rate, MIMO or otherwise extended devices 2 2009
* 2010/0061,402 MODIFIED PREAMBLE STRUCTURE FOR IEEE 802.11A EXTENSIONS TO ALLOW FOR COEXISTENCE AND INTEROPERABILITY BETWEEN 802.11A DEVICES AND HIGHER DATA RATE, MIMO OR OTHERWISE EXTENDED DEVICES 10 2009
7949060 Method and apparatus for utilizing channel state information in a wireless communication system 21 2009
* 2010/0003,931 TRANSMISSION SCHEMES FOR MULTI-ANTENNA COMMUNICATION SYSTEMS UTILIZING MULTI-CARRIER MODULATION 2 2009
8073072 Multiple-input multiple-output system and method 3 2009
9031097 MIMO system with multiple spatial multiplexing modes 0 2009
8194776 Multiplexing of real time services and non-real time services for OFDM systems 7 2010
7990843 Signaling method in an OFDM multiple access system 50 2010
7990844 Signaling method in an OFDM multiple access system 49 2010
7924699 Signaling method in an OFDM multiple access system 50 2010
7916624 Signaling method in an OFDM multiple access system 50 2010
8542765 Hierarchical coding with multiple antennas in a wireless communication system 1 2010
* 2010/0220,708 HIERARCHICAL CODING WITH MULTIPLE ANTENNAS IN A WIRELESS COMMUNICATION SYSTEM 20 2010
8547951 Channel structures for a quasi-orthogonal multiple-access communication system 8 2010
8325844 Data transmission with spatial spreading in a MIMO communication system 35 2010
* 2011/0142,097 DATA TRANSMISSION WITH SPATIAL SPREADING IN A MIMO COMMUNICATION SYSTEM 25 2010
8644214 Timing synchronization and channel estimation at a transition between local and wide area waveforms using a designated TDM pilot 0 2010
8903440 Distributed hierarchical scheduling in an ad hoc network 0 2010
8817897 MC-CDMA multiplexing in an orthogonal uplink 1 2010
8681764 Frequency division multiple access schemes for wireless communication 2 2010
8489107 Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system 0 2011
8611457 Modified preamble structure for IEEE 802.11A extensions to allow for coexistence and interoperability between 802.11A devices and higher data rate, MIMO or otherwise extended devices 0 2011
8649451 MC-CDMA multiplexing in an orthogonal uplink 2 2011
9312935 Pilots for MIMO communication systems 1 2011
8295154 Signaling method in an OFDM multiple access system 24 2011
8223627 Signaling method in an OFDM multiple access system 32 2011
8218425 Signaling method in an OFDM multiple access system 33 2011
8199634 Signaling method in an OFDM multiple access system 31 2011
8842619 Scalable frequency band operation in wireless communication systems 1 2011
8913479 Flexible time-frequency multiplexing structure for wireless communication 0 2011
9660776 Method and apparatus for providing antenna diversity in a wireless communication system 0 2011
8599953 Multiple-input multiple-output system and method 0 2011
8917654 Frequency hopping design for single carrier FDMA systems 1 2011
8638870 MC-CDMA multiplexing in an orthogonal uplink 2 2011
8711763 Random access for wireless multiple-access communication systems 2 2012
8923421 Repetition coding for a wireless system 0 2012
* 8320354 Robust transmission scheme for wireless networks 2 2012
* 2012/0127,985 ROBUST TRANSMISSION SCHEME FOR WIRELESS NETWORKS 2 2012
8750151 Channel calibration for a time division duplexed communication system 5 2012
9198194 Scheduling with reverse direction grant in wireless communication systems 0 2012
8520498 Transmit diversity and spatial spreading for an OFDM-based multi-antenna communication system 6 2012
8903016 Spatial spreading in a multi-antenna communication system 1 2012
9072101 High speed media access control and direct link protocol 1 2012
8774098 Method, apparatus, and system for multiplexing protocol data units 1 2012
9426012 Signaling method in an OFDM multiple access system 1 2012
9226308 Method, apparatus, and system for medium access control 0 2012
8989294 Multiple-input multiple-output system and method 1 2013
8824583 Reduced complexity beam-steered MIMO OFDM system 2 2013
9307544 Channel quality reporting for adaptive sectorization 0 2013
9048892 MIMO system with multiple spatial multiplexing modes 1 2013
* 9736849 Method and apparatus for managing client initiated transmissions in multiple-user communication schemes 0 2013
* 2013/0223,382 METHOD AND APPARATUS FOR MANAGING CLIENT INITIATED TRANSMISSIONS IN MULTIPLE-USER COMMUNICATION SCHEMES 0 2013
9154274 OFDM communication system with multiple OFDM symbol sizes 0 2013
9137087 High speed media access control 0 2013
9125078 Method and apparatus for setting reverse link CQI reporting modes in wireless communication system 0 2013
9668206 Multiplexing and transmission of multiple data streams in a wireless multi-carrier communication system 0 2013
8971823 Precoding for segment sensitive scheduling in wireless communication systems 0 2013
9155106 Uplink pilot and signaling transmission in wireless communication systems 1 2014
9407418 Channelizing packet acknowledgments for multiple data channels in wireless communication 0 2014
9350514 Sending full channel quality indication reports on TDM channel in wireless communication 0 2014
9319201 Reverse link pilot with selective gating in wireless communication 0 2014
9013974 MIMO WLAN system 4 2014
9693339 Code division multiplexing in a single-carrier frequency division multiple access system 0 2014
9787375 Spatial spreading in a multi-antenna communication system 0 2014
9480074 Enabling quick and easy demodulation 0 2014
9197374 Repetition coding for a wireless system 0 2014
9755807 Uplink channel estimation using a signaling channel 0 2015
 
SNAPTRACK, INC. (4)
7948960 Radio transmission device 6 2005
* 2007/0202,818 Radio Transmission Device 16 2005
8422478 Radio transmission device 0 2010
8416757 Radio transmission device 0 2011
 
KAON SYSTEMS, INC. (14)
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6947748 OFDMA with adaptive subcarrier-cluster configuration and selective loading 128 2000
* 2002/0119,781 OFDMA with adaptive subcarrier-cluster configuration and selective loading 86 2000
7146172 Multi-carrier communications with adaptive cluster configuration and switching 90 2001
6904283 Multi-carrier communications with group-based subcarrier allocation 202 2001
* 2003/0169,681 Multi-carrier communications with group-based subcarrier allocation 87 2001
* 2002/0147,017 Multi-carrier communications with adaptive cluster configuration and switching 84 2001
7355962 Multi-carrier communications with group-based subcarrier allocation 29 2005
* 2005/0220,002 Multi-carrier communications with group-based subcarrier allocation 37 2005
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* 2006/0083,210 OFDMA with adaptive subcarrier-cluster configuration and selective loading 35 2005
7379742 Multi-carrier communications with adaptive cluster configuration and switching 26 2006
7573850 Multi-carrier communications with group-based subcarrier allocation 23 2007
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ALCATEL LUCENT (3)
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ALCATEL-LUCENT USA INC. (1)
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6996380 Communication system employing transmit macro-diversity 37 2001
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GOLDPEAK INNOVATIONS INC (2)
8787216 Apparatus and method for allocating channel state information-reference signal in wireless communication system 4 2011
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XIEON NETWORKS S.A.R.L. (2)
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MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (6)
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* 2003/0008,623 Receiving Apparatus and Transmitting Apparatus 4 2002
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* 2008/0273,609 RECEIVING APPARATUS, TRANSMITTING APPARATUS, AND RECEPTION METHOD 4 2007
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WITCOM LTD. (1)
* 2004/0259,556 Wireless network with intensive frequency reuse 48 2004
 
AT&T CORP. (4)
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* 2009/0003,489 Clustered OFDM with channel estimation 1 2008
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* Cited By Examiner