US Patent No: 6,473,467

Number of patents in Portfolio can not be more than 2000

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

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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, CA10772

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jalali, Ahmad San Diego, CA 137 2449
Wallace, Mark Bedford, MA 94 3240
Walton, Jay R Westford, MA 67 2856

Cited Art Landscape

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (110)
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6,940,917 Beam-steering and beam-forming for wideband MIMO/MISO systems 68 2002
7,720,093 Modulation multiplexing 0 2002
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8,218,609 Closed-loop rate control for a multi-channel communication system 4 2003
7,986,742 Pilots for MIMO communication system 9 2003
7,388,845 Multiple access wireless communications system using a multisector configuration 11 2003
7,133,354 Synchronization techniques for a wireless system 11 2003
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7,366,200 Beacon signaling in a wireless system 12 2003
7,305,055 Search-efficient MIMO trellis decoder 3 2003
7,418,042 Repetition coding for a wireless system 5 2003
8,320,301 MIMO WLAN system 2 2003
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8,462,643 MIMO WLAN system 2 2008
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7,949,060 Method and apparatus for utilizing channel state information in a wireless communication system 5 2009
8,073,072 Multiple-input multiple-output system and method 1 2009
8,194,776 Multiplexing of real time services and non-real time services for OFDM systems 1 2010
7,990,843 Signaling method in an OFDM multiple access system 18 2010
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8,542,765 Hierarchical coding with multiple antennas in a wireless communication system 1 2010
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8,325,844 Data transmission with spatial spreading in a MIMO communication system 10 2010
8,644,214 Timing synchronization and channel estimation at a transition between local and wide area waveforms using a designated TDM pilot 0 2010
8,681,764 Frequency division multiple access schemes for wireless communication 0 2010
8,489,107 Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system 0 2011
8,611,457 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
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7,706,458 Time and frequency synchronization in Multi-Input, Multi-Output (MIMO) systems 7 2006
 
FUJITSU LIMITED (3)
7,386,058 Transceiver apparatus and transceiving method 16 2005
8,116,241 Wireless communication system and transmission device 1 2005
8,345,641 Radio communication system using multi-antenna transmission technique, and multi-user scheduler therefor 0 2008
 
NTT DOCOMO, INC. (3)
7,646,747 Channel constructing method and base station using the method 5 2001
7,899,029 Mobile communication system, user equipment in mobile communication system, control program thereof, and synchronization establishment determination method in mobile communication system 0 2007
8,630,244 Channel structuring method and base station therewith 0 2009
 
OPTIS WIRELESS TECHNOLOGY, LLC (3)
6,754,253 Receiver architecture for transmit diversity in CDMA system 17 2000
7,974,371 Communication method and radio communication apparatus 1 2002
8,428,182 Communication method and radio communication apparatus 0 2011
 
PEGASYSTEMS INC. (3)
8,335,704 Methods and apparatus for work management and routing 3 2005
8,250,525 Proactive performance management for multi-user enterprise software systems 3 2007
8,479,157 Methods and apparatus for integration of declarative rule-based processing with procedural programming in a digital data-processing evironment 0 2009
 
RESEARCH IN MOTION LIMITED (3)
7,529,305 Combination of space-time coding and spatial multiplexing, and the use of orthogonal transformation in space-time coding 2 2000
6,980,600 Receiver system for Multiple-Transmit, Multiple-Receive (MTMR) wireless communications systems 9 2000
7,508,798 Virtual mimo communication system 6 2002
 
SHARP KABUSHIKI KAISHA (3)
7,948,960 Radio transmission device 5 2005
8,422,478 Radio transmission device 0 2010
8,416,757 Radio transmission device 0 2011
 
SONY CORPORATION (3)
8,098,754 Midamble allocations for MIMO transmissions 0 2005
8,090,053 Midamble allocations for MIMO transmissions 0 2010
8,085,864 Midamble allocations for MIMO transmissions 0 2010
 
TEXAS INSTRUMENTS INCORPORATED (3)
7,929,631 Multiple space time transmit diversity communication system with selected complex conjugate inputs 0 2002
6,917,311 Orthogonal preamble encoder, method of encoding orthogonal preambles and multiple-input, multiple-output communication system employing the same 18 2003
7,660,229 Pilot design and channel estimation 12 2006
 
VIA TELECOM CO., LTD. (3)
7,180,956 Method and apparatus for applying overlaid perturbation vectors for gradient feedback transmit antenna array adaptation 13 2002
7,433,416 Method and apparatus for generating transmit adaptive antenna weights with nulling using binary gradient feedback 8 2002
7,236,538 Method and apparatus for improving transmit antenna weight tracking using channel correlations in a wireless communication system 13 2002
 
AGERE SYSTEMS LLC (2)
7,978,773 Multi-channel receiver with improved AGC 2 2006
8,391,384 Multi-channel receiver with improved AGC 0 2011
 
ALCATEL LUCENT (2)
8,165,246 Training sequence for low latency LMS implementation 0 2000
8,634,481 Feedback technique for wireless systems with multiple transmit and receive antennas 0 2000
 
AT&T CORP. (2)
7,369,487 Clustered OFDM with channel estimation 2 2004
7,792,500 Rate-adaptive multiple input/multiple output (MIMO) systems 2 2008
 
CISCO TECHNOLOGY, INC. (2)
7,352,688 High data rate wireless bridging 25 2002
8,374,105 High data rate wireless bridging 0 2008
 
COMCAST CABLE COMMUNICATIONS, LLC (2)
8,451,928 Apparatus for calculating weights associated with a first signal and applying the weights to a second signal 1 2011
8,451,929 Apparatus for calculating weights associated with a received signal and applying the weights to transmit data 2 2011
 
HUGHES ELECTRONICS CORPORATION (2)
6,678,263 Method and constructions for space-time codes for PSK constellations for spatial diversity in multiple-element antenna systems 55 1999
6,898,248 System employing threaded space-time architecture for transporting symbols and receivers for multi-user detection and decoding of symbols 35 2000
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
7,035,354 CDMA multi-user detection with a real symbol constellation 17 2001
7,161,975 Enhancing CDMA multiuser detection by constraining soft decisions 0 2002
 
LG ELECTRONICS INC. (2)
7,116,702 Signal processing method and apparatus in CDMA radio communication system 3 2002
7,751,352 Control signal transmitting method in multi-antenna system 3 2004
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
7,366,249 Method for transmitting optimally interleaved data in a MIMO telecommunication system 5 2004
7,376,203 Method for transmitting uniformly distributed data in a MIMO telecommunication system 1 2005
 
NUTTER MCCLENNEN & FISH LLP (2)
8,412,720 Methods and apparatus for querying a relational data store using schema-less queries 0 2007
7,831,604 Methods and apparatus for enterprise application integration 3 2007
 
THE DIRECTV GROUP, INC. (2)
7,342,875 Space-time coded OFDM system for MMDS applications 10 2001
8,374,272 Space-time coded OFDM system for MMDS applications 0 2008
 
UNWIRED PLANET, LLC (2)
7,209,511 Interference cancellation in a CDMA receiving system 10 2001
7,197,282 Mobile station loop-back signal processing 37 2002
 
AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH (1)
7,970,064 Transmitter, method for generating a plurality of long preambles and communication device 0 2005
 
AMOSMET INVESTMENTS LLC (1)
7,310,537 Communication on multiple beams between stations 1 2003
 
CIENA CORPORATION (1)
7,124,369 Multi-layer path explorer 4 2002
 
DSP GROUP INC. (1)
7,173,990 Joint equalization, soft-demapping and phase error correction in wireless system with receive diversity 13 2002
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
7,627,050 Adaptive transmitting and receiving device and method in wireless communication system using frequency division duplexing 3 2004
 
ERICSSON INC. (1)
6,996,380 Communication system employing transmit macro-diversity 23 2001
 
FLARLON TECHNOLOGIES, INC. (1)
7,379,446 Enhanced beacon signaling method and apparatus 5 2004
 
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. (1)
8,031,796 Device, method and computer program for transmitting an information signal comprising several transmit signals 0 2006
 
GEORGIA TECH RESEARCH CORPORATION (1)
7,668,266 Crest factor reduction in OFDM using blind selected pilot tone modulation 1 2006
 
GIGASET COMMUNICATIONS GMBH (1)
7,688,797 Method and transmission device for transmission of data in a multi-carrier system 6 2003
 
Hollywood Engineering, Inc. (1)
7,751,368 Providing CQI feedback to a transmitter station in a closed-loop MIMO system 11 2006
 
ILLINOIS INSTITUTE OF TECHNOLOGY (1)
7,385,617 Methods for multi-user broadband wireless channel estimation 18 2003
 
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE (1)
8,184,726 Method and apparatus for multi-rate control in a multi-channel communication system 3 2008
 
INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY (1)
7,848,296 Apparatus and method for generating channel information and apparatus and method for adaptive transmission employing the same 0 2006
 
INVENTERGY, INC. (1)
8,238,226 OFDM communication apparatus 1 2009
 
KABUSHIKI KAISHA TOSHIBA (1)
8,054,899 Terminal apparatus, base station and communication method 0 2008
 
MARVELL INTERNATIONAL LTD. (1)
7,606,316 MIMO-OFDM preamble for channel estimation 3 2003
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
7,158,494 Multi-mode communications transmitter 29 2001
 
METATOMIX, INC. (1)
7,640,239 Methods and apparatus for real-time business visibility using persistent schema-less data storage 0 2005
 
MOTOROLA, INC. (1)
7,656,969 Dual payload and adaptive modulation 1 2006
 
NEC CORPORATION (1)
8,265,675 MIMO wireless communication system and method by a plurality of base stations and mobile station 0 2008
 
NOKIA MOBILE PHONES LTD. (1)
6,778,839 Method and device for transmission power selection and bit rate selection for channels with open loop power control 12 2001
 
PACE PLC (1)
6,968,154 Avoidance of interference between items of electrical apparatus 0 2002
 
PULSE-LING, INC. (1)
8,045,935 High data rate transmitter and receiver 3 2005
 
RAMOT AT TEL-AVIV UNIVERSITY LTD. (1)
7,630,349 Antenna division multiple access 3 2005
 
REGENTS OF THE UNIVERSITY OF MINNESOTA (1)
7,224,744 Space-time multipath coding schemes for wireless communication systems 9 2003
 
RIM SEMICONDUCTOR COMPANY (1)
7,280,469 Efficient implementation of large size FFT 0 2001
 
SANYO ELECTRIC CO., LTD. (1)
8,380,141 Radio apparatus 0 2011
 
SONY MOBILE COMMUNICATIONS AB (1)
6,996,375 Transmit diversity and separating multiple loopback signals 18 2003
 
TQ DELTA, LLC (1)
8,634,449 Systems and methods for establishing a diagnostic transmission mode and communicating over the same 0 2011
 
UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC. (1)
7,110,350 Wireless LAN compatible multi-input multi-output system 24 2004
 
VOCALCOMM GROUP, LLC (1)
7,782,981 Signal processing apparatus and method 0 2004

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