公开(公告)号：EP2020134B1

公开(公告)日：2019-06-19

申请号：EP07762294.2

申请日：2007-05-22

申请人： QUALCOMM Incorporated

发明人： WALLACE, Mark, S. ,  KETCHUM, John, W. ,  WALTON, Jay, Rodney ,  HOWARD, Steven, J.

IPC分类号： H04L27/26

公开(公告)号：EP1712029B1

公开(公告)日：2017-10-04

申请号：EP05711350.8

申请日：2005-01-11

申请人： Qualcomm, Incorporated

发明人： WALTON, Jay, Rodney ,  KETCHUM, John, W. ,  WALLACE, Mark, S. ,  HOWARD, Steven, J.

IPC分类号： H04B7/0417 ,  H04B7/06 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06

CPC分类号： H04J11/003 ,  C07K2317/22 ,  C07K2317/622 ,  H04B7/0417 ,  H04B7/0626 ,  H04L1/0026 ,  H04L1/06

公开(公告)号：EP1556983B1

公开(公告)日：2013-06-05

申请号：EP03779264.5

申请日：2003-10-27

申请人： Qualcomm, Incorporated

发明人： WALTON, Rodney, J. ,  KETCHUM, John, W. ,  WALLACE, Mark ,  HOWARD, Steven, J.

IPC分类号： H04L1/00 ,  H04L1/06 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04B7/06 ,  H04B7/08

CPC分类号： H04L27/261 ,  H04B7/0669 ,  H04B7/0697 ,  H04B7/0854 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0017 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/0618 ,  H04L1/08 ,  H04L1/16 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/0242 ,  H04L25/03343 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/2647 ,  H04L2001/0093 ,  H04W28/20 ,  H04W52/50

公开(公告)号：EP1680897B1

公开(公告)日：2010-03-10

申请号：EP04795249.4

申请日：2004-10-15

申请人： QUALCOMM INCORPORATED

发明人： KETCHUM, John, W. ,  WALLACE, Mark, S. ,  WALTON, Rodney, J. ,  NANDA, Sanjiv

IPC分类号： H04L12/56 ,  H04L29/06

CPC分类号： H04L29/06 ,  H04L69/32 ,  H04L69/324 ,  H04L69/325

公开(公告)号：EP1576733B1

公开(公告)日：2008-10-15

申请号：EP03783405.8

申请日：2003-11-12

申请人： QUALCOMM INCORPORATED

发明人： BJERKE, Bjorn ,  KETCHUM, John, W. ,  SINDHUSHAYANA, Nagabhushana ,  WALTON, Jay, Rod

IPC分类号： H03M13/00

CPC分类号： H04L1/0057 ,  H03M13/11 ,  H03M13/6393

公开(公告)号：EP1685660A1

公开(公告)日：2006-08-02

申请号：EP04810873.2

申请日：2004-11-12

申请人： QUALCOMM INCORPORATED

发明人： WALTON, J., Rodney ,  KETCHUM, John, W. ,  SMEE, John, Edward ,  WALLACE, Mark, S. ,  HOWARD, Steven, J.

IPC分类号： H04B7/04 ,  H04B7/06 ,  H04Q7/36 ,  H04L5/02

CPC分类号： H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An "effective" uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.

公开(公告)号：EP1678865A1

公开(公告)日：2006-07-12

申请号：EP04785304.9

申请日：2004-09-29

申请人： QUALCOMM INCORPORATED

发明人： KETCHUM, John, W. ,  WALLACE, Mark, S. ,  WALTON, J., Rodney ,  HOWARD, Steven, J.

IPC分类号： H04L1/06 ,  H04B7/08 ,  H04B7/06

CPC分类号： H04B7/0417 ,  H04B7/0854 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/06 ,  H04L25/0206 ,  H04L27/2601

摘要： For eigenmode transmission with minimum mean square error (MMSE) receiver spatial processing, a transmitter performs spatial processing on NS data symbol streams with steering vectors to transmit the streams on NS spatial channels of a MIMO channel. The steering vectors are estimates of transmitter steering vectors required to orthogonalize the spatial channels. A receiver derives a spatial filter based on an MMSE criterion and with an estimate of the MIMO channel response and the steering vectors. The receiver (1) obtains NR received symbol streams from NR receive antennas, (2) performs spatial processing on the received symbol streams with the spatial filter to obtain NS filtered symbol streams, (3) performs signal scaling on the filtered symbol streams with a scaling matrix to obtain NS recovered symbol streams, and (4) processes the NS recovered symbol streams to obtain NS decoded data streams for the NS data streams sent by the transmitter.

公开(公告)号：EP1488585A2

公开(公告)日：2004-12-22

申请号：EP03719445.3

申请日：2003-03-19

申请人： Qualcomm, Incorporated

发明人： KETCHUM, John, W. ,  BJERKE, Bjorn, A.

IPC分类号： H04L25/03 ,  H04B7/06

CPC分类号： H04B7/0413 ,  H04B7/005 ,  H04B7/043 ,  H04B7/0443 ,  H04B7/0626 ,  H04L25/03057 ,  H04L25/03343

摘要： Techniques for precoding data for a multipath channel in a MIMO system. In one method, data is coded in accordance with one or more coding schemes to provide coded data, which is further modulated (i.e., symbol mapped) in accordance with one or more modulation schemes to provide modulation symbols. An estimated response of the MIMO channel is obtained (e.g., provided by a receiver), and an equivalent channel response is derived based on the estimated MIMO channel response and a response of a feed-forward filter of a decision feedback equalizer. The modulation symbols are then precoded based on the equivalent channel response to provide precoded symbols, which are further preconditioned based on the estimated MIMO channel response (e.g., using spatio-temporal pulse-shaping) to provide preconditioned symbols for transmission over the MIMO channel. The feed-forward filter may be adapted based on a minimum mean square error (MMSE) criterion.

公开(公告)号：EP1371147A2

公开(公告)日：2003-12-17

申请号：EP02753807.3

申请日：2002-03-22

申请人： QUALCOMM INCORPORATED

发明人： LING, Funyun ,  WALTON, Jay, R. ,  HOWARD, Steven, J. ,  WALLACE, Mark ,  KETCHUM, John, W.

IPC分类号： H04B7/00

CPC分类号： H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0854 ,  H04B7/0891 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0026 ,  H04L5/0023 ,  H04L5/0044 ,  H04L5/006 ,  H04L5/0091 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/0248 ,  H04L25/03159 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Techniques for transmitting data from a transmitter unit to a receiver unit in a multiple-input multiple-output (MIMO) communication system. In one method, at the receiver unit, a number of signals are received via a number of receive antennas, with the received signal from the transmitter unit. The received signals are processed to derive channel state information (CSI) indicative of characteristics of a number of transmission channels used for data transmission. The CSI is transmitted back to the transmitter unit. At the transmitter unit, the CSI from the receiver unit is received and data for transmission to the receiver units is processed based on the received CSI.

公开(公告)号：EP2460293A1

公开(公告)日：2012-06-06

申请号：EP09752593.5

申请日：2009-10-30

申请人： Qualcomm Incorporated

发明人： KETCHUM, John, W. ,  NAGARAJ, Srinath ,  BHATIA, Ashok ,  KATZFEY, Eric, J. ,  DAITA, Lalitaprasad, V. ,  BARUAH, Sekharjyoti

IPC分类号： H04J3/06 ,  H04W64/00 ,  H04W84/00

CPC分类号： H04J3/0688 ,  H04W56/0035 ,  H04W64/003 ,  H04W84/045

摘要： Devices and methods are provided for providing self-timing and self-locating in an access point (AP) base station. In one embodiment, the method involves receiving Satellite Positioning System (SPS) signals from a first data source (e.g., plurality of satellites), wherein the SPS signals may include SPS time data, SPS frequency data, and SPS position data. The method may further involve obtaining from a second data source (e.g., cell site, terrestrial navigation station, server, user input interface, etc.) at least one of second time data, second frequency data and second position data, and determining relative reliability of the first and second data sources.