发明名称 |
TIME-DOMAIN TRANSMIT AND RECEIVE PROCESSING USING SINGULAR VALUE DECOMPOSITION FOR MIMO SYSTEMS |
摘要 |
Techniques for processing a data transmission at the transmitter and receiver. In an aspect, a time-domain implementation is provided which uses frequency-domain singular value decomposition and "water-pouring" results to derive time-domain pulse-shaping and beam-steering solutions at the transmitter and receiver. The singular value decomposition is performed at the transmitter to determine eigen-modes (i.e., spatial subchannels) of the MIMO channel and to derive a first set of steering vectors used to "precondition" modulation symbols. The singular value decomposition is also performed at the receiver to derive a second set of steering vectors used to precondition the received signals such that orthogonal symbol streams are recovered at the receiver, which can simplify the receiver processing. Water-pouring analysis is used to more optimally allocate the total available transmit power to the eigen-modes, which then determines the data rate and the coding and modulation scheme to be used for each eigen-mode. |
申请公布号 |
WO03050968(A3) |
申请公布日期 |
2003.10.16 |
申请号 |
WO2002US38671 |
申请日期 |
2002.12.03 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
KETCHUM, JOHN, W.;WALLACE, MARK;HOWARD, STEVEN, J.;WALTON, JAY, R. |
分类号 |
H04J99/00;H04B7/04;H04L1/00;H04L25/03;H04L27/26 |
主分类号 |
H04J99/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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