发明名称 |
Space time transmit diversity with subgroup rate control and subgroup antenna selection in multi-input multi-output communications systems |
摘要 |
A method and system transmits an input stream of data symbols in a multiple-input/multiple-output wireless communications system that includes M subgroups of transmitting antennas. A stream of data symbols is provided to a combined switch and demultiplexer. The combined switch and demultiplexer selects a subset L of the M subgroups of antennas as active, where L<M. The demultiplexer then splits the data stream into L substreams, which are fed to the L subgroups of antennas. Before transmission, each of the L substreams is adaptively modulated and coded to a maximum data rate while achieving a predetermined performance on an associated channel used to transmit the substream. Space-time transmit diversity encoding is applied to each coded substream to generate multiple output streams, one output stream for each antenna of each of the L subgroups. The selection by the switch is based on channel conditions fed back by a receiver of the output streams.
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申请公布号 |
US2004196919(A1) |
申请公布日期 |
2004.10.07 |
申请号 |
US20040828626 |
申请日期 |
2004.04.21 |
申请人 |
MEHTA NEELESH B.;SUDARSHAN PALLAV;MOLISCH ANDREAS F.;ZHANG JINYUN |
发明人 |
MEHTA NEELESH B.;SUDARSHAN PALLAV;MOLISCH ANDREAS F.;ZHANG JINYUN |
分类号 |
H04J99/00;H04B7/02;H04B7/06;H04L1/00;H04L1/06;(IPC1-7):H04L1/02 |
主分类号 |
H04J99/00 |
代理机构 |
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地址 |
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