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Space time transmit diversity with subgroup rate control and subgroup antenna selection in multi-input multi-output communications systems
Space time transmit diversity with subgroup rate control and subgroup antenna selection in multi-input multi-output communications systems
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机译:多输入多输出通信系统中具有子组速率控制和子组天线选择的时空发射分集
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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 LM. 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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