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Multiple-antenna communication systems and methods for communicating in wireless local area networks that include single-antenna communication devices
Multiple-antenna communication systems and methods for communicating in wireless local area networks that include single-antenna communication devices
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机译:用于在包括单天线通信设备的无线局域网中进行通信的多天线通信系统和方法
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摘要
In a wireless local area network (WLAN) that includes high-throughput communication devices with multiple antennas and legacy communication devices with single antennas, training tones are transmitted over a plurality of spatial channels during a first portion of an orthogonal frequency division multiplexed (OFDM) packet-training preamble. The training tones are interspersed among subcarrier frequencies of the spatial channels. The training tones are retransmitted during a second portion of the packet-training preamble. The training tones are shifted among the subcarrier frequencies of the spatial channels during the retransmission allowing a high-throughput receiving station to perform a channel estimation on different subcarrier frequencies of the spatial channels. The legacy communication devices may receive and process the training tones and may set their network allocation vector to refrain from communicating during a subsequent interval.
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