High efficiency long training field symbol transmission for multiple transmission streams
摘要
說(shuō)明書
In some implementations, the advanced P-matrix design is combined with the tone multiplexing for spatial streams at the access point for benefits seen in downlink multi-user (DL-MU) scenarios with regards to minimizing power fluctuation. For example, an access point performing DL-MU to 4 users having 4 spatial streams per user multiplexes HE-LTF symbols generated based on the advanced P-matrix design across a subset of tones (i.e., frequencies) available for transmission. For example, all 16 HE-LTF symbols are used such that both channel property calculations can be done prior to receiving all 16 HE-LTF symbols and streams for the four users can be multiplexed onto a subset of tones such that the average power for all streams multiplexed into each HE-LTF symbol does not vary substantially from the power determined from the high efficiency short training field (HE-STF) used for the automatic gain control (AGC) setting at the receiver. This combination is described further in the description of
