| 摘要 |
Beamforming can be simplified by selecting beamforming parameters without relying on channel state information (CSI). More specifically, beamforming parameters may be selected without CSI by applying different beamforming weight vectors to different subcarriers of a reference packet, and thereafter identifying which subcarrier had the highest signal quality upon reception of the reference packet by the user equipment (UE). The reference packet may be any packet, including a beacon packet, a null data packet, and other packets that are communicated periodically by an access point (AP). One or multiple codebooks may be used, and different codewords (or sets of codewords) may be applied in a time division multiplying (TDM) fashion.
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