为了多用户MIMO(MU-MIMO),一定要避免各个用户相互的干扰,也就是让虚线的这些信号尽量小,这是通过Tx Beamforming(波束成形)来做的。单用户MIMO下,不需要Tx Beamforming来区分,但是可以用它增强信号。 物理层的帧结构 802.11 Physical (PHY) layer 被划分成2个 sublayers: PLCP(Physical Layer Convergence Procedure)...
To accommodate the directionality, beamforming techniques may be utilized to radiate energy in a certain direction with certain beamwidth to communicate between two devices. The directed propagation concentrates transmitted energy toward a target device in order to compensate for significant energy loss in...
(such as a precoding or beamforming, as described in the present disclosure) on the Ndndownlink data symbol streams, and provides Naptransmit symbol streams for the Napantennas. Each transmitter unit222receives and processes a respective transmit symbol stream to generate a downlink signal. Nap...
(such as a precoding or beamforming, as described in the present disclosure) on the Ndndownlink data symbol streams, and provides Naptransmit symbol streams for the Napantennas. Each transmitter unit222receives and processes a respective transmit symbol stream to generate a downlink signal. Nap...