简介
Beamforming,即波束成形,是一种让信号能量集中在一个方向上的传输技术。
规范
- 802.11n (wifi-4) defined several methods for beamforming,optional;
- 802.11ac (wifi-5) settled on a standard NDP method;
- 802.11ax (wifi-6) will bring uplink MU-MIMO, this doesn’t exist in the first generation chipsets. The schedule for this is unknown at the time of writing. The sounding process has also been optimised to reduce overhead;
作用
它对传统wifi主要有2点提升:
- 天线信号增强,改善传输速度和信号范围。
- 空间上的冲突域隔离,提升网络的整体吞吐量。
一个效果图如下: