From the course: Wireless Networking Essential Training

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Beamforming

Beamforming

From the course: Wireless Networking Essential Training

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Beamforming

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- [Instructor] Another WiFi enhancement is beamforming. With beamforming, instead of just radiating out a wireless signal in all directions, we can actually focus the access point's transmissions towards specific wireless clients. And the way that's possible is the access points can use multiple waveforms. For example, if you have two identical overlapping waveforms, the high points of those waveforms get added together and the resulting waveform is twice as high. That's something called constructive interference. Conversely, if you take a waveform and make a copy of it, and you flip it upside down on top of the original waveform and you add those together, they add up to zero. That's the way that noise cancellation headsets work. They listen to the background noise in your environment and they play that noise back, except the waveform is inverted. That causes those waveforms to be 180 degrees out of phase. And the result is…

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