What is beamforming?

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  • Updated 6 years ago
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Beamforming is the process by which a transmitter determines the best path for the signal and adjusts amplitude and phase characteristics of the signal driving each transmitting element to steer the RF toward the receiver.

Internally, the transmitter codes or assigns weights to signals before transmission to maximize the signal-to-noise ratio at the receiver. The weights depend on the transmitter’s estimate of the channel to the receiver. The information to estimate the channel can be obtained through implicit or explicit feedback. Beamforming allows coherent combining of the multiple, independently fading signal paths at the receiver.

Transmit beamforming is an optional feature in the 802.11n standard.
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Posted 6 years ago

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