Patent ID: 7277685

Claim:
A method for automatic gain control (AGC) in a receiver of a multiple-antenna system comprising a plurality of modules having a plurality of receiver antennas for substantially simultaneously receiving a plurality of signals via a single frequency band, the method comprising: amplifying the plurality of received signals with at least an amplifier; generating a plurality of time domain samples of the amplified signals with at least an analog-to-digital converter (ADC) connected to the amplifier; determining at least a candidate power according to root-mean-square (RMS) powers of a group of symbols received at the receiver antennas with a processor connected to the ADC; and setting the gain of the amplifier according to a selected candidate power with the processor; wherein the received RMS power for one antenna is determined as the square root of the averaged product of each received symbol and its complex conjugate for all symbols of the group.