Patent ID: 8498362
Filing Date: 2013-07-30
Classification: H04B,H04L,H04W

Abstract:
1. A method of antenna selection in a multiple-input-multiple-output (MIMO) system, wherein communication is between a transmitter having a first plurality of radio-frequency (RF) chains coupled to a first plurality of antennas and a receiver having a second plurality of RF chains coupled to a second plurality of antennas, the method comprising: receiving from the transmitter consecutive sounding packets that each have a training symbol and that collectively sound a full-size channel for the MIMO system, where the consecutive sounding packets are produced by applying a power level rule to the first plurality of RF chains at the transmitter; determining a sub-channel estimate for each corresponding consecutive sounding packet based on the power level rule and a gain factor for each of the received consecutive sounding packets; and applying respective scaling factors to each sub-channel estimate to produce scaled sub-channel estimates, wherein the respective scaling factors are dependent upon the power level rule and the respective gain factors.