Patent ID: 8391397
Filing Date: 2013-03-05
Classification: H04B,H04L

Abstract:
1. A method of beamforming within a communication system having (i) a first transceiver device having a first plurality of antennas and (ii) a second transceiver device having a second plurality of antennas, the method comprising: transmitting a first packet via a forward multiple input, multiple output (MIMO) channel corresponding to a signal direction from the first transceiver device to the second transceiver device, wherein the first packet includes a request to initiate calibration; receiving, from the second transceiver device, a second packet that includes training information of spatial dimensions used for the transmission of the second packet but does not include training information for all available spatial dimensions of a reverse MIMO channel, wherein the reverse MIMO channel corresponds to a signal direction from the second transceiver device to the first transceiver device; determining a partial dimensional description of the reverse MIMO channel based on the reception of the second packet; developing a correction matrix from the partial dimensional description of the reverse MIMO channel and a description of the forward MIMO channel; and using the correction matrix to process signals to be transmitted via the forward MIMO channel.