Patent ID: 7978781

Claim:
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 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 channel, wherein the reverse channel corresponds to a signal direction from the second transceiver device to the first transceiver device; determining a partial dimensional description of the reverse channel based on the reception of the second packet; developing a correction matrix from the partial dimensional description of the reverse channel and a description of the forward channel; using the correction matrix to process signals to be transmitted via the forward channel; and using a steering matrix to perform beamforming in the forward channel.