Patent ID: 8543070

Claim:
An apparatus comprising: at least one processor configured to receive channel information for at least one subcarrier that is a subset of multiple subcarriers used for data transmission, to obtain transmit steering matrices for the multiple subcarriers based on the channel information for the at least one subcarrier by obtaining at least one transmit steering matrix for the at least one subcarrier based on the channel information and determining a transmit steering matrix for each of the other multiple subcarriers based on the at least one transmit steering matrix by setting the transmit steering matrix for each of the other multiple subcarriers equal to a transmit steering matrix obtained for a closest one of the at least one subcarrier, and to process data for the multiple subcarriers with the transmit steering matrices to send the data from multiple transmit antennas to multiple receive antennas; and a memory coupled to the at least one processor.