Patent ID: 7676007
Filing Date: 2010-03-09
Classification: H04B,H04L

Abstract:
1. A communication apparatus, comprising: a plurality of antennas; and a transmitter coupled to the antennas and configured to provide to the antennas a plurality of output signals on a plurality of subcarriers for transmission to a receiver of another communication apparatus, wherein: the transmitter is configured to provide the output signals in response to a plurality of input signals and limited feedback information; the transmitter is configured to receive the limited feedback information from the receiver; the limited feedback information includes interpolation information and beamforming vectors for a subset of the subcarrriers; the transmitter is configured to derive beamforming vectors for at least one subcarrier of the plurality of subcarriers not included in the subset based at least on an interpolation of the beamforming vectors for a subset of the subcarriers; the interpolation is based at least in part on the interpolation information; and the interpolation information includes phase values.