Patent ID: 7649861

Claim:
A method comprising: generating an initial channel transfer function estimate of a orthogonal frequency division multiplexed (OFDM) communication channel for each of a plurality of channel paths between a multi-antenna mobile station and a multi-antenna base station using a frequency domain representation of received signals; estimating a sampled channel impulse response by performing an inverse Fourier transformation on the initial channel transfer function estimate; representing the estimate of the sampled channel impulse response by a plurality of rays for each of the channel paths; generating a quantized time-domain representation of the initial channel transfer function estimate for each of the channel paths from at least some of the rays; and sending the quantized time-domain representation of the initial channel transfer function estimate to the base station for use in generating beamforming coefficients for use in subsequent transmissions to the mobile station, wherein each ray is associated with a different delay of the estimated sampled channel impulse response for an associated channel path.