Patent ID: 8432993

Claim:
An apparatus for estimating a channel response associated with a multiple input/multiple output (MIMO) system, said apparatus comprising: an antenna configured to receive a plurality of pilot symbols, each of the plurality of pilot symbols transmitted from a different one of multiple transmit antennas of a transmitter in the MIMO system; and a channel estimator configured to determine spatial, time and frequency correlations of channels of the MIMO system among the multiple transmit antennas, when estimating a channel response associated with the MIMO system based on multiple ones of the received plurality of pilot symbols by, estimating one of the spatial, time and frequency correlations of the channels of the MIMO system among the multiple transmit antennas; estimating a first channel response based on the estimated one of the spatial, time and frequency correlations; re-estimating the one of the spatial, time and frequency correlations of the channels of the MIMO system based on the first channel response; and re-estimating the first channel response to produce a second channel response.