Patent ID: 7860183
Filing Date: 2010-12-28
Classification: H04B,H04L

Abstract:
1. A multicarrier MIMO receiver for receiving through two or more spatially-diverse receive antennas comprising: two or more receive-signal paths to receive MIMO training signals through a MIMO channel; and signal processing circuitry to estimate a MIMO channel transfer function for each of a plurality of subcarriers of the MIMO channel from the received training signals, the signal processing circuitry to further estimate a spatial correlation matrix for the subcarriers from noise and interference signal samples obtained during the reception of the training signals, the signal processing circuitry to further generate beamformer weights for the subcarriers using the channel transfer functions and the spatial correlation matrices, the beamformer weights for use in subsequent communication through the MIMO channel, wherein to generate the spatial correlation matrices, the signal processing circuitry is configured to: multiply the MIMO channel transfer function estimate by known training signals to obtain an estimate of the received training signals, the known training signals transmitted to provide orthogonality between transmissions of different spatially-diverse transmit antennas; sum the MIMO training signals including any noise and interference received through the two or more receive antennas to obtain an overall received signal for each subcarrier; and subtract the estimate of the received training signals from the overall received signal to obtain the noise and interference signal samples for each of the subcarriers for use in generating the spatial correlation matrices.