Patent ID: 8160183
Filing Date: 2012-04-17
Classification: H04B,H04L

Abstract:
1. A computer-program storage apparatus for performing spatial processing at a receiver in a wireless multiple-input multiple-output (MIMO) communication system comprising a memory unit having one or more software modules stored thereon, the one or more software modules being executable by one or more processors and the one or more software modules comprising: code for obtaining a plurality of received symbol streams for a plurality of data symbol streams sent via a plurality of spatial channels of a MIMO channel in the wireless MIMO communication system, wherein spatial processing is performed at a transmitter with steering vectors, which are estimates of transmitter steering vectors required to orthogonalize the plurality of spatial channels; code for receiving orthogonal pilot transmissions from a plurality of antennas at the transmitter; code for obtaining an estimate of a channel response matrix for the MIMO channel, wherein the estimated channel response matrix is obtained based on the received orthogonal pilot transmissions; and code for performing spatial processing on the plurality of received symbol streams with a spatial filter to obtain a plurality of filtered symbol streams, which are estimates of the plurality of data symbol streams, wherein the spatial filter has a response derived based on a minimum mean square error (MMSE) criterion that minimizes mean square error between the plurality of filtered symbol streams and the plurality of data symbol streams, wherein the spatial filter response is derived in accordance with the following formula: where