Patent ID: 8121210

Claim:
A receiving end apparatus in a Multiple Input Multiple Output (MIMO) wireless communication system, the apparatus comprising: an estimator for estimating a channel matrix between a plurality of Transmit (Tx) antennas of a transmitting end and a plurality of Receive (Rx) antennas of a receiving end; a filter for extracting a sum between interference and noise included in an Rx signal vector by using the estimated channel matrix and for computing a covariance matrix for the sum between the interference and the noise, and for computing a pre-whitening matrix by using the covariance matrix and; and a detector for detecting a Tx signal vector by using the pre-whitening matrix, wherein the estimator cancels an influence of an interference signal in the channel matrix by averaging consecutive channel values in one of a frequency axis and a time axis, and wherein the detector multiplies the pre-whitening matrix by the Rx signal vector and the channel matrix, and detects the Tx signal vector by using the Rx signal vector and the channel matrix to each of which the pre-whitening matrix is multiplied.