Patent ID: 8275076
Filing Date: 2012-09-25
Classification: H04B,H04L

Abstract:
1. A receiver for detecting configured to detect a signal in a multiple antenna system, the receiver comprising: a filter coefficient calculator configured to calculate a Minimum Mean Squared Error (MMSE) filter coefficient using Matrix Inversion Lemma such that an inverse matrix of a first signal portion has a constant value regardless of a repetition signal detection process considering a second signal portion; and a signal detector configured to detect a relevant transmission signal from an interference-removed reception signal using the MMSE filter coefficient, wherein the filter coefficient calculator comprises: wherein the MMSE filter coefficient is configured to be calculated using the following Equations: where σ x 2 is power of a transmission signal, σ 2 is power of a white noise, H is a channel matrix having a size of M×N, I N is an N×N-unit matrix, (•)H is a conjugate transpose matrix, M is the number of transmission antennas, N is the number of reception antennas, h m is an m-th column of H, (j=1, 2, . . . , m−1, m+1, . . . , M) is an interference signal generated by a signal x j transmitted from an antenna j when a transmission signal x m is detected, T=σ x 2 HH H +σ 2 I N , u m (i) =T −1 v j (i) , β (i) =1−(v j (i) ) H T −1 v j (i) , and when the number of the transmission antennas is at least three, a signal v j (j) having a greatest interference is selected.