Patent ID: 7835260

Claim:
A method for receiving signals in a multi-user system, the method comprising: receiving signals from a first mobile station and a second mobile station using a ‘k’-th radio resource and a ‘k+m’-th radio resource; estimating a channel matrix using the received signals; calculating weight values such that the channel matrix has orthogonality to the signals from each of the first and second mobile stations; transmitting the weight values to each of the first and second mobile stations; and receiving second signals from the first and second mobile stations, in which the weight values are applied by each of the first and second mobile stations, wherein the received second signals r k and r k+m are represented as follows: [ r k r k + m ] = [ w 11 · h 1 , k w 12 · h 2 , k w 21 · h 1 , k + m - w 22 · h 2 , k + m ] ⁡ [ s 1 s 2 ] + [ n k n k + m ] , and wherein s 1 represents a signal of the first mobile station and s 2 represents a signal of the second mobile station, n k and n k+m represent additive white Gaussian noise, and the weight values have the following values: w 11 = w 12 = w 21 = 1 , w 22 = h 1 , k * ⁢ h 2 , k h 1 , k + m * ⁢ h 2 , k + m .