Patent ID: 8036601

Claim:
A method for receiving data using a receiver equipped with multiple receive antennas in a wireless channel, on which all dominant transmitting sources transmit use inner codes of rate one symbol per channel use, comprising steps of: estimating a channel matrix seen from a desired transmitter source among the dominant transmitting sources in response to a pilot or preamble signal; converting the estimated channel matrix into an effective channel matrix responsive to the inner code used by the desired transmitting source; collecting the signals received by the multiple receive antennas over four consecutive intervals; separating the real and imaginary parts of the collected received signals and arranging them into a vector of real valued elements; estimating a covariance matrix of the noise plus interference in a linear model whose output is an equivalent of the received observations and in which the effective channel matrix corresponding to each dominant transmitting source inherits the structure of its inner code; computing and feeding back a signal-to-noise-plus-interference-ratio SINR responsive to the covariance matrix and the effective channel matrix corresponding to the desired source and a decoupling property comprising the relationship {tilde over (H)} 1 T {tilde over (R)} 1 −1 {tilde over (H)} 1 =α 1 C 1 +β 1 C 3 , where {tilde over (H)} 1 is the effective channel matrix corresponding to the desired source (with index 1); {tilde over (R)} 1 is an estimate of said covariance matrix and {tilde over (R)} 1 −1 is its inverse; {tilde over (H)} 1 T is the matrix transpose of {tilde over (H)} 1 ; α 1 , β 1 are scalars that depend on {tilde over (H)} 1 and {tilde over (R)} 1 , C 1 is the 8 times 8 identity matrix and C 3 is a particular fixed matrix equal to I 2 ⊕ [ 0 0 1 0 0 0 0 1 1 0 0 0 0 1 0 0 ] where I 2 is the 2 times 2 identity matrix and {circle around (×)} denotes the kronecker product.