Patent ID: 8223877

Claim:
A method for detecting a receive signal of a receiver in a Multiple-Input Multiple-Output (MIMO) system including a filter, a candidate set acquirer, and a detector, the method comprising: filtering, by the filter, each stream of a received signal; acquiring, by the candidate set acquirer, a new search space by acquiring a set of candidates having reliability greater than a threshold with respect to each filtered stream; and detecting, by the detector, a signal for each stream of the new search space, wherein the filtering is performed using: G = ( H H ⁢ H + σ n 2 σ s 2 ⁢ I ) - 1 ⁢ H H , where H denotes a channel matrix of N r ×N t , ( ) H denotes a Hermitian transpose operation, ( ) −1 denotes an inverse function, and σ s 2 denotes a variance.