In V-BLAST systems, when channel estimation errors exist, the performance of conventional successive interference cancellation (SIC) detector based on minimum mean square error (MMSE) degrades obviously, meanwhile, computational complexity of these algorithms is still high. In order to overcome these problem, a novel adaptive hybrid SIC detector and the correspondingly optimal detection order were proposed based on the subspace tracking algorithm and Hermitian matrix perturbation theorem. The simulation results showed that the proposed algorithm is effective and has perfect immunity to the accuracy of channel estimation errors.
