Partial OSIC Detection for V-BLAST Systems

As a promising MIMO spatial multiplexing scheme, Vertical Bell Laboratories Layered Space-Time (V-BLAST) can achieve high channel capacity without any increase in bandwidth and transmission power. In this paper a partial ordered successive interference cancellation detection scheme is proposed to reduce the high computational complexity and large system delay caused by the pseudo inverse of channel matrix and the ordering process in the conventional OSIC algorithm. Some layers are sorted in the descending order and P-layers' OSIC is employed. The received signal after interference cancellation passes through linear equalization or parallel interference cancellation with low complexity. Simulation results for the proposed algorithm with Zero-forcing and MMSE criterion show that the proposed algorithm can decrease the computational complexity without performance loss.