Improved V-BLAST receiver for uplink CDM-OFDMA

This paper proposes a novel detection algorithm for multiple-input multiple-out (MIMO) code division multiplex-orthogonal frequency division multiplex access (CDM-OFDMA) system in the uplink. Vertical Bell Laboratories Layered Space-Time (V-BLAST) detection is processed only after despreading/combining at the receiver, which not only achieves good frequency diversity gain but also has low implementation complexity. Parallel interference cancellation (PIC) algorithm can also be applied to improve the performance of systems with heavy loads. Computer simulation demonstrates effectiveness of this detector and conclusion is followed.