Enhanced Zero Forcing Order Successive Interference Cancellation Scheme for MIMO System

초록

Detection for the receivers in Multiple Input Multiple Output (MIMO) system is a challenge. Various detection schemes are considered to improve performance as well as reduce complexity. Maximum Likelihood (ML) is the best among other detection schemes in terms of performance, while facing huge complexity issue. Vertical Bell Lab Space Time (V-BLAST) improves performance with a less complexity compare to ML. In this study we modified Zero Forcing-Ordered Successive Interference Cancellation (ZF-OSIC) scheme to improve its performance. The idea is to assign top layers to ZF-OSIC while last two layers who has lower SNR values to ML for detection. In this way the issue of propagation errors from the previous layers is solved in certain limit. Here we assign small number of layers to ML, which consequently not increases the complexity.