Suboptimal and Optimal MIMO-OFDM Iterative Detection Schemes

A novel iterative detection scheme for MIMOOFDM systems is proposed in this paper. The authors show that the existing detection schemes are sub-optimum and the iterative process can be optimized by utilizing the non-circular property of the residual interference after interference cancellation. Results show that the proposed iterative scheme outperforms the conventional Iterative Soft Interference Cancellation (ISIC) and V-BLAST schemes by about 1.7 and 4.0 dB, respectively, in a 4×4 antennas system over exponentially distributed eleven path channels.