Novel approaches for performance enhancement of high rate-spatial modulation system

This paper proposes an enhanced sub-optimal detector for the High Rate-Spatial Modulation (HR- SM) systems presented in [1] by incorporating the ISQRD detector previously proposed in [2] with a new search space. The proposed decoder, called Enhanced ISQRD, achieves not only significant improvement in the bit error rate (BER) performance but also complexity reduction as compared to the ISQRD detector. In addition, we propose a new bit mapping approach that allows the HR-SM system to improve its BER performance. Simulation results and complexity analysis are presented to verify the effectiveness of the proposed approaches in terms of performance improvement and detection complexity reduction when they are applied to the HR-SM systems. © 2016 IEEE.