A Low-Complexity Detection Algorithm for Generalized Space Shift Keying Systems

Generalized space shift keying (GSSK) transmits signals through antenna indices, which can overcome the problems of inter-channel interference (ICI), inter-antenna synchronization (IAS) and multiple radio frequency (RF) chains in traditional MIMO technology, and provide a new method for the application of next-generation large-scale MIMO technology. However, maximum likelihood (ML) detection has high complexity, which greatly increases the detection time. A new detection algorithm, termed as PS-ML algorithm, which combines the idea of probability sorting (PS) and ML detection, is proposed in this paper. Simulation results show that the proposed detector makes a good tradeoff between the BER performance and the complexity.