Low‐complexity detection method for spatial modulation based on M ‐algorithm

A novel M ‐algorithm‐based detection method called M ‐algorithm to maximum likelihood (M–ML) is proposed for spatial modulation. The proposed algorithm has fixed complexity and reduces complexity by using a parallel structure to limit the search space of an optimum decoder. The simulation results show that by carefully choosing proper values of M , the new algorithm can reduce the computational complexity significantly while maintaining a near‐optimum bit error rate performance.