Abstract: A novel modulation scheme called joint multi-antenna selection mapping generalized space modulation (JAS-GSM) is proposed to solve the problems of inter-channel interference and high correlation between antennas in Generalized Spatial Modulation (GSM) systems. A low-complexity Transmit Antenna Combination (TAC) optimization algorithm is designed to reduce inter-channel interference and computational complexity based on the maximizing minimum Hamming distance criterion. At the same time, all antenna combinations participate in the joint mapping of the codebook by using the redundant characteristics of the optimized TAC, and an efficient screening algorithm for the joint mapping codebook is designed based on the maximizing minimum Euclidean distance criterion to improve bit error rate performance further. By deriving the theoretical boundary formula of the bit error rate of the JAS-GSM scheme, the correctness of the simulation results is verified, and the joint mapping codebook screening algorithm design is assisted. Simulation results show that the proposed JAS-GSM scheme can achieve better bit error rate (BER) performance than existing antenna selection techniques and GSM variant techniques.

Key words: generalized spatial modulation (GSM), antenna selection, transmit antenna combination (TAC), bit error rate (BER)