Extended Variable Active Antenna Generalized Spatial Modulation

In this letter, a novel scheme which is called extended variable active antenna generalized spatial modulation (EV-GSM) to achieve the transmission of more extra bits of information is proposed. Firstly, the transmission mode of variable active antennas is determined according to the transmitting antenna. Then, to eliminate detection ambiguity at the detector, after selecting a specific transmission scheme, the sum of the number of bits required for the variable active antenna combination and different modulation symbols is a positive integer. In addition, we analyze the theoretical upper bound of the average bit error probability (ABEP) and the computational complexity of the detection side. Finally, Monte Carlo simulation results show that the bit error rate (BER) performance of the EV-GSM scheme using the maximum likelihood (ML) detection algorithm is better than the traditional spatial modulation scheme, and computational complexity can be reduced under the same conditions.