空间调制(SM)算法在接收端常用最大释然(ML)信号检测获得发送天线编号以及调制符号,恢复发射信息比特,但是ML算法复杂度随着天线数和调制阶数的增加呈指数增长,不具有实用性.针对该难题,提出一种新的低复杂度次最优检测算法.通过设置合理的判决门限将信号矢量检测(SVD)和硬限最大似然(HL-ML)算法进行联合.蒙特卡洛仿真结果表明,该算法的误比特率检测性能比SVD算法更接近ML算法,且复杂度与ML算法相比降低了85％.%At receiver,Space Modulation (SM) algorithm always uses Maximum Likelihood (ML) signal detection to obtain the transmission antenna number and the modulation signal and restore the transmitted information bit.However,the complexity of ML algorithm increases exponentially with the increase of the number of antennas and the number of modulation orders,which is not practical.To solve this problem,this paper proposes a new low complexity sub-optimal detection algorithm by setting up a reasonable decision threshold combining Signal Vector Detection (SVD) and Hard Limited-Maximum Likelihood(HL-ML) algorithm.Monte Carlo simulation results show that the detection performance of Bit Error Rate(BER) of the proposed algorithm is more close to the ML algorithm than the SVD algorithm,and the complexity of the algorithm is reduced by 85％ compared with the ML algorithm.
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