一种低复杂度的联合信号检测算法

A low complexity joint signal detection algorithm

空间调制(Spatial Modulation,SM)技术每一时刻只激活一根发送天线用于信息数据的传输,大大改善了传统多输入多输出(Multiple Input Multiple Output,MIMO)系统存在的问题.然而,SM系统的性能好坏多取决于接收端的信号检测算法.因此,为有效提高系统性能,在对现有的SM系统信号检测算法的优缺点进行分析的基础上,提出了一种联合信号检测算法.该算法将归一化最大比合并(Normalized Maximum Ratio Merging,NMRC)算法与拥有硬限判决条件的最大似然(Hard Limiting-Maximum Likelihood,HL-ML)算法相结合,取长补短,以达到既能保证系统最优检测性能又可以减小计算复杂度的目的.仿真结果表明,该联合算法的误比特率检测性能接近于最优检测算法,同时其计算复杂度被大大降低.

Spatial Modulation(SM)technology only activates one sending antenna at a time for information and data transmission,which greatly improves the problems existing in the traditional Multiple Input Multiple Output(MIMO)system.However,the performance of SM system mainly depends on the signal detection algorithm of the receiver.Therefore,in order to effectively improve the system performance,this paper proposes a joint signal detection algorithm based on the analysis of the advantages and disadvantages of the existing SM system signal detection algorithm.The algorithm combines the Normalized Maximum Ratio Combining(NMRC)algorithm and the Hard Limiting-Maximum Likelihood(HL-ML)algorithm to achieve the purpose of ensuring the optimal detection performance of the system and reducing the computational complexity.Simulation results show that the bit-error rate detection performance of the proposed algorithm is close to the optimal detection algorithm,and its computational complexity is greatly reduced.