空间调制系统中优化的SD检测算法  

Optimized SD detection algorithm for spatial modulation systems

作　　者：赵冠男[1] 范兆毅 杨晓晖 杨若琳 ZHAO Guannan;FAN Zhaoyi;YANG Xiaohui;YANG Ruolin(School of Plysics and Electronic Technology,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2023年第3期326-330,共5页Journal of Liaoning Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(62076114)。

摘　　要：空间调制系统(Spatial Modulation,SM)中的球形译码(Sphere Decoding,SD)检测算法不同于最大似然(Maximum Likelihood,ML)检测算法的搜索方式,SD算法采用深度搜索方式,在降低计算复杂度的同时使检测性能尽可能的接近ML算法.通过分析SD检测算法可知,信道增益矩阵直接影响接收信号及信号检测过程.利用这一特点,本文提出了hrSD算法.该算法根据信道增益矩阵来改变传统SD算法的搜索结构,进而可以更快速的找到完整的搜索路径;此外,为了降低算法的计算复杂度,给出了简化的hrSD(s)算法.通过仿真结果与分析可知,在计算复杂度相同的情况下,hrSD(s)算法的检测性能更优.The sphere decoding(Sphere Decoding,SD)detection algorithm for the spatial modulation(spatial modulation,SM)system is different from the search method of the maximum likelihood(Maximum Likelihood,ML)one.SD algorithm utilizes the deep search method to reduce the calculation complexity and make the detection performance as close as possible to ML.By analyzing the SD detection algorithm,the channel gain matrix directly affects the received signal and the signal detection process.Consequently,this paper proposes a hrSD algorithm which changes the search structure of the traditional SD one according to the channel gain matrix so as to find the complete search path more quickly.Moreover,a simplified hrSD(s)algorithm is proposed to reduce the calculation complexity.The simulation results show that hrSD(s)algorithm has better detection performance with the same computational complexity.

关 键 词：无线通信 空间调制 信号检测 球形译码 

分 类 号：TN911.23[电子电信—通信与信息系统]