基于部分消息更新的多天线与多用户联合检测  

Multi-antenna and multi-user joint detection based on partial message updating

作　　者：蒋芳 江淑萍 杨海蓉 王翊 许耀华 胡艳军[1] JIANG Fang;JIANG Shuping;YANG Hairong;WANG Yi;XU Yaohua;HU Yanjun(Key Laboratory of Intelligent Computing&Signal Processing,Ministry of Education,Anhui University,Hefei 230601,China;Engineering Technology Research Center of Internet of Things Spectrum Sensing and Testing,Anhui Province,Hefei 230601,China;School of Mathematics and Statistics,Hefei Normal University,Hefei 230601,China)

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230601 [2]安徽省物联网频谱感知与测试工程技术研究中心,安徽合肥230601 [3]合肥师范学院数学与统计学院,安徽合肥230601

出　　处：《安徽大学学报（自然科学版）》2023年第2期44-50,共7页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(62071002,62001001)。

摘　　要：多输入多输出稀疏码分多址(multiple-input multiple-output sparse code multiple access,简称MIMOSCMA)系统具有大容量和高频谱效率,能够满足大规模机器通信场景低时延和大连接的需求.针对MIMOSCMA系统检测复杂度高的问题,对基于部分消息更新的多天线与多用户联合检测进行研究,提出软判决联合消息传递算法(soft decision joint message passing algorithm,简称SD-JMPA)和硬判决联合消息传递算法(hard decision joint message passing algorithm,简称HD-JMPA).仿真实验结果表明:SD-JMPA和HDJMPA的误比特率(bit error ratio,简称BER)均与最大似然(maximum likelihood,简称ML)和联合消息传递算法(joint message passing algorithm,简称JMPA)的BER相近;SD-JMPA和HD-JMPA均具有与JMPA大概一致的收敛性;低信噪比场景下,选择使用SD-JMPA;高信噪比场景下,选择使用HD-JMPA.因此,相对于ML和JMPA,SD-JMPA和HD-JMPA均具有更强综合性能.Multiple-input multiple-output sparse code multiple access(MIMO-SCMA)system has large capacity and high spectral efficiency,which can meet the requirements of low latency and large connection in massive machine type communication scenarios.Aiming at the high detection complexity of MIMO-SCMA system,soft decision joint message passing algorithm(SD-JMPA)and hard decision joint message passing algorithm(HD-JMPA)were proposed to study multi-antenna and multi-user joint detection based on partial message updating.According to the simulation results,the bit error ratio(BER)of SD-JMPA and HD-JMPA were similar to that of maximum likelihood(ML)and joint message passing algorithm(JMPA).Both SD-JMPA and HD-JMPA had the same convergence as JMPA.In low SNR scenarios,SD-JMPA was selected.In high SNR scenarios,HD-JMPA was used.Therefore,compared with ML and JMPA,SD-JMPA and HD-JMPA had stronger comprehensive performance.

关 键 词：MIMO-SCMA 码字消息 软判决 比重因子 硬判决 硬性判决参数阈值 

分 类 号：TN914.42[电子电信—通信与信息系统]