高速移动环境下OTSM迭代检测算法研究李国军①②龙锟①③叶昌荣*①②④梁佳文①②①(重庆邮电大学超视距可信信息传输研究所重庆400065)②(重庆邮电大学光电工程学院重庆400065)③(重庆邮电大学通信与信息工程学院重庆400065)④(重庆邮电大学光电信息感测与传输技术重庆市重点实验室博士后科研工作站重庆400065)摘要：正交时序复用(OrthogonalTimeSequencyMultiplexing,OTSM)通过级联时分和沃尔什-哈达玛(WHT)复用将信息符号在时延和序列域进行复用。由于WHT在调制解调过程不需要进行复杂的乘法运算，相比于正交时频空(OTFS)调制有更低的调制复杂度。该文针对高速移动环境下的OTSM系统提出了一种二级均衡器：首先利用信道矩阵的稀疏性和带状结构在时域逐块进行低复杂度MMSE检测；随后采用高斯-赛德尔(GS)迭代检测进一步消除残余符号干扰。仿真结果表明，所提算法与基于单抽头频域均衡的GS迭代检测算法相比，采用16QAM调制且误码率为10–4时有1.8dB性能增益。关键词：正交时序复用；时延-序列域；沃尔什-哈达玛变换；高斯-赛德尔迭代检测中图分类号：TN926文献标识码：A文章编号：1009-5896(2023)06-2098-07DOI:10.11999/JEIT220541ResearchonOTSMIterativeDetectionAlgorithminHigh-speedMobileEnvironmentLIGuojun①②LONGKun①③YEChangrong①②④LIANGJiawen①②①(LabofBeyondLOSReliableInformationTransmission,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China)②(SchoolofOptoelectronicEngineering,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China)③(SchoolofCommunicationandInformationEngineering,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China)④(PostdoctoralResearchWorkstationofChongqingKeyLaboratoryofOptoelectronicInformationSensingandTransmissionTechnology,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China)Abstract:OrthogonalTimeSequencyMultiplexing(OTSM)multiplexesinformationsymbolsinthedelay-sequencedomainthroughconcatenatedtimedivisionandWalsh-Hadamardmultiplexing.DuetotheWalsh-HadamardTransform(WHT)doesnotrequirecomplexmultiplicationoperationsinthemodulationanddemodulationprocess,ithaslowermodulationcomplexitythanOrthogonalTime-FrequencySpace(OTFS).Inthispaper,atwo-stageequaliz...
