基于正交索引调制多址接入的检测和性能分析  

Detection and Performance Analysis Based on Quadrature Index Modulation Multiple Access

作　　者：金小萍[1] 吴青 金宁[1] 陈东晓[1] 王嘉天 JIN Xiao-ping;WU Qing;JIN Ning;CHEN Dong-xiao;WANG Jia-tian(Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province,China Jiliang University,Hangzhou 310018,China;College of Information Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学浙江省电磁波信息技术与计量检测实验室,杭州310018 [2]中国计量大学信息工程学院,杭州310018

出　　处：《北京邮电大学学报》2020年第4期120-126,共7页Journal of Beijing University of Posts and Telecommunications

基　　金：浙江省自然科学基金项目(LY17F010012);浙江省教育厅科研资助项目(Y201840047);国家级大学生创新创业训练计划项目(201810356030);浙江省电磁波信息技术与计量检测重点实验室开放式项目(2019KF0004)。

摘　　要：为了降低正交索引调制多址接入技术(QIMMA)检测算法的复杂度,提出基于接收端球形译码和基于排序的接收端球形译码2种低复杂度检测方案.通过对时隙组合进行加权排序,以增强检测准确性,并且减少搜索次数,达到降低复杂度的效果.与最大似然检测器相比,新方案可以在无性能损失的情况下使检测复杂度降低三分之一以上.此外,根据QIMMA系统特性,推导出了平均误码率的理论值.仿真结果表明,理论结果在中高信噪比范围内与数值仿真结果近乎一致.To reduce the computation complexity of quadrature index modulation multiple access(QIMMA)detection,two low-complexity detection schemes based on receiver sphere decoding and sortingbased sphere decoding are presented.By weighting the combination of time slots,the detection accuracy is enhanced,the number of searches is reduced,and the effect of reducing complexity is achieved.Compared with the maximum likelihood detector,the new scheme can reduce the detection complexity by more than one-third without any performance loss.In addition,analysis of the average bit error rate is derived according to the characteristics of QIMMA system.It id\s shown that it coincides very well with their theoretical counterparts in the range of middle and high signal-to-noise ratio.

关 键 词：索引调制 上行链路传输 多址系统 低复杂度检测算法 

分 类 号：TN929.5[电子电信—通信与信息系统]