《计算机应用研究》|Application Research of Computers

NOMA中基于非规则码片映射的稀疏多用户检测算法

Sparse multiuser detection algorithm based on irregular chip mapping in non-orthogonal multiple access

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作者 詹德满,李燕龙,王俊义
机构 1.桂林电子科技大学 认知无线电与信息处理教育部重点实验室,广西 桂林 541004;2.中国电子科技集团公司第54研究所 通信网信息传输与分发技术重点实验室,石家庄 050081
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文章编号 1001-3695(2019)07-044-2120-04
DOI 10.19734/j.issn.1001-3695.2018.02.0049
摘要 针对非正交多址接入系统灵活性不高的问题,基于码片映射码分多址(CM-CDMA)系统,设计了一种非规则结构的码片映射矩阵。根据不同场景需求,该映射矩阵可为各用户分配不同数量的传输码片,提高了系统灵活性。同时分析了非规则映射矩阵的引入满足压缩感知RIP条件,并对该系统模型进行了验证。仿真结果表明,该系统能够利用压缩感知理论可靠地检测出活跃用户和数据,过载率可达300%,有效提升了频谱利用率。
关键词 非正交多址; 非规则映射矩阵; 压缩感知; 多用户检测
基金项目 国家自然科学基金资助项目(61761014)
认知无线电与信息处理教育部重点实验室主任基金资助项目(CRKL170106)
广西研究生教育创新计划资助项目(YCBZ2017050)
广西无线宽带通信与信号处理重点实验室基金资助项目(GXKL061501)
本文URL http://www.arocmag.com/article/01-2019-07-044.html
英文标题 Sparse multiuser detection algorithm based on irregular chip mapping in non-orthogonal multiple access
作者英文名 Zhan Deman, Li Yanlong, Wang Junyi
机构英文名 1.Key Laboratory of Cognitive Radio & Information Processing for Ministry of Education,Guilin University of Electronic Technology,Guilin Guangxi 541004,China;2.Science & Technology on Information Transmission & Dissemination in Communication Networks Laboratory,The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China
英文摘要 In view of the low flexibility of non-orthogonal multiple access system, this paper designed an irregular chip mapping matrix based on chip mapping-CDMA(CM-CDMA) system. This irregular chip mapping matrix could allocate different quantity of transmission chips for each user according to different scene requirements, which improves the flexibility of system. At the same time, it analyzed the condition which satisfied compressed sensing RIP after the irregular mapping matrices was introduced. It also validated the system model. The simulation results show that the system can detect active users and data reliably by using the compressed sensing theory. The overload rate can reach 300%, which improves the spectrum utilization.
英文关键词 non-orthogonal multiple access; irregular mapping matrix; compressive sensing; multi-user detection
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收稿日期 2018/2/2
修回日期 2018/3/16
页码 2120-2123
中图分类号 TN929;TP301.6
文献标志码 A