| NOMA中基于非规则码片映射的稀疏多用户检测算法 |
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| 引用本文： | 詹德满,李燕龙,王俊义. NOMA中基于非规则码片映射的稀疏多用户检测算法[J]. 计算机应用研究, 2019, 36(7) |
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| 作者姓名： | 詹德满 李燕龙 王俊义 |
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| 作者单位： | 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;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;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 |
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| 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(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) |
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| 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（Chip Mapping-CDMA，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。
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| 关 键 词： | 非正交多址 非规则映射矩阵 压缩感知 多用户检测 |
| 收稿时间： | 2018-02-02 |
| 修稿时间： | 2019-05-23 |
Sparse multiuser detection algorithm based on irregular chip mapping in non-orthogonal multiple access |
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| zhandeman,liyanlong and wangjunyi. Sparse multiuser detection algorithm based on irregular chip mapping in non-orthogonal multiple access[J]. Application Research of Computers, 2019, 36(7) |
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| Authors: | zhandeman liyanlong wangjunyi |
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| Abstract: | 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 can 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. |
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| Keywords: | Non-orthogonal multiple access irregular mapping matrix compressive sensing multi-user detection |
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