基于非正交多址接入中继通信系统的功率优化

黄容兰; 刘云; 李啟尚; 唐文

doi:10.11999/JEIT180842

基于非正交多址接入中继通信系统的功率优化

doi: 10.11999/JEIT180842

黄容兰¹,
刘云^2, ,,
李啟尚³,
唐文³

1.
梧州学院广西高校图像处理与智能信息系统重点实验室梧州 543002
2.
仲恺农业工程学院信息科学与技术学院广州 510225
3.
95795部队教研部装备维修教研室桂林 541003

基金项目: 国家自然科学基金(61501531)；梧州学院2012校级科研项目(2012C001)

详细信息

作者简介:
黄容兰：女，1982年生，硕士，讲师，研究方向为物理层技术与多用户检测、无线网络通信资源分配与调度

刘云：男，1980年生，博士，副教授，研究方向为无线通信，水声通信、扩频与码分多址理论

李啟尚：男，1986年生，助教，研究方向为电子技术设计与应用

唐文：女，1984年生，讲师，研究方向为电子技术设计与应用

通讯作者:
刘云　lauwin007@yahoo.com

¹⁾ 在本文中，统计信道信息(S-CSI)是指用信道的统计信息来描述信道特征，比如衰落分布类型、平均信道增益等特征参数；瞬间信道信息(I-CSI)则是指实时反映当前信道状态的参量。
²⁾ 本文研究的是中继工作在半双工模式的情况，同样，所提出的H-PAS功率分配策略也同样适用于当中继工作在全双工(Full-Duplex, FD)模式的场景。
³⁾ 对于功率域的非正交多址接入系统而言，就上行链路来说，一般认为质量好的信道为强信号并且在接收端被先解码；而对于下行链路来说，一般认为质量好的信道为弱信号并且在接收端被后解码。
中图分类号: TN929
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出版历程
- 收稿日期: 2018-08-29
- 修回日期: 2019-01-30
- 网络出版日期: 2019-03-19
- 刊出日期: 2019-08-01

Power Allocation Optimization of Cooperative Relaying Systems Using Non-orthogonal Multiple Access

1.
Guangxi Colleges and Universities Key Laboratory of Image Processing and Intelligent Information System, Wuzhou University, Wuzhou 543002, China
2.
College of Information Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
3.
Department of Equipment Maintenance of 95795 Troop of the PLA, Guilin 541003, China

Funds: The National Natural Science Foundation of China (61501531), The Scientific Research Project of Wuzhou University 2012 (2012C001)

摘要

摘要: 针对基于非正交多址接入(NOMA)技术的中继通信系统，在兼顾系统性能与计算复杂度的基础上，该文提出一种结合统计信道信息(S-CSI)和瞬时信道信息(I-CSI)的混合功率分配策略(H-PAS)来有效实现上述折中。仿真结果表明，NOMA方案在H-PAS策略下，一方面比单纯利用S-CSI时的传统正交多址接入技术具有更高的频谱效率；另一方面在和速率差别不大的情况下，又比单纯利用I-CSI时的NOMA方案具有更低的信令开销和计算复杂度。
- 非正交多址接入 /
- 和速率 /
- 功率分配
Abstract: A novel scheme termed Hybrid Power Allocation Strategy (H-PAS), which is integrated with Statistical Channel State Information (S-CSI) and Instantaneous Channel State Information (I-CSI), is proposed for Non-Orthogonal Multiple Access (NOMA) based on cooperative relaying systems to achieve a better performance-complexity tradeoff. Simulation results demonstrate that, with the proposed H-PAS, on the one hand, NOMA shows distinct advantage on the sum-rate compared with conventional orthogonal multiple access techniques in which only the knowledge of S-CSI is available; On the other hand, NOMA reduces the signaling overhead and computational complexity at the expense of marginal sum rate degradation when compared with the cases in which only the knowledge of I-CSI is available for it.
- Non-Orthogonal Multiple Access (NOMA) /
- Sum-rate /
- Power Allocation (PA)
¹⁾ 在本文中，统计信道信息(S-CSI)是指用信道的统计信息来描述信道特征，比如衰落分布类型、平均信道增益等特征参数；瞬间信道信息(I-CSI)则是指实时反映当前信道状态的参量。

²⁾ 本文研究的是中继工作在半双工模式的情况，同样，所提出的H-PAS功率分配策略也同样适用于当中继工作在全双工(Full-Duplex, FD)模式的场景。

³⁾ 对于功率域的非正交多址接入系统而言，就上行链路来说，一般认为质量好的信道为强信号并且在接收端被先解码；而对于下行链路来说，一般认为质量好的信道为弱信号并且在接收端被后解码。

HTML全文

图 1 系统模型

下载: 全尺寸图片幻灯片

图 2 所提NOMA与OMA在两种不同信道条件下的系统遍历容量对比

下载: 全尺寸图片幻灯片

图 3 性能对比与图2相同但信道条件不同

下载: 全尺寸图片幻灯片

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