针对MIMO-NOMA系统中配对弱用户的空时编码方案

龚明言; 杨震

doi:10.11959/j.issn.1000-436x.2018109

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针对MIMO-NOMA系统中配对弱用户的空时编码方案

学术通信 | 更新时间：2024-06-05

- 针对MIMO-NOMA系统中配对弱用户的空时编码方案
- Space-time coding scheme for the paired weak user in MIMO-NOMA systems
- 通信学报 2018年39卷第6期页码：181-189
- 作者机构：
  
  1. 南京邮电大学通信与信息工程学院，江苏南京 210003
  2. 南京邮电大学宽带无线通信和传感网技术教育部重点实验室，江苏南京210003
- 作者简介：
  
  [ "龚明言（1992-），男，江苏淮安人，南京邮电大学硕士生，主要研究方向为非正交多址、天线分集。" ]
  [ "杨震（1961-），男，江苏苏州人，南京邮电大学教授、博士生导师，主要研究方向为无线通信中的通信与信号处理技术、新的压缩感知和非线性自适应语音信号处理理论。" ]
- 基金信息：
  
  国家自然科学基金资助项目(61671252)
- DOI：10.11959/j.issn.1000-436x.2018109
  中图分类号： TN929.5
- 网络出版日期：2018-06，
  
  纸质出版日期：2018-06-25
- 稿件说明：
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龚明言, 杨震. 针对MIMO-NOMA系统中配对弱用户的空时编码方案[J]. 通信学报, 2018,39(6):181-189.

Mingyan GONG, Zhen YANG. Space-time coding scheme for the paired weak user in MIMO-NOMA systems[J]. Journal on communications, 2018, 39(6): 181-189.
龚明言, 杨震. 针对MIMO-NOMA系统中配对弱用户的空时编码方案[J]. 通信学报, 2018,39(6):181-189. DOI： 10.11959/j.issn.1000-436x.2018109.

Mingyan GONG, Zhen YANG. Space-time coding scheme for the paired weak user in MIMO-NOMA systems[J]. Journal on communications, 2018, 39(6): 181-189. DOI： 10.11959/j.issn.1000-436x.2018109.

摘要

鉴于多天线—非正交多址（MIMO-NOMA）系统中配对弱用户较差的中断性能，采用 Alamouti 码为弱用户编码，利用其分集作用来改善弱用户的中断性能，并推导出所提模型中强用户各态历经容量的闭合表达式以及弱用户各态历经容量、中断概率的边界表达式。另外，提出了一种优化系统吞吐量的功率分配算法。最后，数值结果验证了所推表达式的准确性和所提算法的有效性，也证实了所提编码方案中弱用户的中断性能要远优于目前只采用垂直分层空时码（V-BLAST）编码方案中弱用户的中断性能。

Abstract

In view of the paired weak user’s poor outage performance in multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) systems

Alamouti code was adopted to encode for the weak user in order to improve its outage performance by means of diversity

and the closed-form expression of the strong user’s ergodic capacity as well as the boundary-form expressions of the weak user’s ergodic capacity and outage probability was derived in the proposed model.Moreover

a power allocation algorithm for optimizing the system’s throughput was proposed.Finally

the numerical results show the accuracy of the derived expressions

the efficacy of the proposed algorithm

and that the weak user’s outage performance in the proposed coding scheme is far superior to that in the current coding scheme only adopting vertical Bell lab layered space-time (V-BLAST) code.

关键词

Keywords

references

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