Space-time coding scheme for the paired weak user in MIMO-NOMA systems

Mingyan GONG; Zhen YANG

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

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Space-time coding scheme for the paired weak user in MIMO-NOMA systems

Correspondences | 更新时间：2024-06-05

- Space-time coding scheme for the paired weak user in MIMO-NOMA systems
- Journal on Communications Vol. 39, Issue 6, Pages: 181-189(2018)
- 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：
- 基金信息：
  
  The National Natural Science Foundation of China(61671252)
- DOI：10.11959/j.issn.1000-436x.2018109
  CLC： TN929.5
- Online First：2018-06，
  
  Published：25 June 2018
- 稿件说明：
移动端阅览
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：

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.

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references

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