通信学报 ›› 2017, Vol. 38 ›› Issue (5): 11-18.doi: 10.11959/j.issn.1000-436x.2017081

• 学术论文 • 上一篇    下一篇

全双工协作通信系统中分布式Alamouti空时编码的性能分析

冯文江1,刘国岭1,钟昕辉1,姚楚楠1,张博为1,代才莉1,2   

  1. 1 重庆大学通信工程学院,重庆 400044
    2 重庆电子工程职业学院通信工程学院,重庆 401331
  • 修回日期:2017-01-22 出版日期:2017-05-01 发布日期:2017-05-28
  • 作者简介:冯文江(1963-),男,四川西充人,博士,重庆大学教授、博士生导师,主要研究方向为宽带无线接入技术、认知无线电、通信信号处理等。|刘国岭(1989-),男,辽宁北票人,重庆大学博士生,主要研究方向为协作通信、全双工通信等。|钟昕辉(1993-),男,湖北武汉人,重庆大学硕士生,主要研究方向为认知无线电。|姚楚楠(1994-),男,湖南娄底人,重庆大学硕士生,主要研究方向为认知无线电。|张博为(1988-),男,重庆人,重庆大学博士生,主要研究方向为预编码理论、MIMO系统干扰管理等。|代才莉(1982-),女,吉林延边人,重庆大学博士生,重庆电子工程职业学院副教授,主要研究方向为信号与信息处理、5G关键技术等。
  • 基金资助:
    重庆市研究生科研创新基金资助项目(CYB14042);重庆市教委科学技术研究基金资助项目(KJ1602903)

Performance analysis of distributed Alamouti space-time codes in full-duplex cooperative communication system

Wen-jiang FENG1,Guo-ling LIU1,Xin-hui ZHONG1,Chu-nan YAO1,Bo-wei ZHANG1,Cai-li DAI1,2   

  1. 1 College of Communication Engineering,Chongqing University,Chongqing 400044,China
    2 School of Communication Engineering,Chongqing College of Electronic Engineering,Chongqing 401331,China
  • Revised:2017-01-22 Online:2017-05-01 Published:2017-05-28
  • Supported by:
    Chongqing Graduate Student Research Innovation Project(CYB14042)

摘要:

针对存在残留自干扰(RSI)的3节点全双工协作通信系统,研究分布式Alamouti空时码(DASTC)的差错性能。通过分析成对差错概率及其在高发射功率下的渐进表达式,导出了系统的分集增益和编码增益;进一步分析残留自干扰对分布式空时码编码结构的影响,导出了分集增益的可达条件。理论分析和仿真结果表明,在高发射功率和小残留干扰下,DASTC 在全双工协作通信系统中是一种全速率、满分集的空时码,在相同频谱效率下的差错性能优于半双工协作通信系统;充分抑制自干扰能获得更高的分集增益和编码增益,并强化分集增益的可达性,提高系统的频谱效率和能量效率。

关键词: 全双工, 协作通信, 分布式空时码, 成对差错概率

Abstract:

The error performance of distributed Alamouti space-time code (DASTC) was investigated in a 3-node full-duplex (FD) cooperative communication system with the presence of residual self-interference (RSI).Based on the asymptotic expression of the pairwise error probability in the high transmit power region,the diversity and coding gain were derived.The impact of residual self-interference on the construction of space-time code was analyzed and the achievable condition of diversity gain was obtained.Analytical results show that DASTC achieves full rate and full diversity in the FD cooperative communication system with high transmit power and low RSI.The error performance of the FD system is superior to which of the half-duplex system under the same spectral efficiency constraint.The diversity and coding gain can be increased by sufficiently suppressing the self-interference,and the spectral efficiency and power efficiency can be improved as well.

Key words: full-duplex, cooperative communication, distributed space-time coding, pairwise error probability

中图分类号: 

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