北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2011, Vol. 34 ›› Issue (s1): 59-62.doi: 10.13190/jbupt.2011s1.59.huzw

• 论文 • 上一篇    下一篇

基于GABBA码的分布式空时编码改进方案

胡紫巍,袁超伟,田心记,王秋才   

  1. 北京邮电大学 信息与通信工程学院, 北京 100876
  • 出版日期:2011-10-28 发布日期:2011-10-28
  • 作者简介:胡紫巍(1985-),男,博士生,E-mail:huswim@bupt.edu.cn 袁超伟(1961-),男,教授,博士生导师
  • 基金资助:

    国家自然科学基金项目(60672132, 60872149)

An Improved Scheme of Distributed SpaceTime Coding Based on GABBA Codes

    

  1.  
  • Online:2011-10-28 Published:2011-10-28
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摘要:

放大转发中继网络中,传统的基于广义ABBA(GABBA)码的分布式空时编码方案没有利用传输过程中的信道状态信息(CSI),针对此问题提出了一种基于GABBA码的分布式空时编码改进方案. 在该方案中,接收端由CSI得到本次传输的反馈信息,1个中继节点根据此反馈信息对该支路原发送信号进行预处理,从而减小了信道相关性,提高了系统的可靠性. 理论分析和仿真结果显示,与已有结果相比,所提方案只需要以1个比特的反馈量为代价,就能使系统的误比特率性能获得显著改善.

关键词: 中继网络, 分布式空时编码, 反馈, 广义ABBA码

Abstract:

Aim at the problem that the channel state information (CSI) is not taken full advantage in traditional distributed generalized ABBA (GABBA) spacetime codes in amplifyandforward relay networks, an improved scheme is proposed. In this scheme, the receiver calculates and sends out the current feedback information according to the CSI. After receiving the feedback information at one of the relay nodes, some preprocess is used on the original signal of this branch. The scheme can alleviate the interference brought by channel dependence, and improve reliability of the system. Analysis and simulation result suggest that the proposed scheme can significantly decrease the system bit error rate in contrast with the former scheme at the cost of one bit feedback information.

Key words: relay networks, distributed spacetime codes, feedback, generalized ABBA codes

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