北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (4): 117-121.doi: 10.13190/jbupt.200804.117.lül

• 研究报告 • 上一篇    下一篇

适用于无线双向中继信道的机会协作网络编码

吕 凌, 于宏毅   

  1. 解放军信息工程大学 信息工程学院,郑州 450002
  • 收稿日期:2008-01-20 修回日期:1900-01-01 出版日期:2008-08-30 发布日期:2008-08-30
  • 通讯作者: 吕 凌

Opportunistic Cooperative Network-Coding for Wireless Two-Way Relay Channel

LÜ Ling, YU Hong-yi   

  1. Institute of Information Engineering, People’s Liberation Army Information Engineering University, Zhengzhou 450002, China)
  • Received:2008-01-20 Revised:1900-01-01 Online:2008-08-30 Published:2008-08-30

摘要:

提出了一种机会协作网络编码(OCNC),该技术将协作分集技术和网络编码技术有机结合,能克服无线信道衰落、提高系统资源利用率和网络吞吐。针对无线双向中继信道中端到端信息交换的情形,分别分析了3步、2步OCNC的误比特率(BER)性能和获取的网络编码增益,结果表明,相对于传统的数据交换方案,3步、2步机会协作网络编码在获得全分集(获得的分集阶数为参与协作的节点数)的同时,也分别获得了4/3倍和2倍的渐近网络编码增益,由于多个协作节点的机会中继,OCNC的网络编码增益在中间SNR区域更为突出。

关键词: 协作分集, 网络编码, 误比特率, 网络编码增益

Abstract:

An opportunistic cooperative network-coding scheme based on space-time coding (OCNC) is proposed for combining channel fading and improving resource efficiency and network throughput. Focusing on the bi-directional traffic flows in wireless cooperative relaying network, the OCNC schemes, termed as 3-step and 2-step schemes respectively is grouped, and their bit error probabilities and the network-coding gain is developed and analyzed. The numerical results show that, in contrast to traditional scheme, a full diversity (i.e. K-order diversity in case of K relay nodes) is achieved by both OCNC schemes and asymptotical 4/3 and 2 times of network-coding gain are obtained by 3-step and 2-step OCNC schemes respectively. In addition, because of opportunistic relaying of multiple nodes, the network-coding gain of OCNC is more considerable in the medium signal-to-noise ratio (SNR) range.

Key words: cooperative diversity, network coding, bit error probability, gain of network coding

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