Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (1): 31-37.doi: 10.3969/j.issn.1000-565X.2010.01.007

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

A Novel Cooperative Scheme for Multiple-Access Relay Channel

Han Chun-lei  Ge Jian-hua  Wang Yong  Gao Ming   

  1. State Key Laboratory of Integrated Service Networks, Xidian University, Xi＇an 710071, Shaanxi, China
  • Received:2009-06-11 Revised:2009-08-07 Online:2010-01-25 Published:2010-01-25
  • Contact: 韩春雷（1982-），男，博士生，主要从事数字通信无线传输技术和协作通信技术研究． E-mail:clhan@mail．xidian．edu．cn
  • About author:韩春雷（1982-），男，博士生，主要从事数字通信无线传输技术和协作通信技术研究．
  • Supported by:

    广东省-国家自然基金委联合基金资助项目（U0635003）;陕西省自然科学基金资助项目（2007F07）;国家科技重大专项（2009ZX3003-003,2009ZX3003-004）

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Abstract:

As for the conventional multiple-access relay cooperation scheme, the coding gain is limited and users cannot assist each other. In order to solve these problems, a novel cooperative scheme based on network and channel coding is proposed. In this scheme, the coding redundancy of different users is simultaneously forwarded through network coding at the relay node, and, once the codes of one user are correctly decoded at the destination, the coding redundancy of other users can be retrieved. The approximations of outage probability and bit error rate of the proposed scheme are then deduced by analyzing the error event probability. Simulation results show that the proposed scheme is of better performance than the coded cooperation scheme in terms of outage probability and bit error rate when the signal to noise ratio （SNR） is getting higher, and that the performance of the user with low SNR can be improved with the help of the user with high SNR.

Key words: cooperative diversity, channel coding, network coding, outage probability, bit error rate, signal to noise ratio