Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (9): 87-93.doi: 10.3969/j.issn.1000-565X.2016.09.013

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

Cooperative Communication System with Directive Antennas and Optimal Relay Selection AF Strategy

WANG Ming-wei1,2 LI Li-xin1 ZHANG Hui-sheng1 XIE Wen-jiao1   

  1. 1.School of Electronics and Information,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China; 2.College of Electrical and Information Engineering,Shaanxi University of Science and Technology,Xi'an 710021,Shaanxi,China
  • Received:2015-06-01 Revised:2016-02-19 Online:2016-09-25 Published:2016-08-21
  • Contact: 王明伟( 1976-) ，男，博士生，主要从事协作通信技术研究． E-mail:sxxywmw@163.com
  • About author:王明伟( 1976-) ，男，博士生，主要从事协作通信技术研究．
  • Supported by:
    Supported by the Post Doctoral Science Foundation of China( 2014M552489)

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Abstract: A multi-relay cooperative communication system adopting directive antennas and optimal relay-selection AF cooperative strategy is proposed,and a corresponding formula of system outage probability is derived theoretically.On the basis of the theoretical analysis result,the relationships between the outage probability and the parameters ( namely,the signal-to-noise ratio,the channel fading coefficient,the antenna power gain,the number of relay nodes and the power allocation coefficient) are analyzed by simulations.The results show that the proposed communication system can meet the requirements of military communication for RF stealth,and under the conditions of low signal-to-noise ratio,deep fading channel and limited relay nodes,it has a smaller outage probability in comparison with the cooperative communication system with omnidirectional antennas and the same strategy,which means that the communication reliability is improved.

Key words: cooperative communication, directive antennas, optimal relay selection, amply and forward, outage probability