Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (9): 1222-1225.DOI: 10.12068/j.issn.1005-3026.2017.09.002

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Research on Relay Power Allocation Algorithm for Cooperative Communication Systems

FAN Li-na1, WANG Jin-kuan2, GAO Jing1, LYU La-mei1   

  1. 1. School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; 2. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2016-05-01 Revised:2016-05-01 Online:2017-09-15 Published:2017-09-08
  • Contact: WANG Jin-kuan
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Abstract: Power allocation of the cooperative communications was investigated, as well as an optimal power allocation of single relay system with amplify-and-forward (AF) protocol. The instantaneous symbol error rate (SER) for the AF relay system was derived first and the objective of optimization by minimizing the system error rate was defined. Secondly, the penalty factor was introduced to transform the constrained minimum bit error rate problem into an unconstrained problem and then a new objective function was established. Finally, a combination of artificial fish swarm and particle swarm optimization algorithm(AFPSO) was proposed to solve the system optimization problem. Simulation result shows that the proposed algorithm can improve the system performance and reduce the computational complexity.

Key words: power allocation, cooperative communications, relay, artificial fish swarm, particle swarm optimization

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