功率分配一直是无线通信系统中的一项最主要的关键技术，研究如何提高能量利用率对无线通信系统有重大意义.针对多中继放大转发协同通信系统，提出一种新型的功率分配方法，以最小化发送功率为目标，将模拟退火(simulated annealing,SA)算法应用于求功率分配因子.仿真结果表明，该方法在误码率性能和系统容量方面都明显优于等功率分配方法.在给定误码率情况下，该方法能够节省发送功率.

Power allocation has long been one of the most crucial technologies in wireless communications. Research on effective utilization of power has great significance for wireless systems. This paper proposes a novel power allocation scheme for the amplify-and-forward (AF) cooperative communication systems to minimize the total transmit power. The simulated annealing (SA) algorithm is introduced here to solve the optimization problem. Simulation results indicate that the proposed scheme outperforms that of equal power allocation scheme in terms of bit error rate and system capacity. 