前向放大协作中继系统中的优化功率分配

对于无线通信系统中的单天线节点来说,协作中继技术能有效地提高通信性能。研究了瑞利衰落信道下两跳放大前传协作中继系统的最优化功率分配问题。推导了高信噪比条件下的协作中继系统的中断概率的理论公式,适用于研究不同信道条件的功率优化分配;证明了高信噪比时基于符号错误率和中断概率最小化的最优化功率分配问题是等效的,为相关结论的推广应用提供了理论依据。仿真表明高信噪比条件下,基于推导的中断概率理论公式来实现最优化功率分配是可靠有效的。

Optimal power allocation for amplify- and- forward cooperative relaying system

For wireless communication system with single antenna nodes,cooperative relaying technique can improve system performance efficiently.Optimal power allocation for two hops amplify-and-forward cooperative relaying communication systems in Rayleigh fading channel was studied.The outage probability formula of the cooperative relaying system under high signal-to-noise ratio was derived to investigate the power allocation under different channel condition and the equivalence of optimal power allocation to minimize the SER and outage probability respectively was proved,providing a theoretical basis for the extended application of related OPA conclusions.Simulation result presents the reliability and efficiency of the OPA based on the derived formula.