非等效信道增益下混合中继转发机制系统功率分配方案

Power Allocation Scheme for Hybrid Relay Systems Based on the Non-Equivalent Channel Gain Model

文中研究了一种功率分配方案使得系统在放大转发和译码转发的混合中继机制下能够获得最大的系统能效。在非等效信道增益系统模型下,对放大转发机制和译码转发机制进行自适应选择,同时利用最优功率分配算法对各子载波分配功率,从而能够克服两种单一转发机制下系统存在的弊端,提高中继转发系统的能效和资源利用率。由数据分析仿真可知,当混合中继系统信道增益值不断增长,混合中继转发机制下的系统模型与传统的AF中继机制和DF中继机制模型相比,系统能效分别提高了40%和10%以上,充分说明了该系统的优越性。

In this paper,apower allocation scheme is studied to obtain the maximum system energy efficiency of the system under the hybrid relay system with amplify and forward and decode and forward.Under the non-equivalent channel gain system model,the amplify and forward mechanism and the decode and forward mechanism are adaptively selected,and the optimal power allocation algorithm is used to allocate the power of each subcarrier,so as to overcome the disadvantages of the system under the two single forwarding mechanism,improve the energy efficiency and resource utilization.Showed by data analysis simulation,when the mixed relay system channel gain increases,the mixed relay mechanism system model and traditional AF relay mechanism and DF relaying mechanism model were increased by more than 40% and 10% compared with the energy efficiency of the system,which fully explains the superiority of the system.