基于QOE效用函数的多用户OFDM系统功率分配算法

摘要

Quality of experience (QOE) is introduced into power allocation algorithm in orthogonal frequency division multiplexing (OFDM) system. A power allocation algorithm based on QOE utility function which targets to max the system average QOE value is proposed. The proposed algorithm uses iterative differential coefficient approaching method in power allocation , in order to gain the max system average QOE value. Simulation results indicate that the algorithm keeps a high system average QOE value while the system capacity and user fairness are balanced based on the power supply-demand relations in OFDM system.%将用户感受质量(Quality of experience,QOE)引入正交频分复用(Orthogonal frequency division multiplexing,OFDM)系统的资源分配算法设计中,并基于QOE构建的效用函数提出了一种以系统平均QOE最大化为目标的功率分配算法.该算法利用导数迭代逼近的方法调整系统功率分配,从而获得接近最大系统平均QOE的功率分配方法.仿真结果表明,该算法在保证较高系统平均QOE指标的同时,能够依据系统功率资源供求情况,兼顾系统和容量与用户公平性指标.