时变信道下基于有效容量的OFDMA系统资源分配方案

摘要

The effective capacity of the multi-user OFDMA (Orthogonal Frequency-Division Multiple Access)system for time-varying channel is characterized. Then to maximize the system average effective capacity, throughthe Tayler approximation, an asymptotical optimal user scheduling is proposed, which selects users based on therelationships among the moving speed, traffic profile and the effective capacity. By means of simulations, it isfurther shown that the proposed scheme can improve the effective capacity of the mobile hosts.%该文给出时变信道下多用户正交频分多址接入(OFDMA)系统的有效容量表达式.为了最大化系统平均有效容量,该文利用泰勒近似得到了渐近可达的多用户调度准则,根据用户移动速度、业务时延敏感特性和有效容量的关系调度用户.仿真结果表明,该方案能够更好地提高移动用户有效容量.