作　　者： ; ; ; ;

机构地区： 华南理工大学电子与信息学院

出　　处： 《电路与系统学报》 2011年第6期24-29,共6页

摘　　要： 为解决多跳OFDMA系统的资源分配问题,本文提出一种基于比例公平的资源分配算法,该算法将一个联合优化的问题分解为两个步骤,首先在等功率分配的条件下求出最优的子载波分配以及中继节点选择方案,然后再根据注水定理进行功率分配,以提高系统的性能。仿真结果表明,该算法能够在保障不同用户间公平性的条件下,有效地提高系统的容量。 This paper studies the problem of resource allocation strategy in multihop OFDMA systems, a proportional fair based resource allocation algorithm is proposed. The problem of joint resource allocation is divided into two steps. In the first step, the optimal subcarrier assignment and relay selection scheme are determined based on equal power allocation. In the second step, the optimal power allocation is achieved by waterfilling theorem to further increase the system performance. Simulation results show that the proposed algorithm performs a good tradeoff between system capacity and fairness.

关 键 词： 正交频分多址接入 多跳 资源分配 比例公平

领　　域： [电子电信] [电子电信]