Abstract: Aiming at the multi-user diversity characteristic of Orthogonal Frequency Division Modulation(OFDMA) system, an adaptive resource allocation algorithm based on Quality of Service(QoS) is proposed. The algorithm adopts simple equal power distribution because of the multiuser-diversity and the Adapt Modulation Coding(AMC), so the algorithm complexity is distinctly reduced. Simulation results indicate that the proposed algorithm has better system performance on users QoS satisfaction and user fairness although it sacrifices a little system throughput.

Key words: Orthogonal Frequency Division Modulation(OFDMA), subcarrier allocation, power allocation, Quality of Service(QoS), user fairness

摘要： 针对正交频分多址(OFDMA)系统多用户分集的特点，提出一种基于用户服务质量(QoS)的自适应资源分配算法。利用多用户分集增益和自适应调制编码对功率进行平均分配，从而降低算法的复杂度。仿真结果表明，该算法虽然使系统吞吐量略有减小，但在用户QoS保证与用户公平性方面均有较大的性能提升。

关键词: 正交频分多址, 子载波分配, 功率分配, 服务质量, 用户公平性

CLC Number: 

• TP393