基于goodput优化的OFDMA系统资源分配算法  

A Resource Allocation Algorithm Based on goodput in OFDMA System

作　　者：蒋涛[1] 麦文[1] 查光明[2] 毛苏英[1] 

机构地区：[1]四川师范大学物理与电子工程学院,四川成都610066 [2]电子科技大学通信学院,四川成都610054

出　　处：《通信技术》2010年第6期32-34,共3页Communications Technology

基　　金：四川师范大学青年基金(编号:08QNL11);四川师范大学校科学研究基金

摘　　要：资源分配是OFDMA系统资源调度中的一个重要研究问题。针对OFDMA下行链路信道知识获取的现实误差问题,提出了一种基于实际吞吐量优化的资源分配算法。重点研究了功率和数据率在用户之间的分配问题,以往的很多分配算法通常是假设下行链路发射端具有理想信道信息,这与实际状况不符,同时根据部分信道信息得到的速率分配不被真实的信道支持,会造成传输的中断事件。算法考虑了信道估计的误差问题,将实际吞吐量goodput作为分配算法优化的依据。仿真结果表明,该算法获得了较好的多用户分集增益和实际吞吐量性能。Resource allocation is an important issue in resource scheduling of OFDMA system.Aiming at the actual error problems in obtaining channel information of downlink,a resource allocation algorithm based on goodput is proposed.This paper focuses on the allocation of power and data rate in among the users.Some known algorithms are always based on ideal channel information,and the allocated rate is not supported by actual channel condition,thus causing the outage events.The algorithm considers the errors of channel estimation,and the resource allocation is thus optimized on goodput.Computer simulation shows that the proposed algorithm could acquire fair multi-user diversity gain and goodput performance.

关 键 词：资源分配 正交频分复用 信道估计 实际吞吐量 

分 类 号：TN92[电子电信—通信与信息系统]