OFDMA系统资源分配算法研究  

Research on resource allocation algorithm for OFDMA system

作　　者：张青波[1,2] 黄国刚[2] 何加铭[2] 

机构地区：[1]浙江工商职业技术学院机电工程学院,浙江宁波315012 [2]宁波大学通信技术研究所,浙江宁波315211

出　　处：《机电工程》2009年第10期6-9,共4页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(60671037);国际科技合作与交流专项资助项目(2008KR1041);宁波市工业攻关国际合作资助项目(2007B10051)

摘　　要：为解决正交频分多址接入(OFDMA)系统目前存在的子载波、比特和功率等资源的分配算法复杂度高的问题,提出了一种低复杂度的解决方案。其中,比特分配采用香农算法,并给出了优化策略;子载波分配算法利用多用户频率分集来提高信道容量;功率分配算法基于实时性更好的路径损耗补偿法,使得算法的整体复杂度降低,最终实现了系统资源的合理分配。仿真结果表明,采用该算法可以进一步降低系统误码率,提高实时性,同时算法复杂度也有较大降低。To solving the problem of present high-complexity resource-allocation algorithm of bit, subcarrier and power in orthogonal frequency division multiple access（OFDMA） system, a low-complexity solution was proposed. Bit allocation used Shannon algorithm, and it was optimized. Subcarrier allocation used multi-user frequency diversity to improve channel capacity. Power allocation algorithm used better real-time path-loss compensation method, and it reduced the overall complexity. At last, the rational allocation of system＇s resource was realized by the new algorithm. Simulation results show that new resource-allocation algorithm can further reduce the system＇s bit-error rate, improve real-time performance. At the same time, algorithm＇s complexity is greatly reduced.

关 键 词：正交频分多址接入 比特分配 子载波分配 功率分配 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]