一种用户速率受限OFDM系统中的联合子载波和功率分配算法  

A radio resource allocation algorithm using dual decomposition for OFDM downlink systems

作　　者：金慈航[1] 卫国[1] 张力力[1] 

机构地区：[1]中国科学技术大学无线网络通信安徽省重点实验室,安徽合肥230027

出　　处：《中国科学技术大学学报》2009年第11期1158-1163,1170,共7页JUSTC

基　　金：国家重点基础研究发展(973)计划(2007CB310602)资助

摘　　要：为OFDM下行系统提出一种高性能、低复杂度的无线资源分配算法.该算法在保证各用户最小数据速率限制的情况下,最大化系统的总吞吐量.算法以对偶优化作为理论基础,经过合理简化,消除了以往求解优化问题中所需的迭代运算,提出一种新型的低复杂度无线资源分配算法.仿真结果表明,在各种无线环境中,该算法均提供了很好的系统吞吐量和中断概率性能.A highly efficient and low-complexity radio resource allocation algorithm was proposed for the downlink OFDM system. The goal of the presented algorithm is to maximize the system throughput while maintaining each user＇s minimum data rate constraint. Based on the dual optimization methods, the algorithm eliminated the iterations by reasonable simplification and reduced the complexity remarkably. Numerical results show that our algorithm provides high throughput in various wireless environments with much lower feedback overhead.

关 键 词：对偶优化 正交频分复用 无线资源分配 功率控制 子载波分配 

分 类 号：TP929.5[自动化与计算机技术]