一种OFDM系统动态子载波比特和功率分配联合算法  

United Algorithmfor Dynamic Subcarrier ,Bit and Power Allocationin OFDMSystem

作　　者：高欢芹[1] 酆广增[1] 朱琦[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《中国工程科学》2006年第3期62-65,69,共5页Strategic Study of CAE

基　　金：江苏省高校自然科学研究计划资助项目(05KJB510090)

摘　　要：提出一种多用户OFDM(orthogonal frequency division multiplexing)系统下行链路,具有信道变化实时性的动态子载波、比特和功率分配联合算法(UA),在满足各个用户数据速率和BER要求的同时使总的发送功率最小。提出的算法与动态子载波分配算法(WSA)相比,计算复杂度相当,在移动信道环境下仿真结果表明性能有一定的改善。A realtime united algorithm for dynamic subbcarrier, bit and power allocation according to the change of channel （UA） is presented in this paper, which can be used into the down-link of multi-user orthogonal frequency division multiplexing （OFDM） system. With the algorithm the total transmission power is the minimum while the data rate of each user and the required BER performance can be achieved. Comparing to the subcarrier allocation algorithm （WSA）, the simulation results show that the algorithm presented in this paper has better performance while both have equal calculating complexity.

关 键 词：OFDM 动态子载波分配算法(WSA) 联合子载波比特和功率分配算法(UA) 

分 类 号：TN929.5[电子电信—通信与信息系统]