华南理工大学学报(自然科学版) ›› 2005, Vol. 33 ›› Issue (11): 61-65.

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基于遗传算法的多用户OFDM系统资源分配

王永学 陈芳炯 韦岗   

  1. 华南理工大学 电子与信息学院,广东 广州 510640
  • 收稿日期:2005-01-05 出版日期:2005-11-25 发布日期:2005-11-25
  • 通信作者: 王永学(1975-),男,博士生,主要从事下一代移动通信技术研究 E-mail:wyxjohn@163.com
  • 作者简介:王永学(1975-),男,博士生,主要从事下一代移动通信技术研究
  • 基金资助:

    国家自然科学基金资助项目(60402014);广东省自然科学基金资助项目(31390)

Resource Allocation for Multiuser OFDM System Based on Genetic Algorithm

Wang Yong-xue  Chen Fang-jiong  Wei Gang   

  1. College of Electronic and Information Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-01-05 Online:2005-11-25 Published:2005-11-25
  • Contact: 王永学(1975-),男,博士生,主要从事下一代移动通信技术研究 E-mail:wyxjohn@163.com
  • About author:王永学(1975-),男,博士生,主要从事下一代移动通信技术研究
  • Supported by:

    国家自然科学基金资助项目(60402014);广东省自然科学基金资助项目(31390)

摘要: 针对多用户正交频分复用(OFDM)系统,提出利用遗传算法搜索使系统发射功率最小的子载波和比特分配,并通过在遗传算法的初始群体中加入具有优秀基因的个体,使遗传算法快速收敛,从而降低了算法复杂度.仿真结果表明,与静态子载波分配算法(时分复用和频分复用)相比,所提出的算法有较大的增益(5~l5 dB),且优于其他动态分配算法(1~2dB).

关键词: 遗传算法, 正交频分复用, 时分复用, 频分复用

Abstract:

A genetic algorithm-based algorithm is proposed for multiuser OFDM (Orthogonal Frequency Division Multiplexing)system to acquire the subcarrier and bit allocation that needs the least transmitting power.By adding some good-gene individuals to the initial population,the convergence speed of the genetic algorithm is greatly im-proved and the complexity of the algorithm is decreased.Simulated results show that,compared with static subcarri-er allocation schemes,namely,TDMA(Time Division Multiplexing Access)and FDMA(Frequency Division Mul-tiplexing Access),the proposed algorithm is of a considerable plus of 5~1 5 dB,which is greater than that obtained by any other dynamic allocation algorithms(1~2 dB).

Key words: genetic algorithm, O~hogonal Frequency Division Multiplexing(OFDM), Time Division Multiplexing Access(TDMA), Frequency Division Multiplexing Access(FDMA)