Adaptive subcarrier and bit allocation for multiuser OFDM system based on genetic algorithm

Author

Wang, Yongxue ; Chen, Fangjiong ; Wei, Gang

Author_Institution

Coll. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

Volume

1

fYear

2005

Firstpage

242

Abstract

An adaptive subcarrier and bit allocation method based on genetic algorithm for multiuser OFDM system is proposed. With the goal of minimize the overall transmit power while ensuring the fulfillment of each user´s rate and bit error rate (BER) requirement, our algorithm acquires the needed allocation through genetic search. We also improve the convergence of the genetic algorithm through the method of adding some individuals with ´good´ genes to the initial population. Simulation results show that the proposed algorithm outperforms static subcarrier allocation schemes TDMA and FDMA considerably in multiuser OFDM system and is better than the algorithm in Zhang (2004).

Keywords

OFDM modulation; adaptive control; channel allocation; convergence of numerical methods; error statistics; frequency allocation; genetic algorithms; minimisation; multiuser channels; search problems; BER; adaptive subcarrier allocation; bit allocation; bit error rate; convergence; genetic algorithm; genetic search; multiuser OFDM; transmit power minimization; Bit error rate; Bit rate; Convergence; Frequency division multiaccess; Genetic algorithms; Iterative algorithms; OFDM modulation; Radio spectrum management; Resource management; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems, 2005. Proceedings. 2005 International Conference on

Print_ISBN

0-7803-9015-6

Type

conf

DOI

10.1109/ICCCAS.2005.1493402

Filename

1493402