Title :
Sequences optimization in DS/CDMA systems using genetic algorithms
Author :
Chan, Tak Ming ; Kwong, Sam ; Man, Kim Fung ; Tang, Kit Sang
Abstract :
We propose to use the Gold sequences as the spreading sequences that have a family of M=N+2 sequences with sequence length of N. They are constructed from any preferred pair of m-sequences and we choose a subset of sequences from the family of Gold sequences such that multiple access interference (MAI) is minimized. Furthermore, a search method based on a genetic algorithm (GA) is proposed to find the optimal solution, owing to its powerful search ability. Experimental results showed that the MAI can be greatly reduced after a proper sequence selection
Keywords :
code division multiple access; genetic algorithms; m-sequences; minimisation; mobile radio; radiofrequency interference; spread spectrum communication; DS-CDMA systems; Gold sequences; code division multiple access; genetic algorithms; m-sequences; minimization; mobile communications; multiple access interference; optimal solution; sequence optimization; spreading sequences; Biological cells; Bit error rate; Genetic algorithms; Genetic mutations; Gold; Machine assisted indexing; Multiaccess communication; Multiple access interference; Performance evaluation; Search methods;
Conference_Titel :
TENCON 2001. Proceedings of IEEE Region 10 International Conference on Electrical and Electronic Technology
Print_ISBN :
0-7803-7101-1
DOI :
10.1109/TENCON.2001.949687
