Open AccessA method for generating chaotic spread-spectrum sequences and their optimized selection algorithm
Author(s) -
Yu Zhen-Biao,
Jun Feng
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.1409
Subject(s) - chaotic , spread spectrum , logistic map , algorithm , selection (genetic algorithm) , sequence (biology) , computer science , interference (communication) , direct sequence spread spectrum , spectrum (functional analysis) , code division multiple access , channel (broadcasting) , telecommunications , artificial intelligence , physics , quantum mechanics , biology , genetics
A method for generating chaotic spread-spectrum sequences based on the combined chaotic map is proposed. An optimized selection algorithm based on the property requirement of spread-spectrum sequences and the performance index of multiple access interference is also presented. Simulation is performed for the optimized chaotic sequence, and an optimized logistic sequence is applied to a direct sequence spread-spectrum CDMA system under different channel conditions. The results show that the chaotic spread-spectrum sequences generated by the proposed method have similar performance as the logistic spread-spectrum sequences and have better security.