2006•Journal of Kunming University of Science and TechnologyRequires access

Logistic Chaotic Spread Spectrum Sequences and Its Function Analysis in DS-CDMA System

Jian Zhang

Abstract

A kind of chaotic spread spectrum sequencesLogistic map is studied,and its sensitivity,correlation and balance are analyzed.Based on the theory,the influence of spread spectrum sequence correlation on MAI(Multiple Access Interference)for DS-CDMA communication system is discussed.The result of computer simulation shows that the DS-CDMA communication system with chaotic sequence can sharply degrade the bit error ratio(BER)and improve the performance,compared with the pseudorandom number sequence.

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Key concepts: Spread spectrum, Chaotic, Code division multiple access, Pseudorandom number generator, Pseudorandom noise, Sequence (biology), Direct-sequence spread spectrum, Computer science