摘要
提出了一类在有限区域 [- 1 ,1 ]范围内折叠次数为无限的一维迭代混沌自映射 .分析了该映射的混沌产生机制 ,计算出的 Lyapunov指数表明 ,该混沌映射比一般的有限折叠次数迭代混沌自映射具有更好的混沌特性 .利用该映射生成 CDMA混沌扩频序列 ,能获得比工程实用中常见的 Gold序列性能更加优良的自相关与互相关特性 。
A one dimensional iterative chaotic self map with infinite collapses within the finite region [-1,1] was proposed. The method of generating chaotic signals from the model was analyzed. The calculated Lyapunov exponents indicate that it has better characteristics of chaos than some representative iterative chaotic maps with finite collapses. The Code Division Multiple Access (CDMA) spreading sequences produced by this model can also achieve better autocorrelation and crosscorrelation characteristics than Gold sequences, and it will have important effects in improving the performance of wireless mobile communication systems.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第1期10-12,共3页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金重点项目(69735101)
关键词
混沌
扩频序列
自相关
互相关
chaos
spreading sequences
autocorrelation
crosscorrelation
