| 摘要: |
| 混沌序列在具有很好随机性的同时,一些序列还具有KroneckerDelta自相关和近似正交的互相关特点,因此被认为是实现直序扩谱CDMA系统较理想的扩谱序列之一,成为近年来研究的热点。文中从异步DS-CDMA系统的模型入手,分析影响CDMA系统性能的关键问题,说明混沌扩谱CDMA系统的性能优点。为了实现混沌扩谱CDMA系统的数值仿真与性能验证,以切比雪夫映射产生的混沌序列为例进行混沌扩谱CDMA系统的性能分析,并与基于Gold和Kasami两种序列的传统DS-CDMA系统进行比较。 |
| 关键词: 异步CDMA,混沌序列,直序扩谱,切比雪夫映射 |
| DOI：10.3969/j.issn.1001-893X. |
| Revised:August 25, 2003 |
| 基金项目:国家自然科学基金项目(60076015)，福建省自然科学基金项目(A0010019)，福建省高新技术项目 |
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| Performance Analysis of Chaotic Spread Spectrum CDMA Systems |
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| Abstract: |
| Chaotic sequence is considered as a good candidate for spread spectrum sequence in CDMA systems because it is characterized by good randomness, Kronecker Delta autocorrelation and orthogonal crosscorrelation. Through asynchronous CDMA system model, the authors analyze the key points of chaotic spread spectrum CDMA system performances,choose Chebyshev map to instantiate the virtue of chaotic sequences and compare with the classic Gold and Kasami sequences. |
| Key words: Asynchronous CDMA,Chaotic sequence,Direct sequence spread spectrum,Chebyshev map |
