文档介绍：基于混沌序列的扩频通信仿真及Simulink实现
本文研究了混沌序列的特性,它具有确定的、随机的和不可预测的特征,扩频通信技术由于其本身具备的优良性能而得到广泛应用,是未来无线通信系统中的关键技术。使用不同的类噪声编码,不同通信用户可工作在在同一频段、同一工作时间,扩频通信信号不易受干扰,也不容易干扰他人,信号隐蔽,有保密性。多重扩频信号能共同使用同一频段,可采用随机多址通信方式,通信寻址简单方便,有较好的过负荷能力,能和其他的通信方式混合使用。本文搭建了产生混沌序列的Simulink仿真模型,并且把该模型应用于直扩通信系统,仿真实现了基于混沌序列的直接扩频系统,仿真出了各种波形,得出了与理论推导相符的结果,利用混沌序列作为扩频序列的扩频系统可以有效提高通信系统可靠性和抗干扰能力,具有较强的理论研究意义和实际应用价值。
关键词
混沌序列;通信仿真;扩频通信
Abstract
The performance of the chaos sequence was studied in this article,it is definite,unpredictable and random. Spread spectrum technology used widely because of the excellent is the key technologies in future munication a different class noise code, munication users at the same frequency band, the same working hours, spread munication,signal is less susceptible to interference, not easy to interfere with any others. Signal hidden confidentiality, multiple spread-spectrum signal using the same frequency band can be random multiple munications addressing easy, it has a good capability of overload and use with other means munication model to generate chaos sequences was designed and also applied to direct sequence spread spectrum (DSSS) communication system; this paper also simulated munication system based on chaos sequence by designing simulink modules,some simulation experiments were also implemented. By theories studying and experimental simulation,it is obvious that chaos spread spectrum sequence can improve munication system reliability and Antijamming capability,with a strong theoretical research and practical application value.
Key words
Chaos sequence ; Communications simulation ;Spread munication
目录
摘要 I
Abstract II
前言 1
第一章扩频理论的基础 2
扩频通信系统的产生和发展过程 2
扩频技术的研究现状 3
扩频系统的概况 4
扩频技术的展望 6
本章小结 9
第二章混沌信号理论及其在扩频中的原理 11
混沌研究的历史 11
混沌同步及其应用 12
混沌扩频通信 13
本章小结 14
第三章基于混沌序列的扩频通信系统 15
MATLAB语言简介 15
混沌序列扩频通信原理框图 16
混沌序列性质分析 17
混沌序列发生器的设计 18
基于混沌序列的扩频仿真模型设计 19