【摘要】 以Lyapunov稳定性理论为基础,针对一系列非扩散混沌系统,提出一种三个不同沌系统之间的异结构同步方法.就混沌通信问题,提出了一种多级混沌保密通信系统的实现法,在前两个同步的系统中加密后,利用后两个同步系统再一次加密.通过加入高斯白噪声扰,对多级混沌保密通信系统进行噪声干扰的分析和计算,并用小波分析理论对加噪信号进处理.仿真结果表明,有用信号的传输在噪声的干扰下发生畸变,经小波分析理论处理后,用信号可以无失真地恢复过来.更多还原

【Abstract】 Based on Lyapunov stabilization theorem,a method is proposed for global chaos synchronization among three different structures chaotic systems global synchronization is shown.Then this method is applied to secure communication through chaotic masking,used three coupled identical system,propose a novel method of chaos encryption,after encrypting in the first two coupled systems,do it again in the later two coupled systems.In consideration of interfering Gauss noise,the results of encoding and decoding are simulated and analyzed for the multistage chaos synchronized system.Analyzes the characteristics of noise and then presents a de-noising method which takes wavelet.With the Matlab,the effects of signal de-noising could be demonstrated.更多还原