参数切换统一混沌系统的自适应保密通信  

Adaptive secure communication based on unified chaotic systems with parameter switching

作　　者：瞿少成[1] 王晓燕[1] 龚美静[1] 

机构地区：[1]华中师范大学信息技术系,湖北武汉430079

出　　处：《计算机工程与设计》2009年第12期2919-2921,2924,共4页Computer Engineering and Design

基　　金：高等学校博士学科点专项科研基金项目(20070511017)

摘　　要：根据Lyapunov稳定性定理,利用Lyapunov直接法构造非线性函数,通过采用系统参数自适应率和控制器,使得统一混沌系统能够在较短的时间内与参数切换的驱动统一混沌系统达到同步,利用基于Matlab的Simulink技术进行数值仿真,并将自适应同步的统一混沌系统应用到混沌掩盖保密通信中。仿真结果表明,响应统一混沌系统能够快速跟踪参数随机切换的驱动统一混沌系统并达到同步,混沌掩盖通信系统中有用信号能够在接受端得到有效的恢复。Based on Lyapunov stability theory and used the Lyapunov＇s direct method by designing a nonlinear function in the response system, a system parameter adaptive rate and proper controller are used to realize the synchronization between the response chaotic system and any drive system with parameter switching in finite time. The technique of Similink based on Matlab is used for numerical simulations, and the adaptively synchronized unified chaotic systems are applied to chaotic masking secure communication. Simulations show that the response system of unified chaotic systems can quickly track the drive system with parameter switching and achieve synchronization, and the useful signal is recovered from the receiver effectively.

关 键 词：统一混沌系统 参数切换 自适应 混沌掩盖 保密通信 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]