参数不确定时延超混沌系统的脉冲同步方法研究  

Research on impulsive synchronization approach of parameter uncertain hyperchaotic systems with time-delay

作　　者：罗永健[1] 于茜[2] 张卫东[3] 

机构地区：[1]西安通信学院军事电子工程系,西安710106 [2]西安通信学院研究生管理大队,西安710106 [3]西安通信学院指挥信息系统系,西安710106

出　　处：《物理学报》2011年第11期98-105,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61179002);陕西省自然科学基金(批准号:2011JM8030)资助的课题~~

摘　　要：针对一类参数不确定的异构时延超混沌系统,采用响应系统与驱动系统状态变量误差的线性反馈作为脉冲控制信号,基于Lyapunov稳定性理论实现了超混沌系统的脉冲同步,给出了渐近稳定条件,并构造了一个具有时延的数字保密通信系统.该方案保密性高,鲁棒性强.数值仿真表明系统能快速达到同步,应用混沌密码序列对数字信号进行加密后,信息信号可以在接收端有效地恢复出来.In this paper,based on the Lyapunov stability theory,the impulsive synchronization asymptotic stability condition for different hyperchaotic systems with time delay and parameter uncertainty is first presented by using the linear feedback of state variable error between the slave system and the master system as the impulsive control signal.After the synchronization,a digital communication system with time delay is provided to achieve secure communication.This scheme is of high security and robustness.Moreover,computer simulations show that in the communication system,the synchronization of the systems could be achieved quickly,and by using chaotic cipher sequence to encrypt the digital signal,the useful information signal can be recovered effectively from the receiver.

关 键 词：时延 脉冲同步 数字保密通信 

分 类 号：O415.5[理学—理论物理]