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新型超混沌系统的错位投影同步及在保密通信中的应用

, PP. 13-18

Keywords: 错位投影同步,超混沌系统,非线性反馈控制器,保密通信

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Abstract:

提出了一种新型的混沌系统错位投影同步方案,实现驱动系统与响应系统中所有状态向量的相互错位投影同步,即状态向量不是按照原有的对应关系成比例投影同步.这里以新型的四维超混沌Tang系统和Qi系统为例,研究两种错位投影同步方案.基于Lyapunov系统稳定性理论,构造合适的非线性反馈控制器,分别实现了超混沌系统的同结构和异结构的错位投影同步.然后,利用改进的混沌掩盖方法,将该同步方案应用到保密通信中,在发送端将混沌信号与信息信号加密并发送,最后从接收端系统中不失真地恢复出有用信号,数值仿真结果表明了该方案的可行性和良好的保密特性.

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