基于超混沌Lorenz系统同步控制的保密通信

摘要

借鉴Lyapunov稳定性理论,通过对系统的某一状态施加线性牵制控制,实现超混沌Lorenz系统的同步,并将超混沌同步技术用于保密通信.在发送端,将有用信号调制到混沌参数中,使其完全融入混沌系统,提高通信的安全性,在接收端,利用设计合理的滤波器解调出有用信号.仿真结果表明,设计的系统同步性良好,解调信号逼近于有用信号.%Based on Lyapunov stability theory, this paper designs a linear pinning controller to achieve the synchronization of two hyper-chaos Lorenz systems. The dynamic process of synchronization is discussed by the quantitative analysis. Chaos synchronization technology is applied in secure communication. At the transmitter, the signals are modulated into parameter of the chaotic system so that the signals completely hide into hyper-chaos system, which can improve the communication security. At the receiver, a reasonable filter is constructed to demodulate communication signal. Simulation results show that the system is effective and the retrieved signal is close to source signal.