超混沌M-G系统参数辨识及其在通讯中的应用

连续时滞混沌系统是无穷维系统,这样的系统可产生具有多个正的Lyapunov指数的超混沌现象,因此系统可产生复杂的时间序列.这个特征使它特别适用于保密通讯.基于此分析,首先本文对M-G超混沌系统的c参数进行辨识研究,给出一种辨识M-G系统c参数的新方法.然后,尝试用欲传输的信号对系统的c参数进行调制,在接收端利用本文提出的参数辨识方法来解调,从而实现数字信号的保密通信.最后大量仿真发现,当辩识的收敛时间小于数字脉冲的持续时间时,本文的方法可以很好的进行解调.

A New Method of Parameter Identification of Time-Delay Hyperchaotic M-G System with Application to Communication

Continuous time delay chaotic system is the infinite dimensional system which can produce several positive Lyapunov exponents,so such system can produce complex time sequences.This character make it suitable to be applied to secure communication.Based on this analysis,in this paper we first research on the identification of C parameter in M G hyperchaotic system and propose a new method of identifying C parameter in M G system.Secondly we attempt to modulate C parameter of this system using the message signal in the transmitter,and at the receiver the message signal is demodulated by using our method of parameter identification.Thus we realize the secure communication.The numerical simulations show that the proposed method can demodulate the message signal well when the convergence time of identification is smaller than the duration of the digital signal.