基于广义观测器实现混沌系统的同步及信息传输

Realizing the synchronization of chaotic system and information transmission based on generalized observer

将保密通信问题看成是信息信号同步问题,从全新的角度提出了一种基于广义观测器的保密通信系统。首先在不改变混沌发送系统的混沌特性的前提下,将信息信号注入到混沌发送系统中,并将其看作系统的状态量;然后在接收端设计广义观测器;最后根据发送端传来的隐藏有信息信号的混沌输出信号同步出混沌系统的状态和信息信号。此方法不需要单独设计加密解密算法,而是将收发端混沌系统的同步与信息传输用同步方法一次实现。对R&o&ssler系统的仿真证明了该方法的有效性。

A chaotic secure communication system based on generalized observer is proposed from a brand-new point of which, the problem of secure communication is regarded as that of synchronizing information signals. Firstly, the information signals are injected into the chaotic transmitter and regarded as state variables without changing the chaotic characteristic of chaotic transmitter; secondly, the generalized observer is designed at the receiving end; lastly, chaotic state variables and information signals are synchronized by means of chaotic output signals including information signals. It is unnecessary to design encryption arithmetic and decryption arithmetic solely： synchronization and information transmission between chaotic transmitter and receiver based on synchronizing method are realized simultaneously. The simulation result for Rossler system shows the validity of this method.