基于混沌导频信号同步控制的混沌保密通信

Secure communication based on chaotic pilot signal controlling chaotic synchronization

分析了现有混沌掩盖保密通信存在的问题,给出了混沌同步控制信号与混沌调制信号相分离的混沌保密通信新方法。新方法采用混沌导频信号独立完成通信收发两端的混沌系统同步控制,较好地解决了原有混沌通信系统中已调信号既实现同步控制又承载信息信号所引起的信息信号须远小于混沌调制信号和抗噪声性能差的问题。构建了采用Sprott系统I为混沌模型的混沌通信新方案仿真电路。仿真实验表明:通信收发两端混沌同步控制实现方式更灵活、混沌同步更精确、信息信号大小不再受混沌信号影响、抗噪声性能更强。同时,混沌调制信号和混沌同步控制信号分开也有助于这两方面技术独立地研究与发展,有利于构建性能更好的混沌保密通信系统。

This paper analyzed the problem of the existed chaotic masking secure communication, gave a new chaotic commu- nication method with the separation between chaos synchronization control signal and chaos modulated signal. It used a chaotic pilot signal independently to synchronize the chaos of the communication transceiver, it was a better solution for the original chaotic communication systems in which the information signal was much smaller than the chaotic modulation signal and anti- noise performance was poor. It buit the circuit simulation based on Sprott system to verify the new method of chaotic communi- cation. Simulation results show that it is more flexible to achieve synchronization between communication terminals, more ac- curate for chaos synchronization, high performance of anti-noise, and the strength of the information signal is no affected by the chaotic signal.