基于多广义函数混沌同步的数字信号传输方案

Digital communication based on multistep generalized chaotic synchronization

讨论的是混沌保密通信问题。在多广义混沌同步和间歇偶合思想基础上提出了一种数字信号传输方案。在信号传输过程中,每个信号周期被分为两部分21,TT,分别用于实现同步和信号解调。通过随机选择广义函数和21,TT的大小,大大提高了信息传输的安全性能。分析了21,TT与安全性能和信息解调精度的关系。数值仿真表明效果良好。

We discussed the topic of chaotic secure communication. A scheme for digital signal transmission based on multistep generalized chaotic synchronization and occasional coupling is proposed,where the generalized function is chosen in a special way. In the process of signal transmission, the period of every signal bit is divided into two parts: T1 and T2. During T1, generalized chaotic synchronization is achieved, and in T2, the main task is to extract the transmitted signal. By choosing generalized function and T1, T2 properly, security is greatly enhanced. We also analysis the effect of T1, T2 on security and demodulating performance. Numerical simulations are performed to show the effectiveness of this communication scheme.