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为了实现稳定的、可以同时同步的多点混沌通信,提出一种基于光电反馈延迟的双向混沌通信模型和多点耦合的混沌同步模型。在双向混沌通信模型中引入了时间延迟和混沌调制信息加密技术,增加了系统的安全性。数值分析了系统的同步性能、安全性能和通信性能,研究结果表明,系统能够历经很短的时间实现高质量的、稳定的同时同步,实现双向通信。并且延迟时间、信息信号功率、激光器光信号功率、相位的改变在其他参数匹配的情况下,不会降低系统的同步性能,即系统的信息信号功率、光信号功率、延迟时间、相位均可作为系统的密钥,提高系统的安全性。这种双向混沌通信模型可以拓展为符合一定拓扑结构的多点耦合混沌通信模型,并且推测随着网络中节点数的增加,系统的复杂度增加。
In order to achieve a stable multi-point chaotic communication that can be simultaneously synchronized, a bi-directional chaotic communication model based on photoelectric feedback delay and a chaotic synchronization model with multi-point coupling are proposed. In the two-way chaotic communication model, time delay and chaos modulation information encryption technology are introduced to increase the security of the system. Numerical analysis of the system’s synchronization performance, safety performance and communication performance, the results show that the system can be achieved in a very short period of time to achieve high-quality, stable synchronization, to achieve two-way communication. And the delay time, the power of information signal, the change of power and phase of the laser optical signal will not reduce the synchronization performance of the system when other parameters are matched. That is, the information signal power, optical signal power, delay time and phase of the system can be regarded as System keys to improve system security. This two-way chaotic communication model can be extended to a multi-point coupled chaotic communication model with a certain topological structure, and it is speculated that as the number of nodes in the network increases, the complexity of the system increases.