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提出了基于双光电延迟反馈装置的双向混沌保密通信系统,数值研究了系统的同步特性及通信性能.结果表明,系统输出的混沌波具有更宽的频带和更为复杂的频谱,有利于提高通信容量和系统的保密性;当两个激光器和两个调制器的参数一致时,能获得无延时的高质量混沌同步,并实现实时双向通信;参数失配对系统同步性能和通信质量有一定影响,但在一定的参数失配范围内,系统仍能实现较好的双向混沌通信.
The bi-directional chaotic secure communication system based on double photoelectric delay feedback device is proposed, and the synchronization characteristics and communication performance of the system are numerically studied. The results show that the chaotic waves output by the system have wider frequency band and more complex frequency spectrum, Capacity and system confidentiality. When the parameters of the two lasers and the two modulators are consistent, high-quality chaos synchronization without delay can be achieved and real-time bidirectional communication can be achieved. The parameter mismatch has certain influence on the synchronization performance and communication quality of the system , But the system can still achieve better bi-directional chaos communication within a certain parameter mismatch.