基于全光混沌注入双环电光相位反馈环的混沌保密通信系统研究  

Research on chaotic secure communication system based on all optical chaos injection double-loop electro-optical phase feedback loop

作　　者：周雪芳[1] 王飞 杨国伟[1] 毕美华[1] 许蒙蒙 胡淼[1] ZHOU Xuefang;WANG Fei;YANG Guowei;BI Meihua;XU Mengmeng;HU Miao(School of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《通信学报》2024年第7期138-147,共10页Journal on Communications

基　　金：浙江省重点研发计划基金资助项目(No.2022C03037)。

摘　　要：针对现有混沌保密光通信系统时延特征隐藏所需反馈增益系数较大这一问题,设计了一种基于全光混沌注入双环电光相位反馈环的混沌保密通信系统。首先,由全光反馈产生光混沌并将其耦合至2个电光相位混沌反馈环中。然后,通过相位调制的方式实现信息与混沌载波的非线性耦合并参与混沌载波的生成。最后,在检测端通过光混沌同步实现信号的解密。借助MATLAB软件仿真分析了系统中混沌信号的复杂度、时延特征隐藏、同步性、鲁棒性和通信性能。仿真结果表明,所设计的混沌保密通信系统在较小的反馈系数时具有较高的复杂度且时延特征得到较好的隐藏。To solve the problem of large feedback gain coefficient required for delay feature hiding in existing chaotic secure laser communication systems,a chaotic secure communication system based on all optical chaos injection double-loop electro-optical phase feedback loop was designed.Firstly,optical chaos was generated by all optical feedback and coupled to two electro-optic phase chaos feedback loops.Then,the nonlinear coupling of information and chaotic carrier was achieved through phase modulation to participate in the generation of chaotic carrier.Finally,the signal was decrypted by optical chaos synchronization at the detection end.The complexity,TDS hiding,synchronization,robustness and communication performance of chaotic signals in the system were analyzed by MATLAB software.The results demonstrate that the designed chaotic secure communication system has higher complexity and the TDS are completely hidden when the feedback coefficient is small.

关 键 词：混沌保密通信 光混沌 光反馈 双反馈环 相位调制 时延特征隐藏 

分 类 号：TN914[电子电信—通信与信息系统] TN918[电子电信—信息与通信工程]