基于双光电延迟反馈装置的双向混沌保密通信系统  

A Bidirectional Chaotic Secure Communication System Based on Optoelectronic Delay Devices with Double Feedback

作　　者：操良平[1] 董晓云[2] 梁兴连[1] 王泽钰[1] 

机构地区：[1]重庆师范大学教育科学学院,重庆401331 [2]重庆师范大学初等教育学院,重庆400700

出　　处：《西南大学学报（自然科学版）》2013年第3期161-167,共7页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11204248);重庆市自然科学基金资助项目(2012jjA40012)

摘　　要：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.In this paper, a bidirectional chaotic secure communication system based on optoelectronic delay devices with double feedback is presented, and the synchronization characteristics and the communication performances of such a system are numerically investigated. The results show that the chaotic outputs of this system become more complex and have larger bandwidth, which is helpful for improving the commu- nication capacity and system security; when the parameters of the two lasers and the two modulators are matched, good-quality chaos synchronization with zero lag time and simultaneous bidirectional transmis- sion can be realized and when the parameters of the system are mismatched, the synchronization quality and communication performance are affected to a certain extent, but the system possesses good robustness against the mismatched parameters and can still realize bidirectional chaos communication within a certain mismatched parameter range.

关 键 词：双光电反馈 混沌同步 双向通信 半导体激光器 马赫-曾德尔调制器 

分 类 号：TN248.4[电子电信—物理电子学] TN918.91