摘要
现阶段有关混沌保密的研究主要通过注入混沌信号的相干光完成通信保密,无法有效解决参数失配现象,且通信过程中的信息容量会受带宽约束。为此,提出一种新的基于共同混沌信号注入的激光通信信息双向保密系统。设计系统总体结构,分析理论模型,设计共同混沌信号注入同步模块,实现接收端与发射端的耦合反馈。通过非线性薛定谔耦合方程表示混沌载波,借助共同混沌系统注入技术保证同步性。将共同混沌信号注入作为依据,在进行双向保密处理的过程中,通过混沌掩盖、混沌调制和混沌键控三种保密方式把激光通信信息调制至发射端输出的混沌载波中,经信道后,一部分被注入接收端,负责实现混沌同步,其它负责解调激光通信信息,实现激光通信信息双向保密。实验结果表明,系统保密效果好,误差低。
At present,the research on chaos confidentiality is mainly to complete communication secrecy by injecting coherent light from chaotic signals,which can not effectively solve the mismatch of parameters,and the information capacity in the process of communication will be constrained by bandwidth. Therefore,a new bidirectional information security system for laser communication based on common chaotic signal injection is proposed. The overall structure of the system is designed and the theoretical model is analyzed. The common chaotic signal injection synchronization module is designed to realize the coupling feedback between the receiver and the transmitter. Chaotic carrier is represented by nonlinear Schrodinger coupling equation,and synchronization is ensured by common chaotic system injection technique. The common chaotic signal injection is used as the basis. In the process of bidirectional secret processing,the laser communication information is modulated into the chaotic carrier of the emitter output through three ways of chaos concealment,chaotic modulation and chaos keying. After the channel,a part is injected into the receiver,which is responsible for the realization of chaotic synchronization and other negative effects. The laser communication information is demodulated and the two-way information of laser communication information is secrecy. The experimental results show that the system has good security effect and low error.
作者
赖清
曾红武
林已杰
LAI Qing;ZENG Hongwu;LIN Yijie(Chongqing medical university institute of medical information,Chongqing 400016,China)
出处
《激光杂志》
北大核心
2018年第12期170-174,共5页
Laser Journal
基金
重庆市科技计划重大专项项目(No.cstc2015shms-ztzx10011)
重庆医科大学校级课题(No.201717)
关键词
共同混沌信号
激光通信
信息
双向保密
系统
common chaotic signal
laser communication
information
two-way security
system
