基于一个混沌系统的保密通信及其电路实现的研究  

Study on secure communication and circuit implementation for a chaotic system

作　　者：杨留猛[1] 俞建宁[1] 安新磊[1] 张建刚[1] 张文娟[1] 

机构地区：[1]兰州交通大学数理与软体工程学院,兰州730070

出　　处：《四川大学学报（自然科学版）》2014年第3期499-506,共8页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金项目(11161027);甘肃省自然科学基金项目(1010RJZA067);教育部项目(212180)

摘　　要：构造一个具有复杂混沌吸引子的非线性混沌自治三维系统,对该系统的基本动力学行为进行了研究,得到了系统的分岔图和Lyapunov指数谱图,并且通过电路验证了吸引子的存在性.根据线性反馈同步理论对新系统进行同步控制,以Multisim为仿真平台构造出基于混沌系统的保密通信电路.通过加入随机白噪声干扰,观察还原信号的失真程度.仿真结果表明,在小强度噪声干扰下,混沌信号仍然能够完成对信息的有效掩盖,实现了由理论模型向现实应用的转化.The nonlinear chaotic autonomous three-dimensional system is algebraically simple but can generate complex chaotic attractors. The system is analyzed by studying bifurcation diagram and Lya- punov exponent spectrum. The circuit proves the existence of attractor. The new system is applied to secure communication circuit using linear feedback synchronization control and Multisim simulation software. In consideration of the interfering of white noise, the result of encoding is simulated for secure communication circuit. The simulation results show that desired signal information still is effectively a- ble to be masked by chaotic signal, which realizes the transformation from theoretical model to real application.

关 键 词：混沌 同步 电路仿真 保密通信 

分 类 号：O322[理学—一般力学与力学基础]