Security of polarization-shift keying chaos optical communication system

被引：6
作者：
Fang N. [1 ]
Wang L. [1 ]
Guo S. [2 ]
Huang Z. [1 ]
机构：
[1] School of Communication and Information Engineering, Shanghai University, Shanghai
[2] College of Information and Engineering, Zhejiang University of Technology, Hangzhou
来源：
Frontiers of Optoelectronics in China | 2008年 / 1卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
false nearest neighbors (FNN) method; fiber ring laser; optical communication; polarization-shift keying (PolSK) modulation; security; strange attractor; the largest Lyapunov exponent; Wolf's method;
D O I：
10.1007/s12200-008-0009-1
中图分类号：
学科分类号：
摘要：
To evaluate the security of a chaos optical communication system employing the polarization-shift keying (PolSK) modulation technology, its chaos characteristic needs to be verified. In this paper, an analysis was done for the signal of this system. Three methods were used to judge whether the signal was maintaining chaos characteristics or not: watching the strange attractor in three-dimensional phase space, computing the largest Lyapunov exponent by the equation which meets and Wolf's method, and evaluating the self-power spectrum density function. As a result, the strange attractor was clearly watched, the largest Lyapunov exponent was positive 0. 0364 and 0. 0106 respectively, and the self-power spectrum was wide and continuous with the noise background. The evaluation of chaos for the signal transmitted in the system is therefore presented. On the other hand, the minimal embodied dimension of the signal was given by the false nearest neighbors (FNN) method and it reached 6, which showed the higher dimension chaos characteristics of the system. Adding the analysis of the ability of anti-attack for the system, it is concluded that the system has higher security than the normal chaos masking schemes. © 2008 Higher Education Press and Springer-Verlag GmbH.
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收藏
页码：64 / 69
页数：5
相关论文
共 13 条
[1]  
Yan S., High rate chaos secure communication system of multiple quantum well lasers, Acta Optica Sinca, 25, 2, pp. 179-185, (2005)
[2]  
Yan S., He L., Wu H., Et al., Studies on method of phase shift controlling chaos for dual ring erbium doped fiber lasers, Chinese Journal of Lasers, 32, 5, pp. 642-646, (2005)
[3]  
Yan S., All-optical chaotic MQW laser repeater for long-haul chaotic communications, Chinese Optics Letters, 3, 5, pp. 283-286, (2005)
[4]  
van Winggeren G.D., Roy R., High-speed fiber-optic polarization analyzer: measurements of the polarization dynamics of an erbium-doped fiber ring laser, Optics Communications, 164, 1-3, pp. 107-120, (1999)
[5]  
Wang L., Huang Z., Optical chaos communication with a dynamical SOA-based fiber ring laser, APOC 2003: Asia-Pacific Optical and Wireless Communications: Optical Transmission, Switching and Subsystems, pp. 619-627, (2003)
[6]  
Wang L., Wu W., Fang N., Et al., Experimental study on chaotic optical communication with PolSK modulation technology, APOC 2005: Asia-Pacific Optical and Wireless Communications: Optical Transmission, Switching and Subsystems, (2005)
[7]  
Yang X., A study on polarization-shift keying technology and optic chaos communication system, Dissertation of the Master's Degree, (2005)
[8]  
Li G., Zhou S., Xu D., Computing the largest Lyapunov exponent from time series, Journal of Applied Sciences, 21, 2, pp. 127-131, (2003)
[9]  
Lin J., Wang Y., Huang Z., Et al., A new voice activity detection method based on chaos theory, Journal of China Institute of Communications, 22, 2, pp. 123-128, (2001)
[10]  
Li Y., Xu D., State space reconstruction of nonlinear dynamic system, Ship Engineering, 22, 5, pp. 47-50, (2000)
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