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	Breaking a chaotic direct sequence spreading spectrum secure communication system
	Hu Jin-Feng ; Guo Jing-Bo
	2010-05-10 ; 2010-05-10
关键词	chaotic secure communication system breaking chaos fitting unscented Kalman filter GENERALIZED SYNCHRONIZATION SIGNALS MODULATION SEPARATION SCHEME Physics, Multidisciplinary
中文摘要	In this paper, a novel method is proposed for the breaking of chaotic direct sequence spread spectrum (CD3S) secure communication system. Chaotic fitting is defined based on the concept of generalized synchronization, then the method based on unscented Kalman filter and chaotic fitting is presented based on the principle of CD3S and the characteristic that the information symbol varies slowly. Furthermore, addressing to the tracking error induced by the processing noise and chaotic fitting error, a modified unscented Kalman filter based on tracking-error-controlled factor is suggested. The CD3S is unmasked according to the error-amplitude of the tracking-error. We can extract the binary message signal from the CD3S signal without knowing either the structure or the parameters of the chaotic transmitter. Simulation results verify the method.
语种	中文 ; 中文
出版者	CHINESE PHYSICAL SOC ; BEIJING ; P O BOX 603, BEIJING 100080, PEOPLES R CHINA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/21979]
专题	清华大学
推荐引用方式 GB/T 7714	Hu Jin-Feng,Guo Jing-Bo. Breaking a chaotic direct sequence spreading spectrum secure communication system[J],2010, 2010.
APA	Hu Jin-Feng,&Guo Jing-Bo.(2010).Breaking a chaotic direct sequence spreading spectrum secure communication system..
MLA	Hu Jin-Feng,et al."Breaking a chaotic direct sequence spreading spectrum secure communication system".(2010).

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