Abstract In this paper we propose and investigate the synchronization of a new chaotic model with time-varying parameters and apply it to improve the security of chaotic communication. In this model, the chaotic system is modulated by both the message and the varying parameters. The varying parameters distort the phase space so heavily that they prevent the carrier from being broken by nonlinear dynamic forecasting method. Theory and simulation experiments with speech signal communication indicate that the receiver can gain a perfect synchronization with the transmitter, and the intruder cannot break down this communication system. We also discuss the robustness of the new communication system.
Received: 01 July 2002
Revised: 03 January 2003
Accepted manuscript online:
(Telecommunications: signal transmission and processing; communication satellites)
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 10074035 and 19834040).
Cite this article:
Mu Jing (牟静), Tao Chao (陶超), Du Gong-Huan (杜功焕) Synchronization of the time-varying parameter chaotic system and its application to secure communication 2003 Chinese Physics 12 381
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