Chaos synchronization based on observer and its application in speech secure communication

Author

Tang, Liangrui ; Zhao, Lin ; Yang, Xue

Author_Institution

Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Beijing, China

fYear

2010

fDate

24-26 Sept. 2010

Firstpage

773

Lastpage

777

Abstract

The synchronization of a four-dimensional hyperchaotic system is analyzed. Two state observers are designed with different methods to realize rapid synchronization of the response and drive systems respectively. When the system parameters are known, we analyze the design processes of two observers and verify their effectiveness. Analysis shows that the synchronization schemes are simple and effective and they do not need to construct Lyapunov functions. Furthermore, they have certain universality. Finally, the synchronization systems are applied to voice secure communications. The encryption and restoration of the speech signal are simulated through experiments. Theoretical analysis and simulation results show the feasibility and effectiveness of the scheme.

Keywords

chaotic communication; cryptography; signal restoration; speech processing; synchronisation; telecommunication security; voice communication; 4D hyperchaotic system; chaos synchronization; encryption; speech secure communication; speech signal restoration; synchronization system; system parameter; two state observer; voice secure communication; Chaotic communication; Lyapunov method; Observers; Simulation; Speech; Synchronization; hyperchaotic; observer; synchronization; voice secure communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Network Infrastructure and Digital Content, 2010 2nd IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-6851-5

Type

conf

DOI

10.1109/ICNIDC.2010.5657885

Filename

5657885