Nonlinear observer performance in chaotic synchronization with application to secure communication

Javid Amirazodi, Edwin E. Yaz, Asad Azemi, Yvonne I. Yaz

Research output: Contribution to conferencePaperpeer-review

16 Scopus citations

Abstract

This work is on performance comparison of five different nonlinear observers in two chaotic synchronization case studies and their application to secure communications. Extended Kalman filter, state dependent Riccati equation, Thau's observer, high-gain observer, and covariance upper bound assignment techniques are used in state reconstruction of two chaotic nonlinear systems, namely Chua and Lorenz systems. We show that synchronization of chaotic systems can be effectively achieved by using any of the above techniques. However they exhibit different performances. A comparative robustness study involving performance under different measurement noise levels is also included. The above methods are then applied to introduce a method of secure communications, by chaotic masking, where the message is injected into the chaotic signal generated by Chua's circuit in the transmitter where they are simultaneously transmitted over a noisy channel to the receiver. The proposed observers are then applied in the receiver and the performances are compared based on Monte-Carlo simulations in order to demonstrate the relative effectiveness of these techniques.

Original languageEnglish (US)
Pages76-81
Number of pages6
StatePublished - Jan 1 2002
EventProceedings of the 2002 IEEE International Conference on Control Applications - Glasgow, United Kingdom
Duration: Sep 18 2002Sep 20 2002

Other

OtherProceedings of the 2002 IEEE International Conference on Control Applications
CountryUnited Kingdom
CityGlasgow
Period9/18/029/20/02

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering

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