Journal
OPTIK
Volume 125, Issue 20, Pages 5920-5925Publisher
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2014.08.001
Keywords
Four-wing chaotic system; Secure communication; High-order sliding mode adaptative controller; Parameter modulation; Disturbance inputs
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In this paper, a two-input two-output secure communication scheme based on a four-wing four-dimensional chaotic system with disturbance inputs is discussed. Based on parameter modulation theory and Lyapunov stability theory, synchronization and secure communication between transmitter and receiver are achieved and two message signals are recovered via a convenient robust high-order sliding mode adaptative controller. In addition, the gains of the receiver system can be adjusted continually, the unknown parameters can be identified precisely and the disturbance inputs can be suppressed simultaneously by the proposed adaptative controller. Synchronization under the effect of noise is also considered. Computer simulations are done to verify the proposed methods and the numerical results show that the obtained theoretic results are feasible and efficient. (C) 2014 Elsevier GmbH. All rights reserved.
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