International Journal of applied mathematics and computer science

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Paper details

Number 1 - March 2019
Volume 29 - 2019

Synchronization of fractional-order discrete-time chaotic systems by an exact delayed state reconstructor: Application to secure communication

Said Djennoune, Maamar Bettayeb, Ubaid Muhsen Al-Saggaf

This paper deals with the synchronization of fractional-order chaotic discrete-time systems. First, some new concepts regarding the output-memory observability of non-linear fractional-order discrete-time systems are developed. A rank criterion for output-memory observability is derived. Second, a dead-beat observer which recovers exactly the true state system from the knowledge of a finite number of delayed inputs and delayed outputs is proposed. The case of the presence of an unknown input is also studied. Third, secure data communication based on a generalized fractional-order Hénon map is proposed. Numerical simulations and application to secure speech communication are presented to show the efficiency of the proposed approach.

fractional-order discrete time systems, chaotic map, chaotic synchronization, dead-beat observer, secure data communication