Komeil Nosrati - Ferdowsi University of Mashhad,
Ali Shokouhi Rostami - Ferdowsi University of Mashhad
Naser Pariz - Ferdowsi University of Mashhad
Asad Azemi - Penn State University of USA

In this paper we numerically investigate the chaotic behaviours of the fractional-order Lorenz system and its synchronization. For the first time, a fractional chaotic synchronization using an Unscented Kalman Filter (UKF) is presented. The chaotic synchronization is implemented by the UKF design in the presence of process noise and measurementnoise. To illustrate the effectiveness of the synchronization with the UKF method, a numerical example based on the fractionalorder Lorenz dynamical system is presented and the results are compared to the Extended Kalman Filter (EKF) method

Fractional-order system, Chaos synchronization, Unscented Kalman Filter, Lorenz