Estimating parameters of chaotic systems synchronized by external driving signal

作者：Wu Xiaogang^*; Wang Zuxi

来源：Chaos Solitons & Fractals, 2007, 33(2): 588-594.

DOI：10.1016/j.chaos.2006.01.051

Noise-induced synchronization (NIS) has evoked great research interests recently. Two uncoupled identical chaotic systems can achieve complete synchronization (CS) by feeding a common noise with appropriate intensity. Actually, NIS belongs to the category of external feedback control (EFC). The significance of applying EFC in secure communication lies in fact that the trajectory of chaotic systems is disturbed so strongly by external driving signal that phase space reconstruction attack fails. In this paper, however, we propose an approach that can accurately estimate the parameters of the chaotic systems synchronized by external driving signal through chaotic transmitted signal, driving signal and their derivatives. Numerical simulation indicates that this approach can estimate system parameters and external coupling strength under two driving modes in a very rapid manner, which implies that EFC is not superior to other methods in secure communication.

• 出版日期2007-7
• 单位华中科技大学