Time–frequency representations-based detector of chaos in oscillatory circuits

Detection of chaotic states in the nonlinear chaotic Chua's oscillatory circuit has been considered. A new approach, based on the concentration measure of the time–frequency (TF) representation, is proposed for determination of the current circuit state. Parameters of the proposed algorithm are studied in details. The algorithm is applied in the case of moderate noisy signal, as well as for breaking a chaotic communication scheme.