Bahraminasab, Alireza and Ghasemi, Fatemeh and Stefanovska, Aneta and McClintock, Peter V. E. and Kantz, Holger (2008) Direction of coupling from phases of interacting oscillators: A permutation information approach. Physical review letters, 100 (8). 084101. ISSN 1079-7114
Full text not available from this repository.Abstract
We introduce a directionality index for a time series based on a comparison of neighboring values. It can distinguish unidirectional from bidirectional coupling, as well as reveal and quantify asymmetry in bidirectional coupling. It is tested on a numerical model of coupled van der Pol oscillators, and applied to cardiorespiratory data from healthy subjects. There is no need for preprocessing and fine-tuning the parameters, which makes the method very simple, computationally fast and robust.