Direction of Coupling from Phases of Interacting Oscillators: A Permutation Information Approach
- 26 February 2008
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 100 (8), 084101
- https://doi.org/10.1103/physrevlett.100.084101
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.This publication has 23 references indexed in Scilit:
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