Measuring Phase Synchronization of Superimposed Signals

Frank C. Meinecke, Andreas Ziehe, Jürgen Kurths, and Klaus-Robert Müller

Phys. Rev. Lett. 94, 084102 – Published 3 March 2005

Abstract

Phase synchronization is an important phenomenon that occurs in a wide variety of complex oscillatory processes. Measuring phase synchronization can therefore help to gain fundamental insight into nature. In this Letter we point out that synchronization analysis techniques can detect spurious synchronization, if they are fed with a superposition of signals such as in electroencephalography or magnetoencephalography data. We show how techniques from blind source separation can help to nevertheless measure the true synchronization and avoid such pitfalls.

Received 7 September 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.084102

Authors & Affiliations

Frank C. Meinecke^1,*, Andreas Ziehe^1,†, Jürgen Kurths³, and Klaus-Robert Müller^1,2,‡

¹Fraunhofer FIRST.IDA, Kekuléstrasse 7, D-12489 Berlin, Germany
²Institut für Informatik, Universität Potsdam, August-Bebel Straße 89, D-14482 Potsdam, Germany
³Institut für Physik, Universität Potsdam, Am Neuen Palais, PF 601553, D-14415 Potsdam, Germany

^*Electronic address: meinecke@first.fhg.de
^†Electronic address: ziehe@first.fhg.de
^‡Electronic address: klaus@first.fhg.de

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Issue

Vol. 94, Iss. 8 — 4 March 2005

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