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AuthorAssous S.
AuthorBoashash B.
Available date2022-05-31T19:01:37Z
Publication Date2012
Publication NameEurasip Journal on Advances in Signal Processing
AbstractThis article considers the problem of phase synchrony and coherence analysis using a modified version of the S-transform, referred to here as the Modified S-transform (MST). This is a novel and important time-frequency approach to study the phase coupling between two or more different spatially recorded entities with nonstationary characteristics. The basic method includes a cross-spectral analysis to study the phase synchrony of nonstationary signals, and relies on some properties of the MST, such as phase preservation. We demonstrate the usefulness of the technique using simulated examples and real newborn EEG data. The results show the advantage of using the cross-MST in the study of the connectivity between different signals using the time-frequency coherence. The MST led to improvements in resolution of almost twofold over the standard S-Transform in the examples presented in the article.
SubjectEEG signals
SubjectInstantaneous frequency
SubjectPhase synchrony
SubjectQuadratic time-frequency
SubjectS transforms
SubjectTime frequency
SubjectTime-frequency signal analysis
SubjectArray processing
SubjectElectrical engineering
SubjectSpectrum analysis
TitleEvaluation of the modified S-transform for timefrequency synchrony analysis and source localisation
Issue Number1
Volume Number2012

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