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The matched phase reassignment, developed to estimate phase synchrony of transient oscillatory signals, is extended into a multitaper phase reassignment (MTPR) method. The method gives perfect time-frequency localization for two transients with zero phase difference and estimates of time locations and oscillatory frequencies in low signal-to-noise ratios. For different signal-to-noise ratios between channels a suggestion of corrected reassignment vector expressions is given, resulting in minimized variance. The MTPR outperforms the matched phase reassignment as well as state-of-the-art methods, such as Pearson's linear correlation, time-frequency cross-spectrogram phase estimation and the Phase Lag Index method. An example of estimated phase differences, time locations and oscillatory frequencies of electrical signals measured from the brain is also shown.
|Title of host publication||29th European Signal Processing Conference, EUSIPCO 2021 - Proceedings|
|Publisher||European Signal Processing Conference, EUSIPCO|
|Number of pages||5|
|Publication status||Published - 2021|
|Event||29th European Signal Processing Conference, EUSIPCO 2021 - Dublin, Ireland|
Duration: 2021 Aug 23 → 2021 Aug 27
|Name||European Signal Processing Conference|
|Conference||29th European Signal Processing Conference, EUSIPCO 2021|
|Period||2021/08/23 → 2021/08/27|
Bibliographical noteFunding Information:
This work was supported by the Wallenberg Autonomous Systems and Software Program (WASP) funded by Knut and Alice Wallenberg Foundation.
© 2021 European Signal Processing Conference. All rights reserved.
Subject classification (UKÄ)
- Control Engineering
- Oscillatory transient signals
- Phase synchronization
- Time-frequency reassignment
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