how does a phase-locked loop work?

December 01, 2021

tracking phase with a phase-locked loop: phase of a signal is compared to a reference oscillation. depending on the low-pass filtered phase difference, the reference frequency is adjusted. filter properties determine whether phase can be tracked after sudden frequency jumps. pic.twitter.com/uAqjgTmyQZ
— Natalie Schaworonkow (@nschawor) November 30, 2021

waveshape and SNR

January 23, 2021

many measures depend on sufficient SNR. here, non-sinusoidal waveform shape is analyzed via the phase difference between an oscillation and its harmonic oscillation. for mu-rhythm bursts with high SNR, there is a fixed phase shift resulting in arc shape, but not for low SNR. pic.twitter.com/VA0ac2CJ1S
— Natalie Schaworonkow (@nschawor) January 23, 2021

validity of phase measures, second take

December 11, 2020

after some discussions, maybe a simpler way to look at this: numerical values for phase throughout the whole interval, but bursts with clear troughs and peaks only at certain times in the below signal. pic.twitter.com/4kLAiADpEH
— Natalie Schaworonkow (@nschawor) December 11, 2020

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waveshape and SNR

validity of phase measures, second take