Reconstruct time series from FFT components. There is a time shift error.
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Haifei Chen
le 24 Juin 2024 à 18:38
Commenté : Haifei Chen
le 25 Juin 2024 à 4:38
Hello,
I'd like to extract various frequency components (amplitue, frequecny, phase) by applying FFT to a time series. Then to check if I get the correct numbers, reconstruct the time series by summing up the cosine components. As shown in the figure attached, there seems to be a growing time shift. What went wrong in my script? This issue is absent for my another set of data though.
Thank you!
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