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Numerical analysis of a digitized signal

2 votes
1 answer
185 views

Finding similarities using Wavelet transform

I have a time serie and I want to find similarities in it. For the first step I have calculated Haar-wavelet coefficients for this time serie, and now I don't know exactly how should I continue shoul …
3 votes
2 answers
3k views

Periodogram vs. spectral density diagram of a time series

Could someone explain to me the difference between a periodogram and spectral density diagram? The first diagram is produced with this block of code: FF = abs(fft(datalist)/sqrt(128))^2 f = (0:63) …
4 votes
3 answers
943 views

Separating different frequencies from time series

I have a time series, which is produced from a sensor. This sensor detect sound in the real World. My aim is to separate sounds with different frequencies from this time series. With which technique …