I would like to know which frequencies are hidden in my velocity signal (=velocity vector).
I started straight forward: I took the "fft" of the vector and plotted its amplitude against the frequencies, but this does not give me the desired result, i.e. no clear frequency peaks were observed.
Since the velocity vector is non-periodic, i tried to smoothen the beginning and end of the signal by means of a hanning window. Unfortunately, it did not work.
I attached all the data in the zip-file it contains:
- UpV_irreg.mat (velocity vector)
- t_irreg.mat (corresponding time vector)
- fft_test.m (my code)
Any help would be greatly appreciated.