i have measurement data that i want to filter using a lowpass, bandpass, etc.
To filter it i first wanted to get the frequency of the signal so that i can design my filter properly. Unfortunately there is no peak at a certain frequency as i am used to with other sensors so i am not sure how to filter it. Also i am really surprised by the small frequencys of 0.0X Hz. Is there maybe a mistake in my code? How would you filter this signal?
I also attached the measurement data.
Thank you very much.
CH0FT = fft(CH0-mean(CH0),,1)/L;
Fv = linspace(0, 1, fix(L/2)+1)*Fn;