I'm working on acceleration signals coming from an accelerometer that has a sensitivity change of 0% from 2 Hz to 10000 Hz. When I perform the FFT of one this accelerometric signals I often obtain strong low frequency contents close to 0.1 Hz. I would like to cut away all the frequencies before 2 Hz because I don't think they are correct. The code I used is:
title('Single-Sided Amplitude Spectrum of xa(t) filtered and realigned Signal')
I was wondering if this type of filter may be adequate.
Thank you very much,