MATLAB: High pass filter with cutoff set at 0.003Hz

Question

Hi,

I have a data set consisting of a mean bloodpressure and I want to high-pass-filter this signal with a DC cutoff set at 0.003 Hz. I'm not really familiar with signal processing (filter type, freq domain etc) so if anyone could help me out a bit, that would be great.

thanks in advance,

Paul

Answer 1

My filter design procedure is here: How to design a lowpass filter for ocean wave data in Matlab?

Before you design a filter with such a low stopband, consider your sampling frequency. If you have a ‘high enough’ sampling frequency, consider a Chebyshev Type II filter.