I am new with detrending techniques, I have a carrier phase measurements and I want to detrend it by 6th order butterworth digital filter. After creating the digital filter I get its numerator (
b) and denominator (
a). The filter was created by
scipy.signal.butter(N, Wn, btype='highpass', analog=False, output='ba')
In this case, do I need only to multiply the carrier phase measurements by the output of the filter which is
b/a or I need to multiply it by something else?