I work with a Electrophysiologist Team and i have seen something who interrogate me (i'm a noobs in DSP).
They acquires a signal into a brain structure (an LFP to be precise) :
in a first time they apply a zscore(standard score) normalization on the raw data
then they computes a spectral estimation with a CWT(continuous wavelet transform, morlet in this case)
Is that not a bias to use a normalization like a zscore before estimate the spectrum(or to do anything else in DSP)? Or is that a common way to deal?
Thank you for a potential answer.