[Mne_analysis] Width of the transition band when applying a Hilbert transform
jeanne lusiot
jeanne.lusiot at gmail.com
Sat Jan 20 17:45:46 EST 2018
Hello,
My question relates more to a signal processing issue, so apologies in
advance if it is not appropriate for the forum.
I am currently doing an exploratory EEG power analysis using the
filter-Hilbert transform and would appreciate some advice on the
parameterization of the band-pass filter. For each epoch and time step, I
want to compute the power of each frequency from 1 to 30 Hz (in steps of
1).
I am thus bandpass filtering the data prior to the application of the
Hilbert transform (so I bandpass filter from 1 to 2Hz, then from 2 to 3hz
etc. ).
Mne's FIR filter implemented via mne.filter.filter_data is perfect for this
purpose, but I am wondering if I should use the default automatic width of
transition band, or whether i should set l_trans_bandwidth and
h_trans_bandwidth
to some fixed value x across all frequency bands. If so, how should I set x
to achieve a good balance between frequency/timing precision ?
Best,
J.
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