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Re: filter raw EEG by frequency bands in time domain


From: Sergei Steshenko
Subject: Re: filter raw EEG by frequency bands in time domain
Date: Mon, 4 May 2020 02:10:02 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0


On 04/05/2020 1:43, Robert T. Short wrote:
Build a bank of bandpass linear-phase FIR filters


FFT is the ultimate FIR filter.

Again, with FFT, which is cheap on modern CPUs, the OP has unlimited freedom of experimentation. Creating a bandpass filter is trivial.


"The uniform bins don't play nice with EKG/EEG signals" - why/how ? Especially in the context of proposed FIR filters. Anyway, input signal can be trivially upsampled, and output signal can be trivially downsampled. Upsampling increases number of bins thus improving frequency resolution.

--Sergei.



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