Recent content by lmartinez

From a digital electroencephalograph. It's was an analog signal converted to digital. How long do you need it? I can send you one.

Yes, I'm beginning with Matlab, I was looking for in the Filter Design Toolbox and FFT help... I'll search this handel and chirp. If I need more help I'll write you :redface: Liz

EEG FFT and filter with Matlab Thank you, I've been searching this for days :smile: :approve:

Ok, I got it, in my test I wasn't modifying it in both sides, thank you. This last question please: maybe the principal error was that I didn't know digital filters are applied in time domain... I was trying to use a filter designed with fdatool. So, can I apply this imported filter directly...

Processing digital signal with Matlab (FFT and filter) Thank you Warren, I undestand this, but I mean, is it not supposed to get a real vector back if I use Fourier antitransform ifft? If I try to apply fft to a vector, I get a complex one -until here it's ok- then with ifft, I'm...

I have a digital signal from EEG recording. I need to filter 50 Hz frequencies and 0.5 to 120 Hz, so I've tried this: 1. I designed a notch filter with Matlab. 2. I used fft to transform the signal to frecuency domain. 3. I applied the notch filter. 4. I used ifft to get back to time domain...