FiltFilt function to filter a 50Hz signal

Dear all,

I have a doubt regarding the use of the filtfilt function. It's possible to apply this function to filter the noises in a DC signal acquired at 50Hz or it's necessary to use another or personal function?

Thanks

Fabio

Answer 1

[Star Strider]

First, you have to design the ‘bandstop’ (or ‘notch’) filter to eliminate the 50 Hz noise. Then use filtfilt to filter the signal.

One example of such a filter specification is Bandstop Butterworth Filter. (My filter design procedure is here.)