if i'm using Sampling frequency less than Nyquist Sampling frequency, Aliasing will occur which will scramble the whole signal, so one solution is to use anti-aliasing filter
How can i calculate it's Bandwidth, also is it a band-pass filter ?
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
Aliasing occurs if there are signals present that are greater than half the frequency of the sampling frequency. Lower picture shows aliasing. Upper picture is OK: -
Using a filter to eradicate those frequencies is impossible because you would need a brick wall filter so you have to decide on how much attenuation you have to provide in the filter to give an acceptably low level of aliasing.
It's a low pass filter that reduces aliasing.
So decide on the attenuation required for any aliased signals and design a filter based on (typically) multiple sections of Sallen Key filters together forming (typically) a butterworth (maximally flat) low pass filter.