Group delay of moving average filter

1. What is the group delay of a filter?
2. How do you calculate group delay of a filter?
3. Which filter should one use to get a constant group delay?
4. What is phase delay and group delay in filters?

What is the group delay of a filter?

Group delay in a filter is the time delay of the signal through the device under test as a function of frequency. If we take the example of a modulated sine wave, for example an AM radio signal. Group delay is a measurement of the time taken by the modulated signal to get through the system.

How do you calculate group delay of a filter?

M(ω)•e^jΦ(ω) = H(ω) = the DTFT of h(n) –d[Φ(ω)]/dω = group delay of the filter.

Which filter should one use to get a constant group delay?

By far the most common applications for FIR filters are linear phase FIR filters because of the benefit of constant group delay which is the result of linear phase.

What is phase delay and group delay in filters?

one last important difference: the phase delay at some frequency f is the time delay of the phase of the quasi-sinusoidal signal of frequency f passed through the filter. the group delay is the time delay of the envelope or "group" of the quasi-sinusoid.