Frequency Response FIR Filter Bank

1. What is the frequency response of FIR filter?
2. What is frequency response of IIR filter?
3. How do you find the phase response of a FIR filter?
4. How to plot frequency response of FIR filter in Matlab?

What is the frequency response of FIR filter?

Since all signals can be decomposed into sinusoidal components, the frequency response function characterizes frequency regions called stop bands and pass bands, where the FIR filter will reject signal components or pass them nearly undistorted.

What is frequency response of IIR filter?

Infinite impulse response (IIR) filters are based on analog filters, where the frequency response is defined by both poles and zeros. Finite impulse response filters, in contrast, only have zeros. The presence of poles in the IIR filter causes the impulse response to be infinitely long.

How do you find the phase response of a FIR filter?

The formula is simple: given a FIR filter which has N taps, the delay is: (N – 1) / (2 * Fs), where Fs is the sampling frequency. So, for example, a 21 tap linear-phase FIR filter operating at a 1 kHz rate has delay: (21 – 1) / (2 * 1 kHz)=10 milliseconds.

How to plot frequency response of FIR filter in Matlab?

h = freqz(___, f , fs ) returns the frequency response vector h evaluated at the physical frequencies supplied in f . freqz(___) with no output arguments plots the frequency response of the filter.