FIR Filter Design using window Method

In FIR filter, poles are always located at origin. For causal & stable filter all the poles must lie inside a unit circle therefore FIR filter is always stable. FIR filter can have a linear phase response only when h(n) is symmetric & anti-symmetric.

For this particular experiment we used window method for designing purpose. In this method, the output h(n) is calculated by multiplying hd(n) with particular window function which can be chosen depending upon As value.

We designed LPF & BPF for specified As,Ap,Fp,Fs & Fsamp values. After doing calculations on values derived from magnitude response we obtained As & Ap values. (calculated).

The phase response linearly varies with frequency.