## Frequency response of window functions for FIR Filter

This Program is used to find and plot the Frequency response of

(1) Hanning window (2)Hamming window for M = 11

```
//Program to find and plot the frequency response of
//(1) Hanning window (2)Hamming window for M = 11
clear all;
close;
clc
M = 11;
for n = 1:M
h_hann_11(n) = 0.5-0.5*cos(2*%pi*(n-1)/(M-1));
h_hamm_11(n) = 0.54-0.46*cos(2*%pi*(n-1)/(M-1));
end
subplot(2,1,1)
[h_hann_11_M,fr]=frmag(h_hann_11,512);
h_hann_11_M = 20*log10(h_hann_11_M./max(h_hann_11_M));
plot2d(fr,h_hann_11_M,2);
title('Frequency Response 0f Hanning window Filter length M =11')
subplot(2,1,2)
[h_hamm_11_M,fr]=frmag(h_hamm_11,512);
h_hamm_11_M = 20*log10(h_hamm_11_M./max(h_hamm_11_M));
plot2d(fr,h_hamm_11_M,2);
title('Frequency Response of Hamming window Filter length M =11')
```