MATLAB CODE TO DESIGN A FIR LOW PASS FITTER USING HAMMING & BLACKMAN WINDOW

CODE:

clear all;

wc=0.5*pi; % cutoff freq.

N=25;

b=fir1(N,wc/pi,hamming(N+1));

w=0:.01:pi;

h=freqz(b,1,w);

plot(w/pi,abs(h));

hold on

b=fir1(N,wc/pi,blackman(N+1));

w=0:.01:pi;

h=freqz(b,1,w);

plot(w/pi,abs(h),'-');grid;

xlabel('Normalised frequency \omega/\pi');

ylabel('Magnitude');

hold off

OUTPUT: