m,anish 2nd cide

clear all

wc = 0.5*pi;

N=25;

alpha = (N-1)/2

eps=0.001;

n=0:1:N-1;

hd=sin(wc*(n-alpha+eps))-sin(wc*(n-alpha+eps))./(pi*(n-alpha+eps));

wr=boxcar(N);

hn=hd.*wr’;

w=0:0.01:pi;

h=freqz(hn,1,w);

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

hold on

wb= blackman(N);

hn=hd.*wb’;

h=freqz(hn,1,w);

plot(w/pi,abs(h),’-.’);grid;

xlabel(‘Normalized Frequency\omega\pi’);

ylabel(‘Magnitud’);

hold off