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