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//Example 4_3
//Discrete Time Fourier Transform coefficient of Periodic Impulse Train
clc;
clear;
N=5;
N1=-3*N:3*N;
xn=[zeros(1,N-1),1];
x=[1 xn xn xn xn xn xn ];
ak=1/N;
XW=2*%pi*ak*ones(1,2*N);
Wo=2*%pi/N;
n=-N:N-1;
W=Wo*n;
figure
subplot(2,1,1)
plot2d3('gnn',N1,x,2);
xtitle('Periodic Impulse Train','n','x[n]')
subplot(2,1,2)
plot2d3('gnn',W,XW,2);
xtitle('DTFT of Periodic Impulse Train','w','jX(exp(jw))j')
disp(Wo)
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