- #1
XcKyle93
- 37
- 0
Homework Statement
x[n] = Ʃ ck * δ(n-k), from k = -N to N. Plot the DTFT as a function of the number of terms N. This is a finite sum.
Homework Equations
The equation for the DTFT of a signal, which is Ʃ x[n] * e-j*2∏*∅*n, from n = -∞ to +∞
The Attempt at a Solution
I have nothing... something like
N = 50;
ck = 1;
X = [];
phi = 1/(2*pi);
for n = -1000:1:1000
sum = 0;
for k = -N:1:N
sum = sum + dirac(n-k);
end
X = [X sum*exp(-1i*2*phi*n)];
end
n = -1000:1:1000;
plot(n, X);
But this is obviously wrong. I don't know how to compute the DTFT for a signal of a finite length like that, much less plot it using MATLAB!