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I am trying to sample the magnitudes of a shifted window in the frequency domain. I seem to be doing it wrong when a part of the window sits in the negative frequency. Does anyone know the correct way of reflecting negative frequency to the positive side?
Here is an example: if the window (a...
OK! My approach was indeed wrong :) I found out that I need to zero-pad the time domain signal to the desired length L. and then use an FFT of length L.
Thanks for the help!
Hi FvM,
thanks for your prompt reply.
This is my windowing function:
function blackman(N)
# Default alpha = 0.16
a0 = 0.42659;
a1 = 0.49656;
a2 = 0.076849;
w = zeros(N);
for n = 1:N
w[n] = a0 - a1 * cos(2*pi*n/(N-1)) + a2 * cos(4*pi*n/(N-1));
end
return w;
end
I assume...
Hello Forum,
given a N-point window h(n), how do I create an oversampled Fourier transform H out of h(n)? I need to have very high resolution of the H so that I can find out the magnitude of arbitrary frequency with little frequency error.
This is what I did: to oversample h(n) with factor 2...
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