Hi,
Thank you for your reply. Ok, I guess that makes sense. In our book though, we technicaly haven't gotten to FFT so that probably why I haven't seen that yet.
Your response gave me an idea, given the periodicity of e±j2πnk/N , instead of choosing k=1 and k=-1, I could just as easily...
Hello,
This is a more general question than anything, but I am curious how to compute the DFT of a cosine wave.
Somebody tried to explain this to me as follows:
start by trying to find an x(k) who's IDFT equals cos(2*pi*n/N).
x(k) = (N/2) * (dirac-delat(k+1) _ dirac-delta(k-1)) only has values...