Tuesday, October 22, 2019

fourier transform - Extracting frequencies from FFT


I performed 512 point FFT on a signal. I got another set of 512 Numbers. I understand that those numbers represent amplitude of the various sine and cosine waves having different frequencies.



If my understanding is correct can somebody tell me how to know the frequencies of those sine and cosine waves from the knowledge of those 512-numbers (i.e amplitudes) ?




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