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ok i am assuming that you are totally new to dsp and as such those two answers that you have already received probably mean nothing to you. Anyway the only relation that there is between autocorrelation and the fourier transfrom is actually the similarity between the DFT (discrete fourier transform) and auto correlation i.e. if you are learning DSP in your book it will give you a hand method of calculating the DFT, cross correlation (between two signals) and the autocorrelation. the calculation of these three items by hand is quite similar (and no i won't get into the technical details for now). the only relation between autocorrelation and psd is the fact that if you take a signal and get the autocorrelation of that signal, then if you apply the fourier transform to the result you will get the psd.
hope this helps,
sincere regards,
t
I asked the same question a while ago, but everyone kept giving me mathematical equations, can't anybody give us a paper that describes this physically?:idea:
I dont know the exact paper which describe the mathematical equation physically, but I am attaching a paper which gives you the usage of above mathematical equation in audio/speech codec applications.
I think this paper helps you to understand it physcially.
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