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thomas49th
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Homework Statement
The Fourier transform of the auto correlation function is the energy spectral density (ESD) of a signal. Here is the "apparent" proof:
[tex]\int e^{-jwT} [ \int g(t)g(t+T)dt] dT[/tex]
=> [tex]\int g(t)[ \int g(T+t)e^{-jwT}dT] dt[/tex]
What happened here? Why did the second integral change from t to T, why did t+T turn to T+t and the exponent change from jwt to jwT?
Thanks
Thomas
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