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Math Help - Autocorrelation of frequency-domain functions

  1. #1
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    Autocorrelation of frequency-domain functions

    Hi,

    is a signal, and is signal-independent random noise.

    I am reading a proof on Wikipedia (link), which says:

    Quote Originally Posted by Wikipedia
    [...]we are assuming that the noise is independent of the signal, therefore:

    What is the equivalent statement of this in terms of and ?

    Thanks.
    Last edited by algorithm; May 8th 2011 at 05:15 PM.
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