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Fourier transform of a real signal

  1. Apr 11, 2009 #1
    Taking a Fourier-transform of a real signal, gives me a spectrum that has symmetry.

    If I take the FFT of a real signal, then throw away half of the spectrum, and then do an inverse transform I get a complex-signal.

    I go from r(t) to rc(t) where rc(t) is a complex-signal.

    Now this complex-signal supposedly contains all the information to reconstruct the original real-signal. My question is, how?
    Last edited: Apr 12, 2009
  2. jcsd
  3. Apr 11, 2009 #2
    Last edited by a moderator: Apr 24, 2017
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