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FFT time shift using Matlab

  1. Feb 6, 2008 #1

    How can I time shift (ts) a real signal (N samples, T time period, dt
    sample rate, Fs sampling frequency) using matlab:

    Timeshift signal = ifft (fft(signal)*exp(2*i*pi*Fs*ts)) ???
    I am trying to do it this way and it is not working?

    For example how would you shift a Cos signal to fit on a Sin signal ( Phase shift of pi/2 or time shift of ts)

  2. jcsd
  3. Feb 10, 2008 #2
    the 'sin' 'cos' was only an example, I am talking about general case.
    I need to know how to do it with FFT, i know that it has something to do with the symmetry of the transformation, i just do not know how to do it.

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