Recent content by JonMuchnick

  1. J

    Cooley-Tukey FFT: You don't have to zeropad to a power of 2?

    Anyone else here?
  2. J

    Cooley-Tukey FFT: You don't have to zeropad to a power of 2?

    @Bill Simpson: Are you sure that those are all Cooley-Tukey FFTs?
  3. J

    Cooley-Tukey FFT: You don't have to zeropad to a power of 2?

    Someone wrote "The algorithm that Cooley and Tukey presented in their classic paper (Math. Comp. 19 (1965), 297-301. http://dx.doi.org/10.1090/S0025-5718-1965-0178586-1) can be applied to any composite length. The performance advantages are greatest for highly composite lengths, of which...
  4. J

    What's the difference between convolution and crosscorrelation?

    I might indeed need to go a few steps back. But does understanding this thing help you to understand why people use a minussign in convolution and why people use convolution in signalprocessing, what the benefit of a flipped signal as a result of the minussign is?
  5. J

    What's the difference between convolution and crosscorrelation?

    " If you take the difference between the means and divide by the variance and take the convolution" How would you do that? Please give an example.
  6. J

    What's the difference between convolution and crosscorrelation?

    What's the difference between convolution and crosscorrelation? I read the answer below, but I don't know enough math to understand it. Could someone clarify it for me, please? "The meaning is quite different. To see why in a simple setting, consider X and Y independent integer valued...
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