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DFT - zero padding avoids aliasing?

  1. Dec 27, 2006 #1
    hey guys - i can't seem to find find this statement anywhere - but it makes sense to me - could someone please verify.
    When you find the DFT of a signal say: x[0]=2, x[1]=4, x[2]=6, x[3]=8 - you will get four discrete points in frequency (per period) now if you zero pad the time signal such that you get x[0]=2, x[1]=4, x[2]=6, x[3]=8 x[4]=0, x[5]=0, x[6]=0, x[7]=0 - you will once agin get four discrete frequency points but now the gap between each period will be larger (thus decreasing any chances of aliasing)


    thnks
     
  2. jcsd
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