If you are given an inverse DFT, then how do you convert it back to the DFT without actually computing any DFT?

  • $\begingroup$ en.wikipedia.org/wiki/… plus a bit of basic math does the trick. $\endgroup$ – Marcus Müller Mar 7 '20 at 9:47
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    $\begingroup$ Your question seems ambiguous to me. When you say "an inverse DFT" are you referring to a finite sequence of numbers or a mathematical equation? And this "DFT" thing you desire, is it a finite sequence of numbers or a mathematical equation? $\endgroup$ – Richard Lyons Mar 7 '20 at 10:53
  • $\begingroup$ I wonder, is the material at the following web site the information you seek: dsprelated.com/showarticle/800.php $\endgroup$ – Richard Lyons Mar 7 '20 at 11:21
  • $\begingroup$ @RichardLyons i am referring to the sequence of numbers or signals.... This was one of my query I read in the exercise section of the book $\endgroup$ – Electronics Engineer Mar 8 '20 at 13:16
  • $\begingroup$ @ElectronicsEngineer. Hi. So your question seems to be: "If you are given a time-domain sequence (an inverse DFT), then how do you compute its DFT (convert it back to the DFT) without actually computing any DFT?" Is that a correct description of your question? $\endgroup$ – Richard Lyons Mar 10 '20 at 17:46

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