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How can I calculate 8 point DFT of signals whose length is less then 8 ( say 2,4) then what will I assume other members in formulae "0" or rotation or keep repeating the same two numbers

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Consider I want to find 4 point DFT of [1,2]

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  • $\begingroup$ The DTFT is a formula, a series of exponentials. $\endgroup$ – user28715 Jun 28 '19 at 15:48
  • $\begingroup$ @Stanley Pawlukiewicz Yes it is a formula but if I calculate 8 point DTFT between two signals whose length is less then 8 say 2 then what will I assume other members in formulae 0 or rotation or keep repeating the same two numbers $\endgroup$ – Buzz bee Jun 28 '19 at 16:02
  • $\begingroup$ I don't think you are looking at the correct formula. N points have N terms $\endgroup$ – user28715 Jun 28 '19 at 16:05
  • $\begingroup$ @Stanley Pawlukiewicz plz see edits $\endgroup$ – Buzz bee Jun 28 '19 at 16:27
  • $\begingroup$ see en.m.wikipedia.org/wiki/Discrete-time_Fourier_transform one does not repeat or rotate the DTFT $\endgroup$ – user28715 Jun 28 '19 at 16:31

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