Could anyone explain me please how to produce descrete fourier transform of such signal?enter image description here There are no anymore information besides the picture in this task.

  • $\begingroup$ These are values. The discrete Fourier Transform is a well-documented algorithm (Wikipedia, or literally thousands of results from your favourite search engine, every single textbook of the last 40 years on systems and signals…) that operates on vectors of values. So, what is your question, specifically? $\endgroup$ – Marcus Müller Mar 23 '19 at 13:21
  • $\begingroup$ My question is how to get fourier transform of that sequence, because I didnt understand how to do it. Thought that someone can explain it here a bit simply. $\endgroup$ – Hillbilly Joe Mar 23 '19 at 13:26
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    $\begingroup$ So, first off: sorry, we're not a "copy out an obvious source of information for me" service. So, we have to expect you to do your research and describe your problem with what you've read. So, really, have you tried understanding the Wikipedia article? What's been the problem with that? The question "explain everything about the DFT for me" is simply too broad, and underresearched, and will be closed here. $\endgroup$ – Marcus Müller Mar 23 '19 at 13:28
  • $\begingroup$ Okej, thanx for your explanation. I expected that someone explains in more details. Thought that here I can place a question on things I didnt understood. Thank you, you were the best explainer $\endgroup$ – Hillbilly Joe Mar 23 '19 at 13:32
  • $\begingroup$ You're still very welcome to read the source I linked to, and explain, in your question, what was unclear to you. It's about as easy as anyone of us would have written, so if you think we can knowledge magically appear in your head with lesser lecture or work on your side, I'm afraid I'll have to disappoint you. $\endgroup$ – Marcus Müller Mar 23 '19 at 13:36


  • Look at the ratio between two adjacent samples
  • Express the picture as a closed form time domain formula
  • Calculate the DFT using it's mathematical definition or just look it up in a table

It's not entirely clear whether the sequence is supposed to continue or is supposed to end at the right edge of the picture. You need to ask whoever posed this problem.


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