DFT Cheat Sheet

Since I have so much to do with the dis­crete Fouri­er trans­form (DFT) – both recent­ly and not so recent­ly – I always want­ed to make a sort of “cheat sheet” about it with the most impor­tant rela­tions of the var­i­ous time and fre­quen­cy dimen­sions and some of the more impor­tant trans­form pairs all on one page. Final­ly got around to do this (and I had to sac­ri­fice quite a bit of Drag­on Age time for this). I wish I had had this four or five years ago – I can­not fath­om how much time this would have saved me that I spent on think­ing about var­i­ous aspects of the DFT…

I’m hop­ing this might be use­ful for oth­er folks out there as well (espe­cial­ly the MATLAB wiz­ards), so I’m mak­ing it avail­able for down­load. If you think there’s some­thing wrong or miss­ing, let me know in the com­ments and I’ll try to fix it.


Down­load the DFT Cheat Sheet.


If I find the time and moti­va­tion, I’m plan­ning on doing some­thing sim­i­lar for the reg­u­lar Fouri­er trans­form (prob­a­bly with­out the images) and for some of the more impor­tant trigono­met­ric iden­ti­ties, since I find myself look­ing this stuff up in Wikipedia all. the. time.

last posts in signal processing:


  • What did you actu­al­ly use to cre­ate the graph­ics?

  • Yaisog Bonegnasher wrote:

    Most­ly Math­e­mat­i­ca, with a lit­tle pol­ish­ing in a vec­tor draw­ing soft­ware. The math is set using MathType (I would have used LaTeX, but I was too lazy).

  • Stefan wrote:

    Also ne, jet­zt also auch noch Spickzettel. Bis zur ECOC

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