The first transform that was practically implemented on the kit was DFT. The input sequence was converted into a sequence using DFT algorithm. Mathematical manipulations is much easier in DFT. However, the number of calculations required are in exponential forms and hence, DFT requires a large amount of computations.
A good overview of DFT algorithm.
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DeleteNice.
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DeleteConcise and good!
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DeleteNicely written
ReplyDeleteVery precise
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DeleteSince the calculations are more, DFT algorithms are slower than FFT
ReplyDeleteYes, and hence FFT is preferred over DFT.
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ReplyDeleteHas this is a major disadvantage and hence, FFT is preferred.
DeleteDFT is sampling of DTFT spectrum
ReplyDeleteThis overcomes the disadvantage of DTFT systems.
DeleteN^2 complex multiplication required
ReplyDeleteWhich are way higher than FFT
DeleteResults of DFT can be stored in memory.
ReplyDeleteSince their values are discrete
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