DFT
- noun
- Specialized
:
transformada discreta de Fourier
- The researchers used a DFT to analyze the frequency components of the signal.
Examples
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The spectrum still contains the same information, but when the inverse transform is applied—now with a 16-point DFT—this produces the same contour shape but with 16 data points, as can be seen to the left.
Academic text (2011) -
This is getting to know your DfT, your discrete Fourier transform.
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This is actually one of the main reasons for using this DFT method:
Academic text (2011) -
Here, it is the DFT length that is adapted to the number of measurement points of the contour.
Academic text (2011) -
For example, a 50-point contour was calculated using a custom 50-point DFT to yield a 50-point spectrum.
Academic text (2011) -
In the DFT calculation, the spectral amplitudes were normalized against the number of data points. This allowed the spectral amplitudes to be compared proportionally.
Academic text (2011) -
By applying a DFT, we can transform the time-domain data into the frequency domain.
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The algorithm implemented a fast DFT, allowing for quicker analysis of large data sets.
Surface Forms
Etymology
DFT here stands for discrete Fourier transform, where discrete means 'separate pieces' and transform means 'change'. It is a way to 'change' a sequence of numbers into the different frequencies inside it, which is why engineers use it to find the main tones in a signal.
