離り散さんフーリエ変へん換かん

Meanings

1

noun

discrete Fourier transform; DFT

mathematics

Mathematical transform used to analyze discrete-time signals in the frequency domain.

interchange, period, change

高こう速そくフーリエ変へん換かん
Fast Fourier transform (FFT), an efficient algorithm to compute the DFT.
フーリエ変へん換かん
Continuous Fourier transform; DFT is its discrete counterpart.

From 離散 (discrete) + フーリエ (Fourier) + 変換 (transform). A direct calque of the English term.