English Dictionary

Fourier transform

noun

(mathematical analysis, harmonic analysis, physics, electrical engineering) A particular integral transform that when applied to a function of time (such as a signal), converts the function to one that plots the original function's frequency composition; the resultant function of such a conversion.

The Fourier transform is a mathematical analysis technique used to transform a function into its frequency domain representation.

意味（1）

(mathematical analysis, harmonic analysis, physics, electrical engineering) A particular integral transform that when applied to a function of time (such as a signal), converts the function to one that plots the original function's frequency composition; the resultant function of such a conversion.

Fourier transforms are not limited to acting on functions of time, but the domain of the original function is commonly called the time domain.