👉 The Fourier transform is a mathematical transformation that converts an original function into its frequency domain representation. It maps functions to their frequency response, or the amplitude of the signal at each frequency in the range of frequencies from zero to infinity. In other words, it maps a continuous-time signal (or time-domain signal) into the form of an impulse train for Fourier analysis purposes. This is because the Fourier transform can be used to find the frequency components that contribute to the original function's amplitude or power at each
