The fast Fourier transform (FFT) is a computationally effective method for computing such convolutions. For a reference on this material, refer to Press et al. (1988).

The resulting signal, an interferogram, is a complex pattern that, through Fourier Transformation, is converted into a spectrum representing molecular absorption as a function of wavelength or ...

A mathematical theorem stating that a PERIODIC function f(x) which is reasonably continuous may be expressed as the sum of a series of sine or cosine terms (called the Fourier series), each of which ...