7.00.02 - IFFT - Aster Analytics

Teradata Aster® Analytics Foundation User GuideUpdate 2

Aster Analytics
Release Number
September 2017
Content Type
Programming Reference
User Guide
Publication ID
English (United States)
Last Update

The IFFT function uses an inverse Fast Fourier Transform (IFFT) algorithm (also called a Fourier synthesis algorithm) to reverse the Fast Fourier Transform (FFT) performed by the FFT function; that is, the IFFT function takes a frequency domain representation and combines the contributions of all the different frequencies to recover the original signal. A signal can be either real or complex, and can have one, two, or three dimensions. If the signal length is not a power of two, the function either pads or truncates it to the closest power of two.