Accession Number : ADA131011

Title :   The Fast Fourier Transform as a Signal Processing Technique.

Descriptive Note : Technical document,

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEWPORT RI

Personal Author(s) : Ledoux,C A

PDF Url : ADA131011

Report Date : 10 May 1983

Pagination or Media Count : 42

Abstract : The proliferation of digital equipment for use in making all types of measurements has necessitated drastic changes in the signal detection techniques used to quantify measured signals. More specifically, there has been an increased use of the kinds of digitizers whose output consists of sequential time slices of the measured signal in binary coded values that correspond to amplitude and time. This type of information is directly transferrable to a computer memory, where it can be processed by a wide variety of digital techniques. One of the most useful digital processes used to resolve amplitude and phase spectra from a digitized time-domain signal is the fast Fourier transform (FFT). This document attempts to give the reader a sound understanding of what the FFT does and how it can be applied to various measurement needs. (Author)

Descriptors :   *Fast fourier transforms, *Signal processing, *Methodology, Information processing, Digital systems, Waveforms, Analog to digital converters, Amplitude, Phase, Time domain, Subroutines, Spectra, Output

Subject Categories : Numerical Mathematics
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE