The Fast Fourier Transform as a Signal Processing Technique.

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)

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Document Details

Document Type
Technical Report
Publication Date
May 10, 1983
Accession Number
ADA131011

Entities

People

  • C. A. Ledoux

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Amplitude
  • Analog To Digital Converters
  • Computers
  • Conversion
  • Data Processing
  • Fast Fourier Transforms
  • Frequency Domain
  • Integrals
  • Measurement
  • Operating Systems
  • Signal Detection
  • Signal Processing
  • Sine Waves
  • Spectra
  • Spectral Lines
  • Time Domain

Readers

  • Approximation Theory.
  • Speech Processing/Speech Recognition.
  • Systems Analysis and Design