Second-Generation Discrete Fourier Transform Signal Processor for Laser Velocimetry

Abstract

A high speed, single-board digital signal processor has been developed at the AEDC for frequency domain analysis of laser velocimeter signals. The analysis is facilitated by the discrete Fourier transform (DFT), which is used to determine a signal's spectral content. The processor consists of a microprogrammable microprocessor controlling circuitry specially designed for fast, efficient computation of the DFT. The DFT computation circuitry, which features a dual multiplier/accumulator architecture, allows computation of one DFT coefficient per 11.3 microsec for 113 data samples. The microprocessor searches for a dominant maximum in the frequency spectrum corresponding to the frequency of the input signal burst. Results from a laboratory evaluation of the processor are also included. Keywords include: Digital signal processing; Laser velocimeter signal; Discrete Fourier transform; Windowing; Signal conditioning; and Electro-optics.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1986
Accession Number
ADA176519

Entities

People

  • Bruce W. Bomer
  • Thomas C. Layne

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Central Processing Units
  • Circuit Boards
  • Computations
  • Computers
  • Digital Signal Processing
  • Discrete Fourier Transforms
  • Frequency
  • Frequency Domain
  • Integrated Circuits
  • Laser Velocimeters
  • Measurement
  • Printed Circuits
  • Signal Processing
  • Test And Evaluation
  • Velocimeters
  • Very Large Scale Integration

Fields of Study

  • Engineering

Readers

  • Computer Engineering
  • Image Processing and Computer Vision.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy