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An Experimental Digital Beamforming Sonar

  • L. C. Granger
  • P. L. Greene
  • G. Zilinskas

Abstract

Previous experimental results using a 250-kHz acoustic imaging system show the Potential usefulness of holographic processing in high resolution sonars 1,2 This paper presents the design and preliminary experimental results of a holographic sonar using a linear array, As presently configured, the system consists of a 128-element line array, a single preamplifier/sine-cosine channel, a cylindrical acoustic projector, an Altair 8800 digital microcomputer, and an HP 1335A storage display.

Keywords

Fast Fourier Transform Discrete Fourier Transform Preliminary Experimental Result Variable Gain Amplifier Azimuth Resolution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Marom, et. al., “Design and Preliminary Test of an Underwater Viewing System Using Sound Holography”, Third Inter-’national Symposium on Acoustical Holography, 1970.Google Scholar
  2. 2.
    Keating, et. al., “Complex On-Axis Holograms and Reconstruction Without Conjugate Images”, Fifth International Symposium on Acoustical Holography, 1973.Google Scholar
  3. 3.
    Brigham E. Oran, The Fast Fourier Transform 1973.Google Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • L. C. Granger
    • 1
  • P. L. Greene
    • 1
  • G. Zilinskas
    • 1
  1. 1.Bendix Electrodynamics DivisionNorth HollywoodUSA

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