Implementation of the Phase Difference Trace Function for a Circular Array.

Abstract

Components necessary for the implementation of the trace function concept in a circular array were designed and constructed. The performance of the degenerate trace function for a narrowband signal in the presence of correlated noise was examined. The results agree with theoretical values and illustrate the threshold effect and phase unwrapping problems. Using a 97.5cm diameter array in air, for a population base of ten sets of data, trace function measurements were taken at various signal to noise ratios between 28.2dB and -7.8dB. Calculated beamwidths, taken to be twice the standard deviation of the estimated bearing, were as follows: 28.2dB - 1.6 deg, 10.2dB - 2.2 deg, -1.8dB - 2.8 deg. The threshold appeared to be in the range of -4.8dB. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1980
Accession Number
ADA092195

Entities

People

  • George William Rollings

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Amplifiers
  • Anechoic Chambers
  • Cable Assemblies
  • Circuit Boards
  • Electrical Engineering
  • Electronic Components
  • Frequency
  • Frequency Bands
  • Low Noise
  • Measurement
  • Microphones
  • Power Supplies
  • Printed Circuit Boards
  • Printed Circuits
  • Spectrum Analyzers
  • Statistical Analysis

Readers

  • Acoustics.
  • Approximation Theory.
  • Seismology