Improving the Resolution of Bearing in Passive Sonar Arrays by Eigenvalue Analysis.

Abstract

A method of improving the bearing-resolving capabilities of a passive array is discussed. This method is an adaptive beamforming method, having many similarities to the minimum energy approach. The evaluation of energy in each steered beam is preceded by an eigenvalue-eigenvector analysis of the empirical correlation matrix. Modification of the computations according to the eigenvalue structure result in improved resolution of the bearing of acoustic sources. The increase in resolution is related to the time-bandwidth product of the computation of the correlation matrix. However, this increased resolution is obtained at the expense of array gain. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1981
Accession Number
ADA111829

Entities

People

  • Don H. Johnson
  • Stuart Degraaf

Organizations

  • Rice University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Fields
  • Computer Simulations
  • Eigenvalues
  • Eigenvectors
  • Electrical Engineering
  • Engineering
  • Frequency
  • High Resolution
  • Linear Arrays
  • Noise
  • Passive Sonar
  • Plane Waves
  • Signal Processing
  • Simulations
  • Sonar Arrays
  • Steering
  • Test And Evaluation

Fields of Study

  • Engineering

Readers

  • Acoustical Oceanography.
  • Phased Array Antenna Design.