Alternative Approach to Passive Sonar

Abstract

An alternative approach to spatial processing for passive sonar is proposed and discussed. It is considered to offer better performance than conventional and high-resolution beamforming. In particular, the approach makes it possible to construct a broadband beamformer which outperforms high-resolution techniques: it provides better resolution, is sidelobe-free, and allows the detection of rather weak sound sources. The approach is based on the analysis of the statistical properties of the different sound sources of interest and allows controlled extraction of the information of interest. It is also possible with this approach to construct multibeam LOFAR plots which display more than one beam simultaneously without loss of further information. Since the proposed approach abandons the estimation of the cross-spectral matrix, it has no greater requirement viz-a-vie the stationarity of the signals than the conventional approach has.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1987
Accession Number
AD1114993

Entities

People

  • W. M. Zimmer

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Bottom Bounce
  • Broadband
  • Cross Correlation
  • Data Reduction
  • Detection
  • Frequency
  • High Resolution
  • Information Science
  • Measurement
  • Passive Sonar
  • Power Levels
  • Signal Processing
  • Spectra
  • Spectral Lines
  • Statistics
  • Steering

Fields of Study

  • Engineering

Readers

  • Acoustical Oceanography.
  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Statistical inference.