Mode filtering approaches to acoustic source depth discrimination

Vincent E. Premus, James Ward, Christ D. Richmond

Research output: Contribution to journalConference article

13 Scopus citations

Abstract

Mode filtering in passive sonar represents a class of linear beamforming approaches in which the steering vectors are parameterized by the depth-dependent mode functions and horizontal wavenumbers that characterize propagation in a shallow waveguide. In this work, a mode-filter beamformer is combined with different decision metrics for the purpose of classifying the depth of an acoustic source. The concept is based on the premise that deep and shallow sources robustly separate in mode space. Experimental results using SwellEx-96 vertical line array data will be shown. Performance dependence on parameters such as frequency and aperture sampling will be discussed.

Original languageEnglish (US)
Pages (from-to)1415-1420
Number of pages6
JournalConference Record - Asilomar Conference on Signals, Systems and Computers
Volume2
StatePublished - Dec 1 2004
Externally publishedYes
EventConference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: Nov 7 2004Nov 10 2004

ASJC Scopus subject areas

  • Signal Processing
  • Computer Networks and Communications

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