Enhancing Long Range Sonar Performance in Range-Dependent Fluctuating Ocean Waveguides by Mitigating Biological Clutter and Environmental Reverberation

Abstract

Determine the temporal and spatial characteristics, and physical mechanisms for clutter and environmental reverberation in long range underwater acoustic imaging and surveillance systems. This understanding is used to develop operational and signal processing techniques to distinguish clutter from scattered returns due to man-man targets, and to determine the limits placed by environmental reverberation on target detection. In the second area, the statistical properties of broadband acoustic signals transmitted and scattered in range-dependent ocean waveguides are examined. This knowledge is then used to determine the extent to which environmental variabilities limit our ability to perform target localization and parameter estimation through beamforming and matched-filtering broadband data for imaging systems in fluctuating and dispersive ocean waveguides.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2013
Accession Number
ADA598576

Entities

People

  • Purnima Ratilal

Organizations

  • Northeastern University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Signals
  • Ambient Noise
  • Artificial Intelligence
  • Broadband
  • Fish
  • Frequency
  • Frequency Bands
  • Kalman Filters
  • Measurement
  • Narrowband
  • Odontocetes
  • Range Finding
  • Reverberation
  • Scattering
  • Shallow Water
  • Waveguides

Readers

  • Acoustical Oceanography.