ASMUTS - Acoustic Signature Measurements and Unaugmented Tracking System

Abstract

A real-time passive method for bearing estimation has been developed for underwater acoustic targets that capitalizes on apriori knowledge of the target's radiated acoustic signature. The sensor system is a horizontal planar array (HPA) composed of nineteen (19) hydrophones, configured as three nested hexagons, with a redundant center hydrophone. The data telemetry system supports a frequency range of 10 Hz - 1600 Hz. Data is processed with 1 Hz resolution (1590 frequencies). Azimuth uncertainty estimates and spatial associations are used to remove frequencies dominated by noise. Azimuths for potential target frequencies are averaged in bandwidths proportional to frequency, temporally and spatially associated, and correlated against expected signatures. Simulations in MATLAB with spatially correlated noise show good performance down to 6 dB signal-to-noise ratio (SNR) for an 8-tonal narrowband target.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2000
Accession Number
ADA392220

Entities

People

  • Edmond S. Sheffield

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Signatures
  • Algorithms
  • Bandwidth
  • Digital Data
  • Digital Signal Processing
  • Doppler Effect
  • Frequency
  • Frequency Bands
  • Measurement
  • Moving Targets
  • Multiple Targets
  • Narrowband
  • Noise
  • Signal Processing
  • Target Signatures
  • Triangles
  • Undersea Warfare

Fields of Study

  • Physics

Readers

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