PROCESSING OF DATA FROM SONAR SYSTEMS. VOLUME 4

Abstract

This report, and Supplement 1, examines performance of digital optimal and suboptimal detectors in an interference-dominated environment. Costs of clipping and sampling and the problem of recovering clipping losses are evaluated. Detection threshold variations dependent on measured noise parameters are also studied. Using noise power as a parameter shows non- parametric properties asymptotically independent of the noise amplitude distribution. Reduced dependency on noise properties can also be achieved by a zero count at each hydrophone. An active receiver using widely separated receivers for reverberation and noise-dominated conditions, and the effect of linear frequency modulation on the transmitted signal, are examined. Computation of ambient noise directivity is reported for shallow depths.

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Document Details

Document Type
Technical Report
Publication Date
Dec 27, 1967
Accession Number
AD0389628

Entities

People

  • F. S. Hill Jr.
  • Morton Kanefsky
  • Peter M. Schultheiss

Organizations

  • General Dynamics Electric Boat

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Active Sonar
  • Ambient Noise
  • Classification
  • Computations
  • Detection
  • Detectors
  • False Alarms
  • Frequency
  • Frequency Modulation
  • Instrumentation
  • Modulation
  • Probability
  • Security
  • Shallow Depth
  • Signal Processing
  • Standards
  • Warning Systems

Readers

  • Acoustical Oceanography.
  • Approximation Theory.
  • Radio communications and signal processing.