Transient Signal Distortion in a Multipath Environment

Abstract

The classification of transient signals is facilitated if propagational distortion is removed. This distortion can be removed if the ocean impulse response from source to receiver is known. The ocean impulse response is, however, very sensitive to source location and the ocean environment. It is shown that for a bottom-mounted receiver and almost normal incidence, distortion of a 244-Hz transient signal envelope can be accounted for if the time delays and relative amplitudes of the ocean impulse response are accurately known. These time delays and amplitudes are extracted from transient data for the known source case. This work provides the motivation for the development of high-resolution, time-delay estimation algorithms to be presented in a companion paper. These algorithms will be tested on the data presented in this paper for the unknown source case.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA230737

Entities

People

  • R. L. Field

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Algorithms
  • Amplitude
  • Atlantic Ocean
  • Classification
  • Delta Functions
  • Detection
  • Distortion
  • Environment
  • Equations
  • High Resolution
  • Military Research
  • Motivation
  • Ocean Environments
  • Oceans
  • Seabed
  • Sensor Networks

Fields of Study

  • Engineering

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computational Modeling and Simulation
  • Phased Array Antenna Design.