Adaptive Noise Cancellation Applied to the NUWES Test Ranges

Abstract

This thesis investigates the application of adaptive filtering at the NUWES test ranges. Two adaptive algorithms, least-mean-squares and recursive- least-squares are studied. To facilitate the investigation, a model of the test ranges was developed. This model accounts for spherical spreading and linear attenuation of the propagated acoustic signals as well as the effects of doppler shift, multipath, and finite propagation delay time. After describing the model, the adaptive filtering algorithms are briefly explained. Then, two schemes of adaptive filtering, adaptive noise cancellation and adaptive line enhancement, are applied to the model. Simulation results of the noise cancellation and line enhancement schemes are presented for several scenarios.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1991
Accession Number
ADA245961

Entities

People

  • Dale W. Herdegen

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Signals
  • Adaptive Filters
  • Algorithms
  • Attenuation
  • Bandpass Filters
  • Classification
  • Computational Science
  • Detectors
  • Doppler Effect
  • Equations
  • Filtration
  • Frequency
  • Frequency Shift
  • Losses
  • Seabed
  • Simulations
  • United States

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Radar Systems Engineering.