OPTIMUM AND SUB-OPTIMUM TECHNIQUES FOR EXTRACTION OF INPUT SIGNALS FROM THE OUTPUTS OF NOISY TIME-VARIABLE MULTIPATH CHANNELS

Abstract

In underwater communication and echo-ranging the transmitted signal will generally reach the receiver via several distinct paths. The resultant signal is referred to as a multipath signal. The first part of this report derives the integral equation that defines the optimum filter for extracting the transmitted signal from a noise-corrupted multipath signal. The solution of this equation is not considered to be easily accessible. The second part of the report describes a practical technique for deriving near-optimum extraction filters applicable to echo-ranging situations involving reflections from a smooth ocean surface.

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Document Details

Document Type
Technical Report
Publication Date
Dec 15, 1967
Accession Number
AD0826522

Entities

People

  • F. Bryn

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Bandwidth
  • Echo Ranging
  • Equations
  • Errors
  • Extraction
  • Fourier Series
  • Frequency
  • Frequency Bands
  • Frequency Response
  • Gaussian Noise
  • Integral Equations
  • Integrals
  • Intervals
  • Multipath Channels
  • Noise
  • Range Finding
  • Time Domain

Fields of Study

  • Engineering

Readers

  • Acoustical Oceanography.
  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Radio communications and signal processing.