ELF Noise Processing

Abstract

The report describes noise processing experiments with ELF (3 to 300 Hz) atmospheric noise and signals in the 40- to 80-Hz range. The primary purpose of the experiments was to design the noise processing portion of a submarine-borne receiver which would minimize the required transmitter power of the Sanguine communications system. The recommended noise processor included a nonlinearity followed by a matched-filter and consisted of the following functions: (1) a compensating (or whitening) fiber, (2) a pre-notch filter clipper, (3) notch filters at power line frequencies, (4) a post-notch filter clipper, and (5) a phase-coherent linear matched filter.

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Document Details

Document Type
Technical Report
Publication Date
Jan 13, 1972
Accession Number
AD0739907

Entities

People

  • Andrew S. Griffiths

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Angle Of Arrival
  • Background Noise
  • Data Science
  • Filters
  • Filtration
  • Frequency
  • Frequency Shift
  • Gaussian Noise
  • Gaussian Processes
  • Information Science
  • Loop Antennas
  • Matched Filters
  • Probability Density Functions
  • Sine Waves
  • Standards
  • Statistical Analysis

Readers

  • Optical Physics and Photonics.
  • Radar Systems Engineering.