ELF Nonlinear Noise Processing Experimental Measurements. Part 1. Preliminary Results, for July and October 1975.

Abstract

A hybrid analog-digital signal processing method has been developed to investigate the potential of employing nonlinear noise processing to improve the signal-to-noise ratio (S/N) in extremely low-frequency (ELF) communication systems. Preliminary results suggest that significant improvements in S/N can be achieved if careful attention is given to clipping levels for high-amplitude atmospheric noise spikes and notch-filtering man-made interfering signals. Analysis of ELF noise data from Norway and Italy indicate, however, that the achievable improvemnt may be greater under low-noise conditions than under high-noise conditions. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1976
Accession Number
ADA021975

Entities

People

  • John R. Davis
  • William D. Meyers

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Communication Systems
  • Digital Signal Processing
  • Extremely Low Frequency
  • Filtration
  • Frequency
  • Low Noise
  • Measurement
  • Noise
  • Signal Processing

Readers

  • Acoustics.
  • Radar Systems Engineering.
  • Urban Planning and Geography.