ELF/VLF/LF Propagation and System Design

Abstract

The effects of propagation conditions in the ELF/VLF/LF frequency band on the design and performance of digital communications systems are described in this report. Also, discussed in this report is the communications channel from a ground-based or airborne transmitting antenna through the earth- ionosphere waveguide to the receiver. Questions about coverage, noise, dispersion, time variance, and propagation disturbances are also summarized here. Keywords include: VLF Propagation, LF Minimum shift keying, ELF TACAMO, Dispersion, and Earth-ionosphere waveguide.

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Document Details

Document Type
Technical Report
Publication Date
Jun 23, 1987
Accession Number
ADA183261

Entities

People

  • Francis J. Kelly

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Artificial Satellites
  • Bandwidth
  • Communication Channels
  • Communication Systems
  • Doppler Effect
  • Electromagnetic Wave Propagation
  • Frequency
  • Frequency Bands
  • High Latitudes
  • Magnetic Fields
  • Radio Frequency
  • Radio Transmission
  • Radio Waves
  • Refractive Index
  • Wave Propagation
  • Waveforms

Fields of Study

  • Engineering

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Radar Systems Engineering.
  • Radio communications and signal processing.