Multipath VLF Propagation Effects on Correlation Receivers,

Abstract

The effect of electromagnetic propagation at very low frequency in the earth ionosphere waveguide can distort wideband communication waveforms and produce a splitting of the correlation peak of the received signal at a model interference null where multipath signals arrive out of phase. Propagation from an inclined dipole antenna trailed behind an orbiting aircraft can cause split correlation pattern to fluctuate throughout the orbit period. For the case of an MSK (minimum-shift-keying) signal format, expressions and graphs are given for the correlation vector, as a function of receiver synchronization time and aircraft flight direction. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 18, 1981
Accession Number
ADA108408

Entities

People

  • F. J. Rhoads
  • Francis J. Kelly
  • H. M. Beck
  • J. P. Hauser

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Antenna Components
  • Antennas
  • Communication Channels
  • Communication Systems
  • Correlators
  • Doppler Effect
  • Electric Fields
  • Equations
  • Frequency
  • Modulation
  • Phase Shift
  • Radio Frequency
  • Security
  • Transmitters
  • Transmitting
  • Very Low Frequency
  • Waveforms

Fields of Study

  • Engineering
  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Radio communications and signal processing.

Technology Areas

  • Space
  • Space - Orbital Debris