Frequency Dependent Quality of HF-Communication Channels Estimated by Superresolution Direction Finding

Abstract

While Very High Frequency (VHF) communication systems develop rapidly, but nonetheless high frequency (HF) links remain important, particularly for military communication. Their efficiency depends strongly on the ionospheric conditions, especially during the passage of ionospheric disturbances. Usually networks of ionosondes are used to control the ionospheric state. But nonetheless the occurrence of Traveling Ionospheric Disturbances (TIDs) has attracted much less attention in frequency management. In this study a super-resolution HF direction finding (DF) system has been used to estimate the quality of HF-communication channels by the variation of the direction of arrival (DOA) of the waves impinging onto an array antenna. As another source for signal degradation the interference of different propagation modes has been found.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2006
Accession Number
ADA478825

Entities

People

  • Stefan Hawlitschka

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Algorithms
  • Angle Of Arrival
  • Antenna Radiation Patterns
  • Antennas
  • Communication Channels
  • Communication Systems
  • Data Analysis
  • Direction Finding
  • Frequency
  • Information Processing
  • Ionosondes
  • Ionosphere
  • Ionospheric Disturbances
  • Measurement
  • Multipath Transmission
  • Radio Communications

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computer Networking
  • Radar Systems Engineering.

Technology Areas

  • Fully Networked C3
  • Fully Networked C3 - Command and Control