Line-of-Sight Wideband Propagation

Abstract

igates the limitations on the use of wideband pseudo-noise carriers imposed by the tropospheric propagation medium in the 4-10 GHz band. In addition channel measurement experiments are specified to check the analytical results. A detailed examination is given of the effects of refractive layers, volume scattering, surface scattering and reflection, and the frequency selectivity of the atmospheric constituents. The effect of discrete multipath on the error rate performance of a representative pseudo-noise carrier data transmission modem is investigated. Also a two-correlator anti-multipath modem is investigated as a means to counteract the discrete multipath and is found to improve performance. For channel measurements, a pseudo-noise probing signal and a single time-multiplexed correlation demodulation is found to be the most economical for providing the essential data for channel parameter extraction and stored channel simulations.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1973
Accession Number
AD0762939

Entities

People

  • Charles J. Boardman
  • Joseph K. Derosa
  • Phillip A. Bello

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aircrafts
  • Atmospheric Motion
  • Computational Science
  • Correlation Techniques
  • Doppler Effect
  • Electromagnetic Wave Propagation
  • Frequency Bands
  • Frequency Shift
  • Geometry
  • Meteorology
  • Multiple Access
  • Refraction
  • Refractive Index
  • Scattering
  • Two Dimensional
  • Wave Propagation
  • Waveforms

Fields of Study

  • Engineering

Readers

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