Adaptive Techniques for Troposcatter

Abstract

This report examines the performance of phased array antennas with adaptive combining for troposcatter communications. Diversity is commonly employed to combat fading on troposcatter links. Diversity may be derived from a phased array by adaptive combining of the element outputs (space diversity) or equivalently by forming a set of beams via a Butler matrix transformation (angle diversity). A number of new results describing the performance of both azimuth and elevation angle diversity systems using phased arrays are derived and performance bounds for both azimuth and elevation diversity are found. A new class of sub-optimal combiners is examined. The effect of implicit diversity on wideband systems is considered. The degradation due to channel measurement errors is also determined. A measurement program is proposed to verify the results. The computer program which performs the common volume integration is described.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1984
Accession Number
ADA142226

Entities

People

  • Alfonso Malaga
  • John N. Pierce
  • Mark S. Wallace
  • Steen A. Parl

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Antennas
  • Bandwidth
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Data Science
  • Delay Lines
  • Diffraction
  • Gaussian Processes
  • Geometry
  • Information Science
  • Intersymbol Interference
  • Refractive Index
  • Scattering
  • Three Dimensional
  • Two Dimensional
  • Waveforms

Fields of Study

  • Engineering

Readers

  • Phased Array Antenna Design.
  • Radio communications and signal processing.

Technology Areas

  • Space