The Measurement of Microwave Multipath in an Airport Environment.

Abstract

Multipath in an operating airport, and its impact on the performance of a Microwave Landing System (MLS) is an important aspect of the development of these systems. Test programs on the candidate MLS systems developed in the U.S. were conducted in areas that do not emulate large commercial airports. In order to better evaluate multipath in a realistic environment, measurements of reflected signals at the MLS operating frequency were performed, and the results used to develop or modify a computer simulation program. Both a cw system and a pseudorandom noise (PN) channel probe were used in the measurement program. This report presents the results of multipath measurements made on (1) airport terminal buildings, (2) large maintenance hangars, and (3) aircraft on the surface of the airport. Results indicate that significant reflection levels are prevalent from these sources, and could produce a multipath reception problem at the receiver of an aircraft approaching the runway. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1977
Accession Number
ADA037791

Entities

People

  • L. E. Pratt
  • R. W. Hubbard
  • W. J. Hartman

Tags

Communities of Interest

  • Air Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Aircraft Landings
  • Aircrafts
  • Airports
  • Amplifiers
  • Communication Systems
  • Computer Simulations
  • Frequency
  • Geometry
  • Horn Antennas
  • Measurement
  • Microwave Equipment
  • Microwave Landing Systems
  • Parabolic Antennas
  • Standards
  • Test Equipment
  • Transmitters
  • United States

Fields of Study

  • Engineering

Readers

  • Pavement Materials Engineering.
  • Radio communications and signal processing.
  • Systems Analysis and Design