Analysis of Multipath Interference for APATS.

Abstract

Multipath propagation and the resulting interference are theoretically analyzed for a ballistic missile re-entry vehicle (RV) to aircraft telemetry link in order to predict performance parameters for the ARIA Phased Array Telemetry System (APATS). A basic two-path model incorporating direct and specularly reflected transmission is presented. Model calculations, which take into account RV and APATS antenna gain, polarization, sea state and Doppler shift, yield the depth and frequency of fade anticipated for several mission scenarios. RF fades associated with RV antenna pattern nulls and modulation distortion resulting from a combination of Doppler shift and relative path delay are tentatively identified as the principal sources of link degradation which will limit APATS support altitudes. Areas of continuing interest and work are described. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1981
Accession Number
ADA108797

Entities

People

  • G. A. Robertshaw

Organizations

  • MITRE Corporation

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Altitude
  • Amplitude Modulation
  • Antenna Radiation Patterns
  • Birds
  • Carrier Waves
  • Coordinate Systems
  • Doppler Effect
  • Elevation
  • Frequency
  • Geometry
  • Line Of Sight
  • Modulation
  • Multipath Interference
  • Multipath Transmission
  • Polarization
  • Telemetry

Readers

  • Aerial Unmanned Vehicle Swarm Micro Periodontal Dentistry.
  • Astronomy and Astrophysics.
  • Spectroscopy.