Airborne Radar Motion Compensation Techniques, Evaluation of TACCAR

Abstract

Coherent signal processing in many classes of airborne radar systems is limited by the methods used to compensate for platform motion. Platform motion causes doppler shifts of returns which vary with the angle between the velocity vector and the scatterer. Because of the finite antenna beamwidth and finite transmitted plus length, the returns from many scatterers are received simultaneously. These returns have different doppler shifts which result in a spectrum of received doppler frequencies. This spectrum degrades the performance of radar systems that coherently process these returns. Time Average Clutter Coherent Airborne Radar (TACCAR) is a widely used technique to compensate for the component of motion which is parallel to the axis of the beam. This report evaluates TACCAR in terms of its improvement to moving target indicator (MTI) performance. It is shown that MTI performance can be improved significantly with extentions to the TACCAR concept.

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Document Details

Document Type
Technical Report
Publication Date
Apr 12, 1972
Accession Number
AD0893904

Entities

People

  • Grealie A. Andrews Jr

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Airborne Early Warning
  • Aircrafts
  • Antennas
  • Compensation
  • Doppler Effect
  • Early Warning Systems
  • Frequency
  • Military Research
  • Moving Target Indicator Radar
  • Moving Targets
  • Platforms
  • Radar
  • Security
  • Spectra
  • Targets
  • Test And Evaluation

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Sensor Fusion and Tracking Systems.