Suppression of Doppler Ambiguities for Linear Sparse Arrays

Abstract

A key trade-off in airborne or spaceborne synthetic aperture radar (SAR) design involves the pulse repetition frequency (PRF) and the number and location or range and Doppler ambiguities. The associated design issues are complicated further when the system involves a sparse array. A methodology is formulated based on selecting the PRF to avoid range ambiguities in the envelope mainbeam. The effects of the Doppler ambiguities falling within the envelope mainbeam are mitigated by using an optimal algorithm to generate weights that place nulls in the pattern of the (sparse or contiguous) array in the directions of the Doppler ambiguities. This approach can be used for the analysis and design of airborne or spaceborne SAR systems with contiguous or sparse arrays.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2006
Accession Number
ADA444652

Entities

People

  • Jaime R. Roman
  • James C. Nelander
  • John D. Keisling
  • John W. Garnham
  • Lynn M. Black

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Airborne
  • Algorithms
  • Ambiguity
  • Antenna Arrays
  • Antennas
  • Arrays
  • Constellations
  • Frequency
  • Low Earth Orbits
  • Radar
  • Simulations
  • Space Based
  • Spaceborne
  • Spacecraft
  • Standards
  • Synthetic Aperture Radar

Fields of Study

  • Engineering

Readers

  • Linear Algebra
  • Radar Systems Engineering.
  • Systems Analysis and Design