RADAR CLUTTER MODELING OF MANMADE STRUCTURES

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RADAR CLUTTER MODELING OF MAN-MADE STRUCTURES

• Koray Yilmaz
• Supervisor Feza Arikan, Assoc. Prof.
• Department of Electric and Electronic Engineering
• Hacettepe University

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Contents

• Introduction
• Radar Clutter Modeling
• Proposed Study
• Conclusion

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Introduction

• Radar clutter consists of backscatters from all
  the objects that are in the radar beam except the
  main target.
• Sea, vegetation, buildings and cars can cause
  clutter signals.
• If the appropriate signal models are obtained,
  then it will be easier to suppress clutter
  signals and emphasize desired target signals.
• We can simulate radar clutter on computer using
  clutter models.

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Radar Clutter Modeling (1/2)

• Return signals from man-made structures have to
  be determined statistically.
• The variation of return signals depends on
  configuration, line-up and density of the
  structure.
• Using data sets, return signal of a structure can
  be expressed as a histogram.
• Statistical models are constructed from these
  histograms.

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Data Set and Histogram

• Data set and histogram for an urban clutter model
  (X Band, HH polarized and 600 grazing angle).

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Radar Clutter Modeling (2/2)

• Most common method used for generating clutter
  signals from statistical models is Spherically
  Invariant Random Vector (SIRV) method.
• In order to model different types of correlated
  non-Gaussian radar clutter, a library of
  multivariate non-Gaussian pdf's can be developed
  using SIRV's.

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Examples for SIRV method

• The frequency histograms for the generated data
  and corresponding theorical probability density
  functions.

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Proposed Study (1/2)

• Generation of clutter amplitude signals.
• Clutter effects of man-made structures will
  investigate and clutter amplitude signal will
  generate.
• Man-made structures are
• - Buildings
• - Roads
• - Vehicles

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Proposed Project (2/2)

• Specification of statistical models that are used
  for clutter amplitude signal modeling of man-made
  structures.
• MATLAB for generating clutter amplitude signal
  using SIRV.

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Conclusion

• Radar clutter consists of signals which arrive to
  radar receivers from objects that are in the
  radar beam other than the intended target.
• We can simulate radar clutter on computer using
  clutter models.
• SIRV is the one of the computer generation
  methods.
• Radar clutter amplitude signals will be generated
  on computer using SIRV method and MATLAB.

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References

• M. Rangaswamy, D. Weiner and A. Öztürk,
  Computer Generation of Non-Gaussian Radar
  Clutter, IEEE Transactions on Aerospace and
  Electronic Systems, Vol. 31, No. 1, pp. 106-115,
  January 1995.

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Thanks

• Thank you for your attention.
• I will appreciate any questions, if any.