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Title: Interference Mitigation Effects on Synthetic Aperture Radar Coherent Data Products

Abstract

For synthetic aperture radar image products interference can degrade the quality of the images while techniques to mitigate the interference also reduce the image quality. Usually the radar system designer will try to balance the amount of mitigation for the amount of interference to optimize the image quality. This may work well for many situations, but coherent data products derived from the image products are more sensitive than the human eye to distortions caused by interference and mitigation of interference. This dissertation examines the e ect that interference and mitigation of interference has upon coherent data products. An improvement to the standard notch mitigation is introduced, called the equalization notch. Other methods are suggested to mitigation interference while improving the quality of coherent data products over existing methods.

Authors:
 [1]
  1. Oklahoma State Univ., Stillwater, OK (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1173187
Report Number(s):
SAND2014-20104T
547434
DOE Contract Number:
AC04-94AL85000
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Musgrove, Cameron. Interference Mitigation Effects on Synthetic Aperture Radar Coherent Data Products. United States: N. p., 2014. Web.
Musgrove, Cameron. Interference Mitigation Effects on Synthetic Aperture Radar Coherent Data Products. United States.
Musgrove, Cameron. 2014. "Interference Mitigation Effects on Synthetic Aperture Radar Coherent Data Products". United States. doi:.
@article{osti_1173187,
title = {Interference Mitigation Effects on Synthetic Aperture Radar Coherent Data Products},
author = {Musgrove, Cameron},
abstractNote = {For synthetic aperture radar image products interference can degrade the quality of the images while techniques to mitigate the interference also reduce the image quality. Usually the radar system designer will try to balance the amount of mitigation for the amount of interference to optimize the image quality. This may work well for many situations, but coherent data products derived from the image products are more sensitive than the human eye to distortions caused by interference and mitigation of interference. This dissertation examines the e ect that interference and mitigation of interference has upon coherent data products. An improvement to the standard notch mitigation is introduced, called the equalization notch. Other methods are suggested to mitigation interference while improving the quality of coherent data products over existing methods.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2014,
month = 5
}

Thesis/Dissertation:
Other availability
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  • For synthetic aperture radars radio frequency interference from sources external to the radar system and techniques to mitigate the interference can degrade the quality of the image products. Usually the radar system designer will try to balance the amount of mitigation for an acceptable amount of interference to optimize the image quality. This dissertation examines the effect of interference mitigation upon coherent data products of fine resolution, high frequency synthetic aperture radars using stretch processing. Novel interference mitigation techniques are introduced that operate on single or multiple apertures of data that increase average coherence compared to existing techniques. New metricsmore » are applied to evaluate multiple mitigation techniques for image quality and average coherence. The underlying mechanism for interference mitigation techniques that affect coherence is revealed.« less
  • Introduced a novel contrast metric in combination with traditional metrics to evaluate quality of coherent aperture radar, data products.
  • Synthetic aperture radar (SAR) has become an important tool for remote sensing of the environment. SAR is a set of digital signal processing algorithms that are used to focus the signal returned to the radar because radar systems in themselves cannot produce the high resolution images required in remote sensing applications. To reconstruct an image, several parameters must be estimated and the quality of output image depends on the degree of accuracy of these parameters. In this thesis, we derive the fundamental SAR algorithms and concentrate on the estimation of one of its critical parameters. We show that the commonmore » technique for estimating this particular parameter can sometimes lead to erroneous results and reduced quality images. We also employ time-frequency analysis techniques to examine variations in the radar signals caused by platform motion and show how these results can be used to improve output image quality.« less