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Signal processing techniques for radar based subsurface and through wall imaging

  • Author / Creator
    Morales, Jorge M
  • The ground penetrating radar (GPR) and through-wall radar detect and identify a target, by transmitting electromagnetic signals and processing the reflected signal. Migration had been a common method used in radar signal processing to obtain geophysical images and sketch the reflected data in the correct scatering position. In this thesis a study about different imaging and migration techniques, is performed. An improved radar migration imaging technique is then proposed by taking into account the effect of a two media environment in the signal velocity and signal path. The signal reflected coefficients are refocused on a possible target location or locations, ensuring a strong reflection in the presence of a target and a low reflection otherwise. The F-K migration is the baseline technique in our image generation. The F-K will migrate the focused data and obtain a 2-D matrix with the approximate scatering coefficients locations with respect to the depth. This focusing, windowing and F-K process are repeated several times along a grid, allowing us to reconstruct a sectional image which will be filtered using the filtering after backprojection process obtaining a deblurred reconstructed image.

  • Subjects / Keywords
  • Graduation date
    2012-11
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3MG6J
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Electrical and Computer Engineering
  • Specialization
    • Biomedical Engineering
  • Supervisor / co-supervisor and their department(s)
    • Mandal, Mrinal (Electrical and computer engineering)
    • Karumudi, Rambabu (Electrical and computer engineering)
  • Examining committee members and their departments
    • Nowrouzian, Behrouz (Electrical and computer engineering)
    • Karumudi, Rambabu (Electrical and computer engineering)
    • Mandal, Mrinal (Electrical and computer engineering)
    • Ray, Nilanjan (Computing Science)