Improved GPR image quality by truncating the bandwidth of the Fourier Transform in 2D diffraction tomographic inversion

Lum, Sebastian, Tang, Tee G., & Lyall, James S. (2008) Improved GPR image quality by truncating the bandwidth of the Fourier Transform in 2D diffraction tomographic inversion. In IEEE International RF and Microwave Conference, 2-4 December 2008, Kuala Lumpur, Malaysia.

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Diffraction tomography (DT) has been applied in ground penetrating radar (GPR) to obtain images of buried objects. In order to obtain a unique solution for the object function, a maximum frequency range should be used in a DT inversion routine. In this paper, a method is proposed to appropriately truncate the frequency range of the Fourier-transformed (FT) scattered field for a 2D DT inversion routine. This is achieved by determining the variation of the phase in the FT scattered field. The number of zero-crossings of the FT phase along the spatial axis is counted and a moving-average filter is applied to enable proper bandwidth selection. Numerical simulations are demonstrated using synthetic data with additive white Gaussian noise.

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ID Code: 18017
Item Type: Conference Paper
Refereed: Yes
Keywords: Diffraction Tomography, Fourier Transform, Ground Penetrating Radar
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > GEOMATIC ENGINEERING (090900)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2008 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 18 Feb 2009 06:22
Last Modified: 09 Jun 2010 13:24

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