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

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 tr...

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Bibliographic Details
Published in2008 IEEE International RF and Microwave Conference pp. 391 - 394
Main Authors Lum, S.H.-H., Tee Tang, Lyall, J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2008
Subjects
Bandwidth
Buried object detection
Diffraction
Diffraction tomography
Filters
Fourier Transform
Fourier transforms
Frequency
Ground penetrating radar
Image quality
Radar scattering
Tomography
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Summary: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.
ISBN:9781424428663
1424428661
DOI:10.1109/RFM.2008.4897397