A Hybrid Bistatic–Monostatic Radar Technique for Calibration-Free Estimation of Lossy Wall Parameters

Thajudeen, Christopher; Hoorfar, Ahmad

doi:10.1109/lawp.2016.2630006

Cited by 20 publications

(13 citation statements)

References 15 publications

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“…We refer the readers to Thajudeen et al (2011), Zhang et al (2001), Zarifi et al (2013), and Spagnolini (1997) for the inversion of complex permittivity and thickness of multilayered media. For the conventional single-layer subsurface, or a single-layer wall, analytical methods for estimation of the dielectric slab parameters were given in Thajudeen et al (2011) and Thajudeen and Hoorfar (2016). For multilayered subsurface medium, the number and parameter of each layer can be efficiently retrieved using a layer-stripping algorithm or the global optimization inverse scattering techniques (Spagnolini, 1997;Zhang et al, 2001;Zarifi et al, 2013).…”

Section: Numerical and Experimental Resultsmentioning

confidence: 99%

Three‐Dimensional Ground‐Penetrating Radar Imaging Through Multilayered Subsurface

Zhang

Hoorfar

2019

Radio Science

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Most of existing ground-penetrating radar (GPR) imaging algorithms are only capable of imaging of targets under a single-layer subsurface. In this paper, a generalized three-dimensional (3-D) fast imaging algorithm for GPR imaging of targets buried under multilayered subsurface is presented. The exploding reflection model is employed to simplify the imaging algorithm, and then the layered media dyadic Green's function is expanded in spectral form to facilitate the easy implementation of the imaging algorithm with fast Fourier transform. The wave propagation effects through multilayered subsurface are efficiently taken into account and are properly compensated for in the imaging formulation through the multilayer media dyadic Green's function. The linearization of the inversion scheme and utilization of fast Fourier transform resolve the time-consuming challenge in 3-D GPR imaging and make the imaging algorithm suitable in several applications concerning the diagnostics of a large probed region. Representative numerical and experimental examples are presented to show the effectiveness and efficiency of the proposed algorithm for 3-D GPR imaging through multilayered media.

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Section: Numerical and Experimental Resultsmentioning

confidence: 99%

Three‐Dimensional Ground‐Penetrating Radar Imaging Through Multilayered Subsurface

Zhang

Hoorfar

2019

Radio Science

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“…The estimation of wall parameters associated with single or multilayered building walls has been extensively studied in the past decade within the framework of a one-dimensional inverse scattering problem [27][28][29][30][31][32][33][34]. For a single-layer wall, radar-based closed-form estimation of the wall dielectric constant, conductivity, and thickness is given in [30,31].…”

Section: Numerical Resultsmentioning

confidence: 99%

Two- and Three-Dimensional Fast Intrawall Imaging with Microwave Tomographic Algorithm

Zhang

Hoorfar

Thajudeen

2018

International Journal of Antennas and Propagation

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A fast and efficient microwave tomographic algorithm is proposed for 2-D and 3-D real-time intrawall imaging. The exploding reflection model is utilized to simplify the imaging formulation, and the half-space Green's function is expanded in the spectral domain to facilitate the easy implementation of the imaging algorithm with the fast Fourier transform (FFT) and inverse fast Fourier transform (IFFT). The linearization of the inversion scheme and employment of FFT/IFFT in the imaging formula make the algorithm suitable for various applications pertaining to the inspection of a large probed region and allow real-time processing. Representative numerical and experimental results are presented to show the effectiveness and efficiency of the proposed algorithm for real-time intrawall characterization.

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“…In practice, however, these parameters can be estimated using an inversion scheme. The inversion of multilayered medium parameters has been well developed within the framework of one-dimensional inverse scattering in the past two decades [32][33][34][35]. For the conventional single layer subsurface, analytical methods for estimation of the dielectric slab parameters have been provided in [32,35].…”

Section: Performance Comparisonmentioning

confidence: 99%

“…The inversion of multilayered medium parameters has been well developed within the framework of one-dimensional inverse scattering in the past two decades [32][33][34][35]. For the conventional single layer subsurface, analytical methods for estimation of the dielectric slab parameters have been provided in [32,35]. For multilayered subsurface media, the number and parameters of each layer can be efficiently retrieved using a layer-stripping algorithm or global optimization inverse scattering techniques [33,34].…”

Section: Performance Comparisonmentioning

confidence: 99%

Performance Evaluation of Group Sparse Reconstruction and Total Variation Minimization for Target Imaging in Stratified Subsurface Media

2019

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Sparse reconstruction methods have been successfully applied for efficient radar imaging of targets embedded in stratified dielectric subsurface media. Recently, a total variation minimization (TVM) based approach was shown to provide superior image reconstruction performance over standard L1-norm minimization-based method, especially in case of non-point-like targets. Alternatively, group sparse reconstruction (GSR) schemes can also be employed to account for embedded target extent. In this paper, we provide qualitative and quantitative performance evaluations of TVM and GSR schemes for efficient and reliable target imaging in stratified subsurface media. Using numerical electromagnetic data of targets buried in the ground, we demonstrate that GSR and TVM provide comparable reconstruction performance qualitatively, with GSR exhibiting a slight superiority over TVM quantitatively, albeit at the expense of less flexibility in regularization parameters.

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A Hybrid Bistatic–Monostatic Radar Technique for Calibration-Free Estimation of Lossy Wall Parameters

Cited by 20 publications

References 15 publications

Three‐Dimensional Ground‐Penetrating Radar Imaging Through Multilayered Subsurface

Three‐Dimensional Ground‐Penetrating Radar Imaging Through Multilayered Subsurface

Two- and Three-Dimensional Fast Intrawall Imaging with Microwave Tomographic Algorithm

Performance Evaluation of Group Sparse Reconstruction and Total Variation Minimization for Target Imaging in Stratified Subsurface Media

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