SCHENONE , Valentina

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Quantitative inversion of GPR data opens the door to precise characterization of underground environments. However, in order to make the inverse scattering problem solution easier from a computational viewpoint, simplifying assumptions are often applied, i.e., two-dimensional approximations or the consideration of idealized field probes and...

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Electromagnetic imaging of dielectric targets at microwave frequencies needs dealing with an inverse problem, whose solution process is further complicated by the unavoidable presence of model error. In this work, the adoption of a neural network based on long short-term memory cells is introduced for the compensation of such an issue. In...

A mild data-driven approach for microwave imaging is considered in this paper. In particular, the developed technique relies upon the use of a Newton-type inversion scheme in variable-exponent Lebesgue spaces, which has been modified by including a data-driven operator to enforce the available a-priori information about the class of targets to...

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The possibility of detecting faulty elements in steerable antenna arrays based on measurements of the radiated electromagnetic field has a key relevance in several scenarios. However, since the related inverse problem is affected by a severe ill-posedness, the development of specific algorithms is required for its solution. In this...

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The development of microwave-based inverse scattering techniques to inspect bodies and structures in a noninvasive way has inspired numerous applications [1] , [2] , which range from biomedical diagnostics to industrial settings and geophysics [3]. In all these promising fields, a successful implementation of microwave inverse scattering...

Mismatch between measurements and model used inside the inversion scheme represent a critical point in subsurface electromagnetic imaging. In this paper, a timedomain strategy based on the use of long short-term memory cells is proposed. The approach is assessed through a set of simulations where a couple of antennas are used to...

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An approach for antenna array diagnostics is presented in this paper. The developed procedure is based on the solution of the underlying inverse problem by means of a Lebesgue-space inversion technique, which has been found to be quite effective in retrieving small and isolated defects without the need of strictly enforcing sparsity...

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A hybrid inversion procedure for subsoil prospecting by ground penetrating radar (GPR) measurements is proposed and experimentally validated in this letter. The approach integrates the benefits of qualitative beamforming in an adaptive multifrequency inexact-Newton scheme formulated in Lebesgue spaces with variable exponents. After a first...

In the present paper, a hybrid electromagnetic imaging method for subsurface prospection is presented. The approach is based on the cascade of two blocks: a time-domain qualitative reconstruction algorithm followed by a multifrequency quantitative inverse-scattering technique. In the first phase, the scattered-field data estimated by adaptive...

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Nowadays, antenna arrays are important tools adopted in a great number of applications including radar, mobile and satellite communication systems, and electromagnetic imaging. Moreover, in these applications, arrays with a high number of elements are ever more requested, which results in a growing possibility of damages in the array. The...

In this paper, a subsurface imaging configuration is considered, with the goal of retrieving the quantitative dielectric properties of buried targets from scattered electric field measurements performed by a set of antennas above the soil. The acquired scattered-field data are processed by a nonlinear inverse-scattering approach in...

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In this paper, a novel antenna array diagnostic approach is presented. The failures in antenna arrays are detected by means of a non-Hilbertian Lebesgue-space L-p technique to solve the underlying inverse problem. The solution of this inverse problem enables to retrieve the distribution of faulty feed excitations of the antenna under test...

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