Contrast Source Inversion for Objects Buried into Multi-Layered Media for Subsurface Imaging Applications

Complex Permittivity Imaging by Incorporating Synthetic Aperture Radar and Inverse Scattering Method for Stratified Ground Medium

“…Step 1): The dielectric profile of the background media, e.g., multi-layered media, is obtained by a prior knowledge or other estimation method, like [26]. And this contrast function is defined as χ bg ≡ (χ 1 , ..., χ n , ..., χ N layer ).…”

“…In contrast, the CSI [18]- [20] has been widely used in many applications, including the GPR model [21]- [25], due to its cost effective inversion scheme that optimizes the total field in the region of interest (ROI) without recursive calculation of the forward problem. Building on the CSI feature, we have proposed the CSI-based permittivity extraction for multi-layered media [26], where the CSI cost function evaluates the possible combination of relative permittivity. Another notable CSI feature is that it provides both a contrast function (dielectric profile as primary variables) and a total field in the ROI (secondary variables), enabling the determination of the Green's function for the assumed heterogeneous background media.…”

Layered media parameters inversion algorithm based on adaptive sparse decomposition

“…Hence, how to achieve the inversion results for multi-layered medium efficiently and accurately becomes a research focus in ground penetrating radar. The layered media parameters has been inverted both in time domain and frequency domain [1][2] .…”