1)School of Information Science and Technology, Xiamen University, Xiamen 361005 2)College of Marine Geo-science, Ocean University of China, Qingdao 266100
Abstract：In order to extract information including thin layer’s position and thickness, from reflected wave data of Ground Penetrating Radar (GPR) in multilayered situation, a spectral inversion algorithm realized in frequency domain is presented. Through analysis of electromagnetic wave propagation in multilayer media, generalized reflection coefficients are derived. After dividing the coefficients into pairs followed by decomposing the pairs into even and odd components, a cost function is established to connect reflection coefficients’ spectrum and \{layer’s\} parameters before inversion is carried out. Some simulations show that accurate inversion results can still be expected when thickness of the layer is less than tuning thickness, which therefore improves resolution of thin layers.
