Research on Thin-layer Recognition Technique Based on the Spectrum Inversion Method of Ground Penetrating Radar
Qin Yao①② Chen Jie① Fang Guang-you① Yin He-jun③
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ②(Graduate University, Chinese Academy of Sciences, Beijing 100039, China) ③(Chinese Academy of Sciences, Beijing 100864, China)
Abstract：Two parameters are normally employed to evaluate recognition ability of the Ground Penetrating Radar (GPR) for the thin-layer: the least recognition thickness and the reflectance recognition precision. In this paper, the spectrum inversion method is used to improve the recognition ability of the GPR. The spectrum transmission function of the multilayer media is firstly deduced, and the forward model of the reflecting wave spectrum is obtained. Then the two parameters are inversed by using the damp least-squares algorithm. The experiment demonstrates that the method can identify the layer effectively with a thickness less then one-eighth wavelength.
2010, Vol. 32 
