【摘要】 本文研究了机场道面钢筋加固区介质层电磁特性的反演问题。机场道面下钢筋的强反射回波严重影响道面介质层电磁特性的反演,为此本文将基于曲波变换的钢筋回波抑制技术引入到道面介质层电磁特性的反演算法中,即首先基于曲波变换进行钢筋回波抑制,而后基于改进的系统辨识算法实现钢筋加固区介质层电磁特性的反演。改进的系统辨识算法是在传统算法中的基础上,考虑了雷达发射信号带宽内的频率对道面介质层介电常数虚部的影响,从而进一步实现了介质层介电常数与电导率的同时反演。仿真结果证明了本文算法的有效性。更多还原

【Abstract】 The Electromagnetic(EM) property inversion of rebar-reinforced zone in runways is studied in this paper.The strong rebar echo will severely affect the EM inversion of the media layer in runways.So the rebar suppression technique based on the Hyp-curvelet is introduced to the EM inversion algorithm.Firstly,the Hyp-curvelet is used to suppress the rebar echoes,and then EM properties are estimated based on the improved system identification,in which the effect of the frequency components within the band width on the imaginary part of the permittivity is considered.Therefore the conductivity and permittivity of the media layer can be intensively obtained.The simulation results demonstrate the validity of the method proposed in this paper.更多还原