Estimation of time delay and interface roughness by GPR using modified MUSIC

Meng Sun (1) , Cédric Le Bastard (1, 2) , Nicolas Pinel (3) , Yide Wang (1) , Jianzhong Li (4, 1) , Jingjing Pan (1) , Zhiwen Yu (4)

1 IETR - Institut d'Électronique et des Technologies du numéRique
2 Cerema Equipe-projet ENDSUM - Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Equipe-projet ENDSUM
3 ALYOTECH
4 Guangzhou University

In civil engineering, roadway structure evaluation is an important application which can be carried out by ground penetrating radar. In this paper, firstly a signal model taking into account the influence of interfaces roughness (surface and interlayer) is proposed. In order to estimate the time delay and interface roughness, we propose a method composed of 2 steps: 1) a modified MUSIC algorithm is proposed for time delay estimation; 2) the interface roughness is estimated by using Maximum Likelihood method (MLE) with the estimated time delays. The proposed algorithms are tested on data obtained by a method of moments (MoM). Numerical examples are provided to demonstrate the performance of the proposed algorithm.

Keywords: Ground Penetrating Radar (GPR); Time-Delay Estimation (TDE); Roughness; Modified MUSIC; Method of Moments (MoM); Maximum Likelihood method (MLE)

Domains: Engineering Sciences [physics]; Signal and Image processing

Meng Sun, Cédric Le Bastard, Nicolas Pinel, Yide Wang, Jianzhong Li, et al.. Estimation of time delay and interface roughness by GPR using modified MUSIC. Signal Processing, 2017, 132, pp.272 - 283. ⟨10.1016/j.sigpro.2016.05.029⟩. ⟨hal-01400510⟩