Road surface layers geometric parameters estimation by GPR using ESPRIT method
Résumé
In civil engineering, ground penetrating radar is widely used to assess theroadway structures. This paper evaluates the influence of interface roughness(surface and interlayer). A modified ESPRIT algorithm is proposed with aspectral smoothing technique for efficiently estimating the time delay, thepermittivity of the layers and the interface roughness. In order to reduce theimpact of noise, a preprocessing method called propagator is used to estimatethe noise variance. The algorithm is tested on simulated data obtainedby the rigorous numerical method called PILE (propagation inside layer expansion).Numerical simulations are conducted to assess the performance ofthe algorithm. The simulation results show that the proposed algorithm can estimate road parameters with small relative root mean square error.