Super-resolution of 3-d GPR signals to estimate thin asphalt overlay thickness using the XCMP method

Shan Zhao, Imad L. Al-Qadi

Research output: Contribution to journalArticlepeer-review


The extended common midpoint (XCMP) method can be used on multichannel 3-D ground-penetrating radar (GPR) to estimate the asphalt pavement thickness and dielectric constant without the need for calibration by taking cores. The XCMP method requires accurate time delay determination of pavement reflection. However, for thin asphalt overlay, the range resolution of 3-D GPR signal is insufficient to resolve the overlapped pulses of asphalt concrete (AC). The objective of this paper is to use multiple signal classification (MUSIC) algorithm to increase the resolution of 3-D GPR signals, such that thin asphalt overlay thickness can be accurately estimated. An evaluation of the MUSIC algorithm at a full-scale test section and a comparison with regularized deconvolution algorithm showed the MUSIC algorithm is an effective approach for increasing the 3-D GPR signal range resolution when the XCMP method is applied on thin AC overlay.

Original languageEnglish (US)
Article number8445691
Pages (from-to)893-901
Number of pages9
JournalIEEE Transactions on Geoscience and Remote Sensing
Issue number2
StatePublished - Feb 2019


  • 3-D ground-penetrating radar (GPR)
  • extended common midpoint (XCMP)
  • super-resolution
  • thin asphalt overlay

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • General Earth and Planetary Sciences


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