Comparative analysis of UWB deconvolution and feature extraction algorithms for GPR landmine detection

Timofei G. Savelyev, Motoyuki Sato

Research output: Contribution to journalConference articlepeer-review

15 Citations (Scopus)

Abstract

In this work we developed target recognition algorithms for landmine detection with ultra-wideband ground penetrating radar (UWB GPR). Due to non-stationarity of UWB signals their processing requires advanced techniques, namely regularized deconvolution, time-frequency or time-scale analysis. We use deconvolution to remove GPR and soil characteristics from the received signals. An efficient algorithm of deconvolution, based on a regularized Wiener inverse filter with wavelet noise level estimation, has been developed. Criteria of efficiency were stability of the signal after deconvolution, difference between the received signal and the convolved back signal, and computational speed. The novelty of the algorithm is noise level estimation with wavelet decomposition, which defines the noise level separately for any signal, independently of its statistics. The algorithm was compared with an iterative time-domain deconvolution algorithm based on regularization. For target recognition we apply singular value decomposition (SVD) to a time-frequency signal distribution. Here we compare the Wigner transform and continuous wavelet transform (CWT) for discriminant feature selection. The developed algorithms have been checked on the data acquired with a stepped-frequency GPR.

Original languageEnglish
Pages (from-to)1008-1015
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5415
Issue numberPART 2
DOIs
Publication statusPublished - 2004 Dec 20
EventDetection and Remediation Technologies for Mines and Minelike Targets IX - Orlando, FL, United States
Duration: 2004 Apr 122004 Apr 16

Keywords

  • CWT
  • Deconvolution
  • Regularization
  • SVD
  • Wavelets
  • Wigner distribution

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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