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An Interpolation-Free and Fitting-Less Sub-sample Time-Delay Estimation Algorithm

  • C. A. Teixeira
  • M. Graça Ruano
  • W. C. A. Pereira
Part of the IFMBE Proceedings book series (IFMBE, volume 42)

Abstract

In this paper we propose a new algorithm for sub-sample time-delay estimation between two discrete-time signals. The new algorithm operates just over the discrete-time signals without the need for interpolation or fitting. The proposed method is compared with a method based on spline fitting, and that is referred to outperform other methods over a broader set of conditions (Viola&Walker, 2005). The new approach, besides presenting a low computational cost (70% less), seemed to outperforms the spline approach in situations of high noise levels (typically signal-to noise ratios smaller than 20dB).

Keywords

Sub-sample time-delay estimation Non-invasive temperature estimation Utrasound 

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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • C. A. Teixeira
    • 1
  • M. Graça Ruano
    • 1
    • 2
  • W. C. A. Pereira
    • 3
  1. 1.Centre for Informatics and Systems, Faculty of Sciences and TechnologyUniversity of CoimbraCoimbraPortugal
  2. 2.Faculty of Sciences and TechnologyUniversity of AlgarveFaroPortugal
  3. 3.Biomedical Engineering Program - COPPEFederal University of Rio de Janeiro-UFRJRio de JaneiroBrazil

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