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Robust correlation receiver for distance estimation

Författare:
Publiceringsår: 1994
Språk: Engelska
Sidor: 596-603
Publikation/Tidskrift/Serie: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Volym: 41
Nummer: 5
Dokumenttyp: Artikel i tidskrift
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.

Sammanfattning

Many methods for distance estimation, such as the ultrasonic pulse-echo method, involve the estimation of a time-of-flight (TOF). In this paper, a signal model is developed that, apart from the TOF, accounts for an unknown, linear frequency dependent distortion as well as for additive noise. We derive a TOF estimator for this model based on the criteria of maximum likelihood. The resulting receiver can be seen as an extension or generalization of the well known cross-correlation, or “matched filter”, estimator described, e.g., by Nilsson. The novel receiver is found to be more robust against unknown pulse shape distortion than the cross-correlation estimator, giving less biased TOF estimates. Also, bias versus noise sensitivity can be controlled by proper model order selection

Nyckelord

  • Clinical Medicine
  • Medical Biotechnology

Övriga

Published
  • ISSN: 0885-3010

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