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Robust correlation receiver for distance estimation

In English

Författare

Summary, in English

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

Publiceringsår

1994

Språk

Engelska

Sidor

596-603

Publikation/Tidskrift/Serie

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control

Volym

41

Issue

5

Dokumenttyp

Artikel i tidskrift

Förlag

IEEE - Institute of Electrical and Electronics Engineers Inc.

Ämne

  • Clinical Medicine
  • Medical Biotechnology

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0885-3010