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Robust correlation receiver for distance estimation

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Author

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

Publishing year

1994

Language

English

Pages

596-603

Publication/Series

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control

Volume

41

Issue

5

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Clinical Medicine
  • Medical Biotechnology

Status

Published

ISBN/ISSN/Other

  • ISSN: 0885-3010