Robust correlation receiver for distance estimation
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
Full text
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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