A robust correlation receiver for distance estimation
1994 (English)In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, ISSN 0885-3010, E-ISSN 1525-8955, Vol. 41, no 5, 596-603 p.Article in journal (Refereed) Published
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
Place, publisher, year, edition, pages
1994. Vol. 41, no 5, 596-603 p.
Research subject Signal Processing
IdentifiersURN: urn:nbn:se:ltu:diva-3580DOI: 10.1109/58.308494Local ID: 1676d0f0-e124-11dc-9e29-000ea68e967bOAI: oai:DiVA.org:ltu-3580DiVA: diva2:976438
Godkänd; 1994; 20080222 (ysko)2016-09-292016-09-29Bibliographically approved