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A Robust Correlation Receiver for Distance Estimation
Responsible organisation
1994 (English)In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, ISSN 0885-3010, E-ISSN 1525-8955, Vol. 41, no 5, p. 596-603Article in journal (Refereed) Published
Abstract [en]

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 in [12]. 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
New York: IEEE , 1994. Vol. 41, no 5, p. 596-603
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-9440Local ID: oai:bth.se:forskinfoE337F9C65B182CB6C12568A3002CAA1COAI: oai:DiVA.org:bth-9440DiVA: diva2:837287
Available from: 2012-09-18 Created: 2000-03-15 Last updated: 2017-12-04Bibliographically approved

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