MMSE estimation of arrival time with application to ultrasonic signals
1993 (English)Report (Other academic)
This paper deals with arrival time estimation of a narrow-band signal disturbed by white gaussian noise. In order to estimate the distance between a transmitting source and a reflecting target an estimator, based on the criterion of minimum mean square error (MMSE), is investigated. The MMSE-estimator is implemented in an experimental ultrasound pulse-echo system, and results of comparative simulations between the MAP-estimator and the MMSE-estimator are given. The results are compared to the theoretical Weiss-Weinstein lower bound. As expected, the MMSE-estimator has smaller mean square error than the MAP-estimator. For high SNRs, however, the mean square error obtained by the MAP-estimator manages to approach that of the MMSE-estimator. Other di®erences between the two estimators are revealed in additional experiments in which the range estimates are used to generate 3-dimensional surface pictures.
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1993. , 15 p.
Research report / Luleå University of Technology1 jan 1974 → 31 dec 1996, ISSN 0347-0881 ; 1993:15
Research subject Signal Processing
IdentifiersURN: urn:nbn:se:ltu:diva-25249Local ID: e61a51a0-df04-11dc-99e3-000ea68e967bOAI: oai:DiVA.org:ltu-25249DiVA: diva2:998301
Godkänd; 1993; 20080219 (ysko)2016-09-292016-09-29Bibliographically approved