NDLI: On Time-of-arrival Positioning in a Multipath Environment

Content Provider	IEEE Xplore Digital Library
Author	Yihong Qi Kobayashi, H. Suda, H.
Copyright Year	1967
Abstract	Wireless geolocation in a multipath environment is of particular interest for wideband communications and fast-developing ultrawideband (UWB) technologies. Conventional methods are solely based on first arriving signals. In this paper, it is investigated whether and under what conditions processing delay estimates of multipath components in addition to first arrivals can enhance the positioning accuracy. It is shown that the enhancement depends on two principal factors: strength of multipath components and variance of nonline-of-sight (NLOS) delays. Analytical results, which are derived as an extension of a single-path propagation case (IEEE Trans. Wireless Commun., Feb. 2006), are presented first. Their practical implications are then discussed by examining several numerical examples. Finally, modified schemes of practical interest in a multipath environment are proposed
Sponsorship	IEEE Vehicular Technology Society
Starting Page	1516
Ending Page	1526
Page Count	11
File Size	713232
File Format	PDF
ISSN	00189545
Volume Number	55
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delay estimation Maximum likelihood estimation Statistics Ultra wideband communication Ultra wideband technology Delay effects Mobile communication Communications technology Laboratories Research and development time-of-arrival (TOA) positioning Cramer–Rao lower bound (CRLB) generalized CRLB (G-CRLB) maximum a posteriori probability (MAP) estimation maximum-likelihood estimation (MLE) multipath
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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