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Title: UWB-TOA geolocation techniques in indoor environments
Authors: Rashid, A. Saeed
Sabira, Khatun
Borhanuddin, Mohd. Ali
Mohd. Khazani, Abdullah
Keywords: Indoor;Multipath;Ranging;Time-of-Arrival (ToA);Ultra-wideband (UWB)
Issue Date: Sep-2006
Publisher: The Institution of Engineers, Malaysia
Citation: The Journal of the Institution of Engineers, Malaysia, vol. 67(3), 2006, pages 13-17
Abstract: Ultra-wideband (UWB) radio is a new carrierless communication scheme using impulses and is a candidate technology for future communication and ranging applications. In this paper, we consider the problem of node localizing in ad-hoc networks, in which positioning algorithm only exploits the high precision ranging capabilities offered by UWB and does not rely on GPS. A Time-of-Arrival (ToA) based ranging scheme using UWB radio link is proposed. In this paper, the problem of ToA estimation in multipath channels, source of estimation error are discussed. Two-way ranging (TWR) scheme was used for network synchronisation. Results show that the accuracy enhancement depends on two principal factors: the strength of multipath components and the variance of non-line-of-sight (NLOS) delays, which it shows that DS-UWB is best suited for ranging, due to its larger bandwidth and its higher frequencies of operation.
Description: Link to publisher's homepage at http://www.myiem.org.my/
URI: http://myiem.org.my/content/iem_journal_2006-177.aspx
ISSN: 0126-513X
Appears in Collections:IEM Journal

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