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Toward a unified PNT, Part 2: Ambiguity and environmental data: Two further key challenges of multisensor positioning

Groves, PD; Wang, L; Walter, D; Jiang, Z; (2014) Toward a unified PNT, Part 2: Ambiguity and environmental data: Two further key challenges of multisensor positioning. GPS World , 25 (11) pp. 18-35. Green open access

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Abstract

The coming requirements of greater accuracy and reliability in a range of challenging environments for a multitude of missioncritical applications require a multisensor approach and an over-arching methodology that does not yet exist. The likelihood depends on both the positioning method and the context, both environmental and behavioral. Urban and indoor positioning techniques that do not require dedicated infrastructure are particularly vulnerable to ambiguity. Even where a signal of opportunity is identifiable, the transmission site may change without warning. For example, Wi-Fi access points are sometimes moved and mobile phone networks are periodically refigured. Thus, there is a risk of false landmark identification. The pattern-matching positioning method maintains a database of measurable parameters that vary with position. Examples include terrain height, magnetic field variations, Wi-Fi signal strengths, and GNSS signal availability information.

Type: Article
Title: Toward a unified PNT, Part 2: Ambiguity and environmental data: Two further key challenges of multisensor positioning
Open access status: An open access version is available from UCL Discovery
Publisher version: http://gpsworld.com/
Language: English
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1470200
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