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UWB Positioning Systsem Design: Selection of Modulation and Multiple Access Schemes

Published online by Cambridge University Press:  10 December 2007

Hui Yu ,
Enrique Aguado ,
Gary Brodin ,
John Cooper ,
David Walsh  and
Hal Strangeways
Hui Yu*
Affiliation:
(University of Leeds)
Enrique Aguado
Affiliation:
(University of Leeds)
Gary Brodin
Affiliation:
(University of Leeds)
John Cooper
Affiliation:
(University of Leeds)
David Walsh
Affiliation:
(University of Leeds)
Hal Strangeways
Affiliation:
(University of Leeds)
*
(Email: eenhy@leeds.ac.uk)
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Abstract

In densely-populated cities or indoor environments, limited visibility to satellites and severe multipath effects significantly affect the accuracy and reliability of satellite-based positioning systems. To meet the needs of “seamless navigation” in these challenging environments an advanced terrestrial positioning system is under development. This system is based upon Ultra-Wideband (UWB) technology, which is a promising candidate for this application due to good time domain resolution and immunity to multipath. This paper presents a detailed analysis of two key aspects of the UWB signal design that will allow it to be used as the basis of such a high performance positioning system: the modulation scheme and the multiple access technique. These two aspects are evaluated in terms of spectral efficiency and synchronisation performance over multipath channels. Thus this paper identifies optimal modulation and multiple access techniques for a long range, high performance terrestrial positioning system using UWB.

Keywords

Terrestrial positioning systemUWB
Type
Research Article
Information
The Journal of Navigation , Volume 61 , Issue 1 , January 2008 , pp. 45 - 62
Copyright
Copyright © The Royal Institute of Navigation 2007

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