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Code Multipath Modelling in the Urban Environment Using Large Virtual Reality City Models: Determining the Local Environment

Published online by Cambridge University Press:  15 December 2006

J. Bradbury ,
M. Ziebart ,
P.A. Cross ,
P. Boulton  and
A. Read
J. Bradbury
Affiliation:
(University College London) (Email: [email protected])
M. Ziebart
Affiliation:
(University College London) (Email: [email protected])
P.A. Cross
Affiliation:
(University College London) (Email: [email protected])
P. Boulton
Affiliation:
(Spirent Communications)
A. Read
Affiliation:
(Spirent Communications)
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Abstract

Positioning in the urban environment using GNSS is hampered by poor satellite availability due to signal obstruction created by both man-made and natural features of the urban environment. In addition, range measurement to satellites for positioning and for navigation is severely degraded by the multipath effect. The arrival and continuous enhancement of computerised geometric city models makes it possible to tackle these problems through modelling. In this paper description is given of a method for determining the local multipath environment, defined by the surfaces within a city model that will cause disruptive signal reflections to be presented to a receiver. An example simulation is performed, and graphical and numerical results are produced.

Keywords

GNSSMultipathUrban positioning
Type
Research Article
Information
The Journal of Navigation , Volume 60 , Issue 1 , January 2007 , pp. 95 - 105
Copyright
© 2007 The Royal Institute of Navigation

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