A Study of Galileo Performance - GPS Interoperability and Discriminators for Urban and Indoor Environments

Matt O'Donnell, Trevor Watson, James Fisher, Steve Simpson, Gary Brodin, Ed Bryant and David Walsh

Abstract:	This paper describes an ongoing experimental study for UK BNSC to examine the case for mass-market appeal of Galileo. With a free GPS service increasingly being integrated into many consumer products to provide location information, Galileo must offer clear advantages to the users in order to make it worthwhile for manufacturers or value-added service providers to incorporate Galileo into their product or service as well as GPS. This study seeks to provide some technical underpinning to these potential Galileo discriminators and hence some “commercial input” for consideration in the signal design process. It is a given that increasing the number of satellites will result in more satellites in view of the user receiver at any one time. This in turn leads to increased accuracy with much improved availability. However, advances in signal design and signal processing also offer the prospect of improvements compared to existing GPS. These potential improvements include better multipath performance and better penetration through obstructions, resulting in improved urban and indoor operations. The study therefore examines three areas – availability improvements due to interoperability of GPS and Galileo constellations, signal performance simulation/optimisation in urban and indoor multipath environments, and market size/revenue projections for mass-market applications.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	2160 - 2172
Cite this article:	O'Donnell, Matt, Watson, Trevor, Fisher, James, Simpson, Steve, Brodin, Gary, Bryant, Ed, Walsh, David, "A Study of Galileo Performance - GPS Interoperability and Discriminators for Urban and Indoor Environments," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 2160-2172.
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