Measurements and Modeling of the Satellite-to-Indoor Channel for Galileo

F. Pérez-Fontán, B. Sanmartín, A. Steingass, A. Lehner, J.Selva, E. Kubista, and B. Arbesser-Rastburg

Abstract:	In this paper measurements and modeling results obtained in the course of an European Space Agency, ESA, project (2002-2003) entitled "Navigation signal measurement campaign for critical environments", carried out by JOANNEUM RESEARCH (Austria) with subcontracts to DLR (Germany) and the University of Vigo (Spain), are presented. During the project, measurements were performed using a high resolution channel sounder on board a helicopter, the objective being the characterization of the satellite-toindoor channel at frequencies close to those assigned to the future Galileo navigation system. The helicopter was flown around a building where a receiver was located. Different flights were carried out to cover several elevation angles. The receiver was also placed in different locations at different floors within the building so that different penetration conditions could be studied: close to the external walls, corridors, inner rooms, et. al.. Typical measured power-delay profiles, PDPs, are presented and analyzed. In addition, the dynamics of the channel were also studied and characterized. To complement the study, a modeling activity was carried out in two directions. For one, the measured environments were studied using a deterministic, ray-tracing based propagation tool to gain further insight on the propagation phenomena. In a second step, a statistical channel model was derived from the measurements. The statistical model reflects the different time-spreading conditions found in the measurements, which are mainly caused by reflections and diffractions within the building itself and those produced by reflections/diffractions on external buildings. The statistical model also addresses how the arriving contributions reach the receiver in groups or clusters of rays.
Published in:	Proceedings of the 2004 National Technical Meeting of The Institute of Navigation January 26 - 28, 2004 The Catamaran Resort Hotel San Diego, CA
Pages:	190 - 202
Cite this article:	Pérez-Fontán, F., Sanmartín, B., Steingass, A., Lehner, A., J.Selva,, Kubista, E., Arbesser-Rastburg, B., "Measurements and Modeling of the Satellite-to-Indoor Channel for Galileo," Proceedings of the 2004 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2004, pp. 190-202.
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