SNSS - Simulated Navigation Satellite System; Simulating a Generic GNSS Receiver in Virtual Environments

Jón Ólafur Winkel, Bernd Eissfeller, G. Hein

Abstract:	In order to estimate the influence of a change in one component of the GNSS (e.g. a different carrier frequency or narrow correlating in a receiver) it is necessary to model the whole system (satellite constellation, signal transmission, receiver, environment etc.), not just parts of it. In view of future GNSS's (e.g. ENSS, GNSS-2), their design and development, it is very important to estimate their performance, before they are built. When designing a receiver for an existing GNSS (GPS and/or GLONASS), it may also be helpful to “try it out” in a simulation before any hardware is implemented. Thus an end-to-end simulation of a generic GNSS is of great importance for existing and future GNSS's. SNSS is a software tool for simulating GNSS systems (satellite orbits, signal structure etc.) with the corresponding receiver (user segment) in a virtual environment (buildings). SNSS is based on the Purpos software (Eissfeller & Winkel, 1996). The main components of SNSS are · Satellite orbit generator and editor · Environment and way point editors · Reflection model · Ray-tracer for geometric multipath analysis · Receiver · Position processor In this paper we present results from our simulations done with various GNSS Systems: GPS and a hypothetical GNSS-2 constellation with three different pulse-shaping schemes. This is done for different receiver characteristics, in several virtual urban areas.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	1675 - 1684
Cite this article:	Winkel, Jón Ólafur, Eissfeller, Bernd, Hein, G., "SNSS - Simulated Navigation Satellite System; Simulating a Generic GNSS Receiver in Virtual Environments," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 1675-1684.
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