Interoperability Study Between GPS and Galileo Signals

S. Ganguly, A. Jovancevic

Abstract:	Galileo signals will be occupying the same frequency spectrum as GPS. Even though both signals are designed to be resistant to interference, the interoperability between these signals is necessary to assess and evaluate. Since Galileo signals as well as new military GPS signal are not going to be available for several more years, the only way to evaluate their coexistence is through a simulation. Center for Remote Sensing has developed signal generators for all Galileo and GPS signals using a software toolset. This toolset allows for high fidelity signal generation under various scenarios. Based on the information available about the current state of Galileo signal structure, we have developed receiver systems for Galileo signals to evaluate their performance under different signal conditions and for difference user dynamics. The interoperability study between the current and future GPS signals with those of Galileo involves assessing various aspects of receiver operation. This paper presents the analysis of the mutual interference between signals, issues regarding the front-end bandwidth and tracking loop and pseudorange measurement degradation. The software toolset allows these issues to be analyzed accurately and efficiently. We present the results of these analyses describing the effects of difference proposed Galileo signals on GPS and vice-versa.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	1023 - 1034
Cite this article:	Ganguly, S., Jovancevic, A., "Interoperability Study Between GPS and Galileo Signals," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 1023-1034.
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