Requirements on the Galileo Signal Structure

B. Eissfeller, G.W. Hein, J. Winkel and P.H. Hartl

Abstract:	In the paper fundamental signal requirements for this type of code and carrier phase tracking users are formulated and a critical review of the currently discussed signal structures in GPS IIF and GALILEO is done to the degree possible. It is tried to give answers to the following ques- tions, focusing on user equipment and user algorithms: Carrier frequency in L - band versus other bands, mini- mum required bandwidth and code chipping rate neces- sary, selection of good spreading codes with low cross correlation properties but good acquisition performance, necessary carrier-to-noise ratio to allow precise code and carrier phase tracking, fast acquisition and high jamming resistance, low multipath and thermal noise errors and the potential to implement multipath mitigation on code and carrier phase, multiple carrier system with sufficient spac- ing to eliminate ionosphere and the potential to allow ro- bust and fast ambiguity fixing and maximum allowed navigation data rate to prevent squaring loss. Especially it is tried to make a trade-off between rectangular, pulse shaped and split-spectrum signals with respect to low-cost implementation in a GNSS receiver. The current state of GPS receiver technology is briefly presented as being a reference to assess the additional effort on hardware and software level to implement new signal structures, which are now under discussion.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	1772 - 1781
Cite this article:	Eissfeller, B., Hein, G.W., Winkel, J., Hartl, P.H., "Requirements on the Galileo Signal Structure," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 1772-1781.
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