On signal structures for GNSS-2

Abstract

This paper summarizes the main results of an early investigation on desirable signal structures for the European Galileo civil satellite navigation system. Stemming from the requirements for increased accuracy, reduced time-to-first-fix and integrity information provision, the report describes the logical steps and the related numerical results leading to a novel Galileo signal definition. Although the final parameter definition is largely based on European system constraints, a number of design guidelines like the use of spectrally efficient square-root raised-cosine chip shaping and enhanced data broadcasting are expected to be of general applicability to any future satellite navigation system.