Design, Architecutre And Validation Of A New Gnss Multi Constellation Simulator : Navys

With the multiplication of navigation systems (GPS, GALILEO, GLONASS, QZSS, ...) amd the large variety of signals to be received, GNSS constellation simulators need to be more and more flexible. In the scope of its navigation activities, the CNES has expressed the need for a simulator that satisfies a twofold objective: the test of a large variety of receivers and the amulation of a propagation channel representative of degraded environments, typically indoor or urban in order to assess purpose, Thales Alenia Space and Elta-SMP are currently developing a highly flexible and modular GNSS constellation simulator under CNES contract.In this development, they take benefit of their experience inherited from the realization of a flexible NSGU modulator that can handle a large diversity of modulations and can cope with most of the current and future GNSS systems. These modulations comprise BOC, BPSK, ALTBOC, CBOC, TMBOC, on selectable frequency bands.This paper describes the GNSS multi constellation simulator (NAVYS) design and architecture and includes preliminary validation test results.