Anti-spoofing and open GNSS signal authentication with signal authentication sequences

Global Navigation Satellite System (GNSS) signal authentication is a requirement for a number of applications. GNSS authentication has been proposed with aiding techniques that can be applied to the existing GPS and as a new security function for future GNSS. The paper proposes a concept of a new authentication scheme based on signal authentication sequences that can be integrated in GNSS. The method works on systems that provide an open and encrypted service on the same frequency. The scheme would require minimum impact to the system. The architecture is explained in the different components of ground, space and user segment. A simulation of the architecture has been implemented in Matlab and performances and test results are shown. The paper concludes with suggestions of optimal parameters for an hypothetical implementation, explaining the future research steps.