Detection and mitigation of non-authentic GNSS signals: Preliminary sensitivity analysis of receiver tracking loops

A myriad of applications are based on the positioning and timing information provided by GNSS systems. Protecting the system against any kind of interference has been always on the focus of researchers and manufacturers. Unintentional and intentional interferences are two well known ways to mislead the results of GNSS receivers. However, it has been recently, with the mass-market production of Software Defined Radio (SDR) equipment and cheap hardware signal generators, when retransmission of delayed signal replicas or the generation of a modified version becomes even more feasible. For this reason, this paper attempts to perform an initial sensitivity assessment of the receiver tracking stage against this singular kind of disturbance. This analysis is critical for the development of appropriate techniques to detect and mitigate the effects of non-authentic signals reception.