Time-Frequency interfering detector for GNSS receivers

The extreme weakness of a Global Navigation Satellite System (GNSS) signal makes it vulnerable to almost every kind of interfering signals. Time-frequency analysis has proved to be an effective solution for the identification of almost every kind of interference present in the GNSS signal. However its high complexity has limited the diffusion of such techniques for GNSS applications. Since the first block of a GNSS receiver, the acquisition stage, implicitly performs a sort of time-frequency analysis it is sufficient to introduce a slight modification of the basic acquisition scheme to enable a fast and efficient time-frequency analysis for interference detection. This paper is devoted to the description of this scheme and presents some simulation results.