A perceived emerging threat to GNSS receivers is posed by a spoofing transmitter that emulates authentic signals but with randomized\r\ncode phase and Doppler over a small range. Such spoofing signals can result in large navigational solution errors that are\r\npassed onto the unsuspecting user with potentially dire consequences. In this paper, a simple and readily implementable processing\r\nrule based on CNR estimates of the correlation peaks of the despread GNSS signals is developed expressly for reducing the\r\neffectiveness of such a spoofer threat. Consequently, a comprehensive statistical analysis is given to evaluate the effectiveness of the\r\nproposed technique in various LOS and NLOS environments. It is demonstrated that the proposed receiver processing is highly\r\neffective in both line-of-sight and multipath propagation conditions.
Loading....