Research of a Low Complexity Spoofing Mitigation Method Based on a Moving Antenna

Spoofing to GNSS receivers becomes to a majority threat to satellite navigations systems in civil safety critical applications. By weighing the groups of samples from a single moving antenna precisely, an equivalent adaptive beam forming antenna array is synthesized. Corresponding to the scenario that all spoofing pseudo random noise (PRN) codes are transmitted from the same source in space, the different spatial signatures of spoofing and authentic signals are analyzed. With a low complexity weighing parameters calculations algorithm, a null is steered in the direction where spoofing signals come from. This is an effective spoofing mitigation method which greatly suppresses the energy of spoofing signals in the conventional GNSS receiver procedures. And simulation results are given in the end to the valid the performance of the proposed method.