Analysis of Anti-Repeater-Spoofing Performance of GNSS Nulling Anti-Jamming Receiver

To analyze the anti-spoofing performance of the adaptive nulling anti-jamming satellite navigation receiver in response to direct meaconing attrack, this paper derives the theoretical formula for the power inversion (PI) algorithm used in nulling anti-jamming receiver to suppress real satellite signal and meaconing signal in the case of limited number of snapshots. Through the two indicators of signal absolute power and carrier to noise ratio, analyzes the impact of repeated signal input power on the suppression effect. It is found that the PI algorithm has good suppression effect on direct forwarding, making the receiver not spoofed. Finally, using the antenna array software receiver for simulation, the conclusion is validated according to the capture code phase and carrier-to-noise ratio.