Abstract:Traction spoofing is a highly covert type of spoofing interference that can induce the receiver to track spoofing signals without causing the tracking loop to lose lock. For scalar receivers, the tracking loops are independent of each other, so the traction spoofing for a single signal will not be affected by the signals of other channels. All tracking loops of vector receiver are coupled through receiver state and have mutual influence, which means that traction spoofing has different influence on vector and scalar tracking loops. Based on the assumption that there is no noise and the carrier frequency and carrier phase of the spoofing signal and the corresponding authentic signal are equal, this paper analyzes the influence of traction spoofing on the vector tracking loop, derives the success condition of spoofing, and verifies the analysis results by using the signal source simulator and software receiver. The results show that the conditions for successfully implementing traction spoofing on vector tracking loop are more stringent than those of scalar tracking loop, which reflects the inherent anti-spoofing capability of vector tracking loop.