牵引式欺骗对矢量跟踪环路的影响

Influence of traction spoofing on vector tracking loop

摘要:

牵引式欺骗能够在不引起跟踪环路失锁的条件下诱使接收机跟踪欺骗信号，是一种隐蔽性很高的欺骗干扰方式。对于标量接收机，由于其跟踪环路相互独立，因此针对单个信号进行牵引式欺骗时，不会受其他信号的影响。而矢量接收机的跟踪环路通过接收机状态耦合，存在相互影响，即牵引式欺骗对矢量和标量跟踪环路的影响存在差异。本文基于无噪声且欺骗信号与真实信号载波频率和载波相位相等的假设条件，分析牵引式欺骗对矢量跟踪环路的影响，推导出欺骗成功条件，并利用信号源模拟器和软件接收机对分析结果进行验证。研究结果表明，对矢量跟踪环路成功实施牵引式欺骗的条件较标量跟踪环路更为严苛，反映出矢量跟踪环路固有的抗欺骗干扰能力。

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.