A New GNSS Spoofing Detection Method Using Two Antennas

The security of global navigation satellite system (GNSS) has attracted a lot of attention recently. The spoofing detection method using multi-antenna array is one of the most efficient spoofing detection methods due to its unique geometry space. However, it is either based on the assumption that all spoofing signals come from the same direction or it requires additional inertial measurement unit (IMU) or multi-antenna attitude solution to obtain attitude information. In this paper, we propose a new GNSS spoofing detection method using only two off-the-shelf antennas. This method can detect a single spoofing signal or spoofing signals from multiple directions, and does not require any attitude information. This method employs the carrier phase and the known baseline length to estimate the baseline vector. Its theoretical performance can be assessed by the sum of squared error (
SSE
) test statistic. Static and dynamic experiments both prove that this method can distinguish the spoofing signal from the real signal effectively without any delay.