GNSS Spoofing Detection Using Q Channel Energy

Abstract

Spoofing interference poses a significant challenge to the Global Navigation Satellite System (GNSS). To effectively combat intermediate spoofing signals, this paper presents an enhanced spoofing detection method based on abnormal energy of the quadrature (Q) channel correlators. The detailed principle of this detection method is introduced based on the received signal model under spoofing attack. The normalization parameter used in this method was the estimation of the noise floor. The performance of the proposed Q energy detector is validated through simulations, the Texas Spoofing Test Battery dataset and field tests. The results demonstrate that the proposed detector significantly enhances detection performance compared to signal quality monitoring methods, particularly in overpowered scenarios and dynamic scenarios. By increasing the detection probability in the presence of spoofing signals and decreasing the false alarm probability in the absence of spoofing signals, the proposed detector can better meet the requirements of practical applications.

Global Navigation Satellite System Spoofing Detection in Inertial Satellite Navigation Systems

“…For example, spoofing detection based on clock bias or drift monitoring is described in [15,16]. A fundamentally different method based on abnormal energy in quadrature (Q) channel correlators is proposed in [17]. To detect a spoofing attack, the method proposed in [18] analyzes single-antenna GNSS and additional sensor (inertial measurement unit and odometer) measurements independently during a pre-selected observation window and cross checks the solutions provided by the GNSS and inertial navigation solution (INS)/odometer mechanization.…”