Gao Yangjun, Li Guangyun
State Key Laboratory of Geo-Information Engineering, Xi'an 710054, China.
College of Geospatial Information, PLA Strategic Support Force Information Engineering University, Zhengzhou 450001, China.
Sensors (Basel). 2022 Aug 31;22(17):6588. doi: 10.3390/s22176588.
Satellite navigation spoofing technology has become a hotspot of interference technology research because of its significant threat and high concealment. In a spoofing scenario, suppressive interference is typically used to ensure that the target receiver sensor is in the unlocked and reacquisition state, and then spoofing is implemented. This method has a high feasibility, and the power of the spoofing signal affects the concealment and efficiency of spoofing. Currently, there is limited research involving the GNSS spoofing signal power control. Moreover, there is no systematic complete power control scheme, most of which is limited to qualitative or simulation, and the actual application effect is still unclear. Therefore, a new GNSS spoofing signal power control algorithm under the power constraints of the receiver sensor in the acquisition phase and the subsequent control is proposed. The experimental platform is designed to prove that compared with the conventional spoofing signal high power control algorithm, the new GNSS spoofing signal power control algorithm shortens Doppler frequency fluctuation time by 72.2% and reduces the range by 75.9%. The carrier-to-noise ratio of the received signal is less than the threshold of the receiver sensor, and the range of three-dimensional coordinates of Earth-Centered, Earth-Fixed (ECEF) is significantly reduced during the spoofing signal taking over receiver sensor, this shows that the new design of the GNSS spoofing signal power control algorithm can make spoofing behavior more hidden, and it will make it more difficult for the target receiver sensor to detect spoofing behavior. The designed algorithm can take over the receiver sensor stealthily with the help of suppressing interference and then pull the bias positioning results, which has good feasibility and effectiveness.
卫星导航欺骗技术因其重大威胁性和高隐蔽性，已成为干扰技术研究的热点。在欺骗场景中，通常利用压制干扰确保目标接收机传感器处于未锁定和重新捕获状态，然后实施欺骗。该方法具有较高的可行性，欺骗信号的功率会影响欺骗的隐蔽性和效率。目前，涉及全球导航卫星系统（GNSS）欺骗信号功率控制的研究有限。而且，不存在系统完整的功率控制方案，大多局限于定性分析或仿真，实际应用效果仍不明确。因此，提出了一种在捕获阶段接收机传感器功率约束及后续控制下的新型GNSS欺骗信号功率控制算法。设计了实验平台，结果证明，与传统欺骗信号高功率控制算法相比，新型GNSS欺骗信号功率控制算法使多普勒频率波动时间缩短了72.2%，距离减小了75.9%。接收信号的载噪比小于接收机传感器的阈值，在欺骗信号接管接收机传感器期间，地心地固（ECEF）三维坐标范围显著减小，这表明新型GNSS欺骗信号功率控制算法的设计可使欺骗行为更隐蔽，目标接收机传感器更难检测到欺骗行为。所设计的算法能够借助压制干扰悄悄接管接收机传感器，进而拉偏定位结果，具有良好的可行性和有效性
