Lazaro Antonio, Porcel Arnau, Lazaro Marc, Villarino Ramon, Girbau David
Department of Electronics, Electrics and Automatic Control Engineering, Rovira i Virgili University, 43007 Tarragona, Spain.
Sensors (Basel). 2022 Mar 10;22(6):2145. doi: 10.3390/s22062145.
This work studies the feasibility of using backscatter-modulated tags to introduce false information into a signal received by a frequency-modulated continuous-wave (FMCW) radar. A proof-of-concept spoofing device was designed in the 24 GHz ISM band. The spoofing device was based on an amplifier connected between two antennas, and modulation was carried out by switching the amplifier bias. The use of an amplifier allowed us to increase the level of spoofing signal compared with other modulated backscattering methods. The simulated and experimental results show that our method has the ability to generate a pair of false targets at different ranges and velocities depending on the modulation frequency of the chosen tag, since sidebands appear due to this modulation. Countermeasures to detect the spoofing attack based on changes in the slope of the frequency sweep between frames are also proposed.
这项工作研究了使用反向散射调制标签将虚假信息引入调频连续波（FMCW）雷达接收到的信号中的可行性。在24GHz工业、科学和医疗（ISM）频段设计了一个概念验证欺骗装置。该欺骗装置基于连接在两个天线之间的放大器，通过切换放大器偏置进行调制。与其他调制反向散射方法相比，使用放大器使我们能够提高欺骗信号的电平。仿真和实验结果表明，我们的方法能够根据所选标签的调制频率在不同距离和速度下生成一对虚假目标，因为这种调制会产生边带。还提出了基于帧间扫频斜率变化来检测欺骗攻击的对策。
