采用双天线载波相位差技术的卫星导航接收机抗欺骗方法

针对欺骗干扰信号难以有效实时模拟真实卫星信号空间分布特性的特点，提出利用双天线载波相位差进行欺骗信号检测的方法。分析载波相位差计算的各种误差源，并在此基础上建立针对欺骗信号的二元假设检验。通过理论分析和仿真实验，验证了所提欺骗信号检测技术的有效性，并得出了天线阵基线越长、入射方位角越小，载波相位差检测技术对欺骗信号的检测性能越优的结论。
For the fact that the spoofer has no way to simulate the space distribution characteristic of the authentic GNSS（global navigation satellite system） signals, a detection technique based on carry phase difference was proposed. All errors of the detection were analyzed, and the multiple hypotheses testing the spoofing detection were built. Through theoretical analysis and simulation tests, the proposed spoofing detection method is verified. Results show that the longer the baseline of the array is, the smaller angle of incidence is, which leads to a better spoofing detection performance of the proposed method.