多方位测量的相位双差 GNSS 欺骗干扰检测算法

摘要

Carrier phase double difference GNSS spoofing detection technique is an effective one of those methods based on phase measurement,but the high false alarm probability problem is caused by angle ambiguity for double-element antenna-array.Therefore,a technique based on antenna-array direction change was presented.The carrier phase double differences were estimated in different antenna-array directions, and then the carrier phase double differences were used to discriminate the spoofing signals.In this way,the angle ambiguity can be eliminated, and the false alarm probability was reduced.Simulation results verified the effectiveness of the proposed spoofing detection technique.%对于二元天线阵，相位双差检测算法的载波相位双差角度模糊、虚警概率较高，这限制了算法的应用。针对这一问题，提出天线阵方位变化的欺骗干扰检测算法。通过二元天线阵在不同方位估计信号的载波相位双差，进行多次判决，有效消除角度模糊，降低检测的虚警概率，实现二元天线的载波相位双差检测。建立仿真模型，并通过仿真计算分析验证了该方法的有效性。