惯导辅助的三元天线阵欺骗干扰检测算法

对欺骗信号的到达角检测是目前最有效的欺骗检测方法之一,常用的到达角检测又分为载波相位单差和载波相位双差检测。载波相位单差检测技术不能应用于运动载体,载波相位双差技术对多阵元发射的欺骗信号或单路欺骗信号失效。针对该问题,提出一种惯导辅助的三元天线阵欺骗干扰检测技术,该算法主要应用于车辆运动载体,运动载体只需在某一时间段内运动一段距离即可利用该算法进行欺骗干扰检测。该算法对多阵元发射的欺骗信号或单路欺骗信号都同样有效。通过理论分析和仿真实验验证了所提方法的有效性,并得出天线阵基线长度越长,运动位移越大、欺骗源距离接收天线越近,信号入射方向与天线位移方向夹角越接近90°,该方法检测性能越优的结论。

Detection of Spoofing Threats by Inertial Assisted Three Elements Antenna

In particular, direction-of-arrival (DOA) discrimination, is one of the most effective detection methods. It has two forms, which are carrier phase single difference and carrier phase double difference. The carrier phase single difference cannot be used in the motion vector, and the carrier phase double difference will fail to detect single spoofing signal or the spoofing transmitters which transmit several spoofing signals from multiple antennas. In order to suppress this problem, a method based on the inertial assisted three elements antenna is introduced. It is applied to motion vectors, the motion vectors can detect the spoofing only need to move a distance. This method not only has effective for several spoofing signals from the same antenna, but can also detect single spoofing signal or multi-elements spoofing transmitter with strong ability. In the end, through theoretical analyses and simulation tests, the spoofing detection method proposed in the paper is verified to be effective. The longer baseline of the array, the longer distance to move, the shorter distance between spoofer and receiver and more vertical between DOA and receiver displacement direction lead to a better spoofing detection performance of the method proposed in this paper.