利用旋转天线载波相位双差进行欺骗干扰检测技术

有效的欺骗干扰检测,是卫星导航接收机实施欺骗干扰抑制,防止产生错误定位、测速和定时信息的前提。提出了一种基于旋转天线载波相位双差的卫星导航接收机欺骗干扰检测技术,在对接收机天线匀速旋转时输出载波相位测量值进行平动消除和非相关差分处理后,利用广义似然比检验实现了对单一发射天线输出欺骗干扰信号的检测。进一步分析了旋转半径、转速和数据长度对检测性能的影响,指出增加数据长度是提升检测性能的必然选择,并定义了比较全局检测性能和限制检测性能下降的检测盲区。最后,通过蒙特卡洛方法进行了仿真验证,结果验证了所提检测方法和检测性能分析的正确性。

Spoofing Detection Technique Based on Carrier Phase Double Difference of Spin-Antenna

Effective spoofing detection is the premise for GNSS receiver carrying out spoofing suppression, preventing the occurrence of positioning, velocity, and timing information errors. A spoofing detection technique for GNSS receiver is proposed based on carrier phase double difference of a Spin-Antenna. After translational motion elimination and non-related differential processing, the carrier phase value of the uniform rotation of the receiver antenna can be used to realize the detection of single transmit antenna output spoofing signal by generalized likelihood ratio test. Furthermore, the impact of rotation speed, radius, and the length of data on detection performance is analyzed. The results show that increasing the length of data is the inevitable choice for improving detection performance. A non-detection zone is defined for global detection performance by comparing and limiting the decrease in the detection performance. A Monte-Carlo simulation illustrates the correctness of the method and analysis.