Satellite navigation deception signal detection method based on frequency domain parameters

The invention discloses a satellite navigation deception signal detection method based on frequency domain parameters. The method comprises the following steps: 1, receiving a satellite navigation signal L1 through a GPS receiving antenna, and analyzing and processing the satellite navigation signal L1 to obtain a carrier-to-noise ratio of the satellite navigation signal L1; 2, preprocessing to obtain a time domain signal; 3, performing low-frequency power spectrum processing on the time domain signal to obtain a low-frequency power spectrum signal X [k]; 4, Kalman filtering is carried out on the X [k]; and 5, whether a deception signal exists in the satellite signal or not is judged according to a feature parameter root mean square value. According to the invention, high detection accuracy can be realized through common satellite navigation deception signal detection equipment. 本发明公开了一种基于频域参数的卫星导航欺骗信号检测方法；其包括以下步骤：步骤1：通过GPS接收天线接收卫星导航信号L1，分析处理后得到导航信号载噪比；步骤2：对预处理，得到时域信号；步骤3：对时域信号进行低频功率谱处理，得到低频功率谱信号X[k]；步骤4：对X[k