一种GPS信号转发欺骗干扰检测技术

针对 GPS 信号的码相关特性，本文提出一种基于 FFT 的卫星信号转发欺骗干扰检测方法，该方法可以一次性同时输出多个码相位对应的相关值。利用转发信号延迟于真实信号的特点，超过检测门限的滞后相关峰对应信号即为欺骗信号。经仿真验证，上述方法可以有效识别转发延迟不小于 1.5 个码片的欺骗干扰信号。

Technology of Anti-Jamming Based on Amplitude-Domain Process

According to the code correlation features of GPS, this paper proposes the interference detection method for the repeater deception jamming satellite signal based on Fast Fourier Transform Algorithm, and it could output the correlation values of multiple code phases only one time. The interference detection method uses the features of forward single delay to true single, and the forward spoofing single is the delayed correlation peak single over detection threshold. The simulation results show that the interference detection method could identify effectively the forward spoofing single that forward delay is not less than 1.5chips.