一种基于阵列天线的卫星导航欺骗干扰检测与抑制方法

提出了一种基于阵列天线的卫星导航欺骗干扰检测与抑制方法。利用真实卫星导航信号从上半球空间多个方向入射到阵列天线而欺骗干扰信号则是从同一方向入射到阵列天线的差异性进行干扰检测判决。首先，对阵列天线每个阵元单元通道接收信号进行多颗卫星并行解扩从处理；其次，利用解扩后的阵列数据对每颗卫星进行方位估计；再次，根据估计卫星来向数据的一致性进行干扰检测判决；最后，在判决存在欺骗干扰时利用欺骗干扰的方向信息重构协方差矩阵，采用自适应调零算法对欺骗干扰进行抑制。通过计算机仿真试验对所提方法的正确性和有效性进行了验证。

Spoofing Interference Detection and Suppression Method Based on Array Antenna for Satellite Navigation

An array antenna based spoofing interference detection and suppression method for satellite navigation is proposed. Authentic satellite navigation signals incident to array antenna from multiple directions in upper hemisphere space while spoofing signals incident to array antenna from the same direction are used for interference detection and judgment. Firstly, the signals received by each array element channel are dispreading in parallel. Secondly, the azimuth estimation of each satellite is carried out by using the array data after dispreading. Next, interference detection decisions are made according to the consistency of the estimated satellite data. Finally, the covariance matrix is reconstructed with the direction information of the spoofing interference, and the adaptive nulling algorithm is used to suppress the spoofing interference. The correctness and effectiveness of the proposed method are verified by computer simulation.