基于多天线的GNSS压制式干扰与欺骗式干扰联合抑制方法

摘要

压制式干扰和欺骗式干扰是全球导航卫星系统(Global Navigation Satellite System, GNSS)面临的最常见且最有威胁的蓄意干扰。该文提出了一种基于多天线的GNSS压制式干扰与欺骗式干扰联合抑制方法。首先利用子空间技术抑制压制式干扰，然后利用解扩重扩算法获得的加权矢量进行欺骗式干扰识别和抑制，最后对无干扰信号再次使用解扩重扩技术形成指向真实卫星的高增益多波束。仿真结果证明所提方法可以同时抑制压制式干扰和欺骗式干扰。该方法不需要卫星来向信息，对阵列流形误差稳健。%Jamming and spoofing are the most common and serious threat intentional interferences for Global Navigation Satellite System (GNSS). A joint GNSS interference mitigation approach is proposed for jamming and spoofing issue based on multi-antenna array in this paper. Firstly, jamming is suppressed by the subspace technology. Then, spoofing is detected and mitigated by using the weighting vectors obtained by the despread-respread method. Finally, for maximizing the output of each authentic signal, the despread-respread method is reutilized to form multiple beams pointing at each of the authentic satellites. Simulation results show that the proposed algorithm can null jamming and spoofing simultaneously. The interference suppression performance of this method is not sensitive to the array manifold errors and not limited by the prior knowledge of satellites’ directions.