卫星导航接收机抗欺骗干扰极大似然检测性能分析

欺骗干扰给卫星导航接收机带来巨大威胁,而现有的文献均把欺骗干扰识别作为抗欺骗干扰的主要研究方向,而涉及欺骗干扰抑制方面的文献很少.本文针对卫星导航接收机抗产生式欺骗干扰问题,根据接收机具有不同干扰先验信息的3种情形,分别提出并证明了3个命题.这些命题给出了极大似然检测器在干扰背景下对真实卫星数据的检测性能界.命题表明,在具备干扰信道先验信息时,极大似然检测器具有良好的抗产生式欺骗干扰性能.仿真实验验证了理论分析的正确性和有效性.

Performance analysis of maximum likelihood detection for satellite navigation receiver anti-spoofing

Spoofing interference is a huge threat to satellite navigation receivers. Most existing works focus on identification of the spoofing interference, but research on the rejection of the spoofing is lacking. To make up this lack, in this paper, the rejection of the spoofing jamming is concerned. Specifically, three cases are discriminated according to situations of prior information on the spoofing at the receiver side. For each case, a maximum likelihood （ML） detector is designed and its performance is analyzed. These analyses show that the ML detectors can provide better anti-jamming performance when the receiver has prior information of the spoofing. Simulations confirm our theoretical analyses.