利用周期重复CLEAN的GNSS欺骗式干扰抑制算法

Spoofing Interference Suppression in GNSS Using Repeated CLEAN

欺骗式干扰能够引导接收机出现定位错误甚至是控制接收机,对全球卫星导航系统在民用以及军事领域的安全应用构成极大的威胁。本文针对转发式欺骗干扰的问题,提出了一种基于周期重复CLEAN的卫星导航欺骗式干扰抑制算法。首先,利用欺骗式干扰空间和功率特征以及C/A码的周期重复特性,采用CLEAN方法估计多个欺骗式干扰源来向以及欺骗式干扰源个数。其次,结合线性约束最小方差(LCMV)算法和一阶微分约束算法,计算天线自适应权值。高保真数据实验表明本文方法能抑制多个欺骗干扰,且无需接收机反馈信息,可以作为一个独立的抗欺骗式干扰模块嵌入普通接收机。

Spoofing is capable of leading to the positioning and timing error or even controlling the receiver,which poses a great threat on the safe application of global satellite navigation system in the civilian and military fields. In this paper,a novel algorithm based on repeated CLEAN is proposed for spoofing mitigation. The proposed method estimates the directions of interference sources and the spoofing number by CLEAN method based on the spatial and power characteristics of the spoofing interferences and the cycle characteristic of the C / A code. Moreover,linear constrained minimum variance（ LCMV） algorithm and the first-order derivative constraints algorithm are combined to calculate the adaptive antenna weights.The experiments show that the new method can suppress multiple spoofing interferences without feedback information of receiver. Finally,it also can be used as an independent anti-jamming module embedded the common receiver.