一种基于正交加权约束的GPS抗干扰盲算法

A Blind GPS Anti-jamming Algorithm Based on the Orthogonal Weighted Constraint

针对GPS信号C/A码的周期重复特性,联合CAB算法和子空间技术提出了一种盲自适应波束形成方法。该算法通过将CAB算法的权矢量和控制矢量约束到干扰导向矢量的正交补空间内,使之在期望信号方向上产生高的增益,并在干扰方向上形成零陷。该方法具有盲处理、收敛速度快和低计算复杂度等优点。仿真结果证明了算法的有效性。

Aimed at the cyclic character of GPS C/A signal,a blind adaptive beamforming algorithm for Global Positioning System （GPS） is proposed in this paper,which combines the Cyclic Adaptive Beamforming （CAB） algorithm with subspace technique. The new algorithm can generate high gain toward the satellite direction and form the nulls in the directions of jammers by constraining both the weight vector and control vector of the CAB algorithm to the orthogonal space of the steering vectors of jammers. The proposed algorithm has the advantages such as no requirement of any knowledge of the transmitted signals and the satellite locations, fast convergence speed,and low computation complexity. Simulation results verify the effect of the proposed algorithm.