GPS抗干扰单星约束自适应滤波器组设计与仿真

Design and Simulation of Per Satellite Power Minimization Adaptive Filter Groups Used in GPS Anti-jamming System

提出了一种分别针对多颗GPS卫星的波束形成自适应抗干扰实现方法,称为单星约束自适应滤波器组方法,用于GPS抗干扰处理,各个滤波器使阵列天线形成的主瓣分别对准每个期望卫星,从而提高接收信干噪比。该方法的自适应部分通过Givens旋转实现,并利用Givens旋转的结构特点,共用了大部分运算,降低了单星约束滤波器组的运算量。相比多星约束方法,能够提高信干噪比,并且计算量不会显著增加。仿真结果表明该方法相比多星约束方法,能显著提高信干噪比。

A kind of beamforming method was proposed,used in GPS antijamming processing,which was called per satellite power minimization adaptive filter groups.Each of the filters set main-lobe of array antennas alignment per expectation satellites.It led to enhancement of signal-to-noise ratio.The adaptive part of this method was realized by the Givens rotation,and the computation load of the ＂per satellite power minimization filter groups＂ was reduced based on the modular structures of Givens rotation.Compare with ＂joint satellite power minimizetion processor＂,SINR of this method was enhanced,and computation load of this method was inapparently enhanced.Simulation results reveal that this algorithm has better performance than joint satellite power minimization adaptive filter.