GPS多波束盲自适应动态干扰抑制算法

依据全球定位系统(global position system, GPS) C/A码信号的周期重复特点,提出了一种新的多波束盲自适应动态干扰抑制算法。首先利用子空间投影和零陷展宽技术抑制动态干扰,然后将无干扰的数据送入多波束形成器,由于GPS信号和噪声的重复周期不同,所以可以根据延迟协方差矩阵的分解得到信号子空间,进而确定每个波束的权矢量。仿真证明,该方法能有效抑制动态干扰,同时又能将波束的主瓣对准卫星方向,从而提高卫星信号的信噪比。

Blind adaptive algorithm of multiple beamformers for moving interference suppression in GPS receiver

A blind adaptive algorithm of multiple beamformers for the moving interference suppression in global position system (GPS) receiver is presented, which relies on the unique structure of the C/A code of the GPS. Firstly, the moving interference is suppressed by projecting the received data on the noise subspace with the nulls widening technique. Then,the obtained data matrix which only contains contributions from the GPS components and noise is processed by multiple beamformers, whose weight vectors are determined by the eigenvalue decomposition of the correlation matrix of the received data between its delayed version. Simulation results show that the proposed algorithm can effectively eliminate moving interference and enhance the GPS signals at the array output.