采用多级最小模方法的空时抗干扰GPS接收机

Multistage minimal module method for space-time interference suppression GPS receivers

针对抑制全球定位系统信号中期望信号方向的冲激毛刺干扰问题,提出多级最小模级联相消方法.该方法用具有最小模的样本商作为复权,替代多级维纳滤波器的权值计算,并将其用于全球定位系统信号空时抗干扰处理中.此方法能很好地抑制期望信号方向的冲激毛刺干扰,消除对自适应权值计算的影响,且复杂度低,收敛性能好.计算机仿真结果验证了算法的快收敛性能和良好的抑制期望信号方向冲激毛刺干扰的能力.

For suppression of the influence of impulsive noise spikes（outliers） from desired signal direction of arrival in GPS signals,the multistage minimal module cascaded canceller is proposed.The method substitutes the weights of the multistage Winner filter for the minimal module weights,which have the minimal module of the samples quotient,and is adopted in space-time anti-jamming processing in the GPS receiver.The method has the prominent ability to restrict the influence of impulsive noise spikes（outliers） from desired signal direction of arrival to adaptive weights,and the ability of low complexity,as well as fast convergence.Simulation results indicate the method achieves a better fast convergence ability and good performance in reducing the influence of impulsive noise spikes（outliers） on adaptive weights.