基于循环平稳的级联空时GPS抗干扰方法

Cyclostationarity based cascaded space-time anti-jamming processor designed to appeal to GPS receivers

针对级联空时GPS抗干扰中联合空时滤波器组计算量大的问题,提出了一种联合空时滤波器组的实现方法.该方法运算复杂度较低,并具有模块化结构,使级联处理便于工程实现.在强干扰情况下,进行级联空时处理,先采用空时处理基本消除干扰,然后利用循环平稳性进行波束形成,可以进一步提高抗干扰能力.仿真实验证实了该方法的有效性.

In order to reduce the computational burden of space-time processing filter groups,a space-time processing filter groups designed method is proposed.This method can be easily implemented owing to low computational complexity and modular structures.Under the strong jamming scenario a cascaded space-time adaptive processing scheme is deviced with its first stage as ordinary space-time adaptive processing with a certain constraint and the second stage as the beam former aided with information extracted from the cyclic-covariance matrix.Experiments show that such a cascaded scheme could bring signal-to-noise-ratio improvement for the space-time processing.