针对间歇采样转发干扰问题,基于几何代数工具重新审视匹配滤波过程,以投影角余角作为滤波器输出构造了几何匹配滤波器并分析了其对间歇采样直接转发干扰的响应特性。仿真中利用几何匹配滤波器输出对干扰采样占空比进行了估计,为下一步抑制干扰提供了先验知识;通过对比不同参数下几何匹配滤波器与传统匹配滤波器对目标与干扰的输出,说明了几何匹配滤波器对强干扰的优良适应能力以及给目标检测带来的增益,为解决雷达对抗切片转发干扰提供了一种新的几何视角。

Aiming at the counter of intermittent sampling repeater interference, the matched filtering process was re-examined based on the tools of geometric algebra. Furthermore, the geometric matched filter is proposed with the complementary angle of the projection angle as its output. Then, the geometric matched filter’s response characteristics to intermittent sampling repeater interference are analyzed. The geometric matched filter is applied to estimate the duty of the interference, which provides a priori knowledge for the suppression of the interference Meanwhile, several simulations confirm that the geometric matched filter overperforms in the adaptability to the background of strong interference and the target detection. The presented results provide a new geometric perspective for the counter of slicing forward jamming.

TN974