Aiming at anti-jamming need of pulse radar, a new polarization anti-jamming method is studied, which makes full use of Kalman filter technique and oblique projection operator. When the polarization parame ters of a target are known, the polarization parameters of jamming signal can be firstly estimated by using Kal man filtering technique, and then the oblique projection operator can be calculated. Finally by using oblique projection filter technique, jamming signal will be suppressed greatly. Simulation results show that the polariza tion parameters of jamming signal can be estimated quickly and accurately by Kalman filter technique and jam ming can be suppressed greatly by using calculated oblique projection operator. In addition, using this method, the amplitude and phase of target signal are kept steady, so that follow-up signal processing can be carried out smoothly.%针对脉冲体制雷达抗干扰的需求,综合利用卡尔曼滤波技术和斜投影算子,研究了一种新的极化抗干扰方法.在目标极化状态已知的情况下,利用卡尔曼滤波技术估计干扰的极化状态参数,从而求得斜投影算子,再利用斜投影滤波技术实现了抗干扰的目的.仿真结果表明,卡尔曼滤波技术可快速准确地估计出干扰极化参数,求得的斜投影算子可大幅度抑制干扰,并且保持了目标信号的幅度和相位不变性,为后续的雷达信号处理提供了有利条件.
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