一种新的极化抗干扰方法

A New Method of Polarization AntiJamming

中文关键词:  卡尔曼滤波  斜投影算子  极化滤波  抗干扰  电子对抗

英文关键词:Kalman filter  oblique projection operator  polarization filter  antijamming  ECM

中文摘要:

      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。

英文摘要:

      Aiming at antijamming need of pulse radar,a new polarization antijamming method is studied,which makes full use of Kalman filter technique and oblique projection operator.When the polarization parameters of a target are known,the polarization parameters of jamming signal can be firstly estimated by using Kalman 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 polarization parameters of jamming signal can be estimated quickly and accurately by Kalman filter technique and jamming 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 followup signal processing can be carried out smoothly.