交叉极化干扰对探测跟踪雷达测角影响研究

Study on the Influence of Cross-Polarization Interference on Angle Measurement of Detecting and Tracking Radar

在现代防御体系中,对目标进行准确的角度测量是进行有效探测跟踪的前提。研究了交叉极化干扰对极化匹配单脉冲阵列雷达测角影响。首先阐述了阵列雷达极化匹配单脉冲测角方法,分析了回波极化状态估计和虚拟极化匹配接收2个关键环节。然后,理论分析了交叉极化干扰对极化匹配单脉冲阵列雷达测角影响,从数学上证明了该干扰可带来极化匹配测角的误差,导致测角精度下降,并给出了交叉极化干扰对极化匹配单脉冲阵列雷达测角影响流程图。最后,对极化阵列雷达的测角性能进行了交叉极化干扰仿真,得到了RMSE随交叉极化干扰强度的变化曲线。仿真结果表明,交叉极化干扰会导致阵列雷达测角性能的下降,并随着交叉极化干扰强度的增大测角误差越来越大。

In the modern defense system,accurate angle measurement of the target is the premise for effective detection and tracking.The effect of cross-polarization interference on the angle measurement of a polarization-matched single-pulse array radar was studied .Firstly,the polarization radar single-pulse angle measurement method of array radar was described,and two key factors of echo polarization state estimation and virtual polarization matching reception were analyzed.Then,the effect of cross-polarization interference on the angle measurement of polarization-matched single-pulse array radar was theoretically analyzed.It is proved mathematically that the interference can bring errors of polarization-matching angle measurement,leading to a decrease in angle measurement accuracy.The influence flow chart of cross-polarization interference on the array radar angle measurement was given.Finally,cross-polarization interference on the polar array radar angle measurement performance was simulated,and the variation curve of RMSE with cross-polarization interference intensity was obtained.The simulation results show that the cross-polarization interference will lead to the decline of the array radar angle measurement performance,and the measurement angle error will increase as the cross-polarization interference intensity increases.