单极化雷达的空域零相移干扰抑制极化滤波器

Spatial null phase-shift interference suppression polarization filter design for single polarized radars

单极化雷达不具备极化信息获取和处理能力,这对极化域抗干扰造成了根本性的困难。利用天线在空域扫描时对来波的空域极化调制效应,研究了单极化雷达回波信号的极化分解与极化参数等估计方法。在此基础上,讨论了一种空域零相移干扰抑制极化滤波器的设计方法。该法不仅能够有效抑制干扰,而且不会造成目标信号的幅度和相位失真,实现了雷达相参处理和极化信息处理的兼容工作。仿真和实测数据验证了方法的有效性和可行性。

Single polarized radars have not the polarization measurement and processing ability,which brings fundamental difficulty in anti-jamming in polarization domain.By using the spatial polarization-modulation effect on incoming signals as antenna scanning,the polarization decomposition and parameter estimation of single polarization returns are studied.Based on this principle,a spatial null phase-shift interference suppression polarization filter（SNPS-ISPF） is designed.It can suppress jamming and will not change the amplitude and phase of target signals after polarization filtering.It enables radar coherent processing and polarization information processing to work simultaneously.The validity is proved by simulation and derived data.