雷达极化检测器性能对比分析

Contrastive Analysis of the Performances of Radar Polarimetric Detectors

该文在建立极化雷达杂波和目标回波模型基础上,采用蒙特卡洛仿真方法,对比分析了最佳极化检测器(OPD)、极化白化滤波器(PWF)、最佳张成检测器(OSD)、极化匹配滤波器(PMF)、功率最大综合检测器(PMSD)和单通道检测器(SCD)的理想检测性能,同时,结合各极化检测器的检验统计量,分析了各自的实现难易度。分析结果表明,PWF、OSD和PMSD理想检测性能较好,且较易实现。考虑到工程应用中,PWF、OSD需要杂波协方差先验信息,基于杂波协方差及其关键参数估计,文章进一步对比分析了PWF、OSD和PMSD的自适应检测性能。结果表明,当观测次数大于64时,PWF自适应检测性能最好。

Contrastive analysis of the performance of various polarimetric detectors is the basis of polarimetric radar detector design in engineering.In this paper,the clutter and the target echo received by polarimetric radar are modeled.Based on this,ideal detection performances of optimal polarimetric detector （OPD）,polarimetric whitening filter （PWF）,optimal span detector （OSD）,polarimetric matched filter （PMF）,power maximization synthesis detector （PMSD） and single channel detector （SCD） are compared by using Monte Carlo simulations.At the same time,implementation difficulties of the six polarimetric detectors are analyzed according to their test statistics.Simulation and analysis results indicate that PWF,OSD and PMSD have good ideal detection performances and are convenient to implement in engineering.Considering PWF and OSD require prior knowledge of clutter covariance in engineering application,adaptive detection performances of PWF,OSD and PMSD are further compared based on the estimated clutter covariance and its key parameters.Comparison results demonstrate that PWF has best adaptive detection performance when radar observation times is larger than 64.