电波科学学报2017，Vol.32Issue(4)：416-426,11.DOI:10.13443/j.cjors.2017022401
雷达多视极化检测器性能对比分析
Contrastive analysis of the performances of radar multi-look polarimetric detectors
摘要
Abstract
Contrastive analysis of the performances of radar polarimetric detectors can provide important reference for its design,while the detection performance evaluation theory is still imperfect,especially lacking of the analysis results for multi-look case.Based on the complex Wishart distribution of the polarimetric radar multi-look covariance matrix,a contrastive analysis of the performance of 7 classical polarimetric detectors is presented using both Monte Carlo simulations and analytical method after an area under curve (AUC) index is proposed for evaluation.The ranking result for 4-look case is:optimal polarimetric detector (OPD)＞ polarimetric whitening filter (PWF)≈identity likelihood ratio test (ILRT)＞ optimal sapn detector (OSD)＞ polarimetric matched filter (PMF)≈≈ span detector (SD)＞ single channel detector (SCD).At the same time,a novel approach to compute the constant false-alarm rate (CFAR) threshold is proposed based on Gamma function,and two kinds of general mathematical expressions of the theoretical performances of those detectors with linearly weighted form are also derived for multi-look case.Finally,the polarimetric SAR data is used to verify the above results.关键词
雷达极化/多视处理/检测性能/CFAR门限Key words
radar polarimetry/multi-look processing/detection performance/CFAR threshold分类
信息技术与安全科学引用本文复制引用
张鹏,张嘉峰,刘涛..雷达多视极化检测器性能对比分析[J].电波科学学报,2017,32(4):416-426,11.基金项目
国家自然科学基金(基于对数空间理论的极化SAR图像舰船目标检测新方法61372165,基于协方差矩阵的极化干涉SAR图像海面慢动目标检测新方法研究61771483) （基于对数空间理论的极化SAR图像舰船目标检测新方法61372165,基于协方差矩阵的极化干涉SAR图像海面慢动目标检测新方法研究61771483）
