舰载雷达复杂环境下的CFAR选择  

CFAR Selection for Ship-borne Radar in Complex Environment

作　　者：郑琦[1] 陈栋[1] 王其冲[1] 

机构地区：[1]南京电子技术研究所,南京210013

出　　处：《现代雷达》2009年第4期15-18,共4页Modern Radar

摘　　要：舰载雷达的使用环境非常复杂,回波中包含了海杂波、气象杂波、目标回波以及干扰信号等。其杂波会对雷达正常工作造成恶劣影响,增加后端处理通道的工作量,导致虚假航迹数量增加。对于杂波的处理需采用综合手段,其中一项有效措施就是采用合理恒虚警率(CFAR)设计。该文从舰载雷达回波特性入手,重点分析了海杂波的特性,并对典型环境下雷达的CFAR设计提出了选择建议。The operational environment of ship-borne radar is very complex. Besides the target signal, the echos also contain sea clutter, atmospheric clutter and potential interferences etc. These clutters are harmful to the normal operation of radar, since they will increase the data processing load and induce especially the false track. Comprehensive methods should be employed to mitigate the clutter. Proper Constant False Alarm Ratio（CFAR） design is one of efficient measures. Beginning from proper investigation of ship-borne radar echo, the characteristics of sea clutter are analysed in detail in this paper. Some suggestions are then made for radar CFAR design in a typical environment.

关 键 词：海杂波 恒虚警率 瑞利分布 正态-对数分布 韦布尔分布 K分布 

分 类 号：TN959.72[电子电信—信号与信息处理]