基于最大图像清晰度的泛探雷达目标距离-多普勒走动校正  

Range and Doppler Correction of Ubiquitous Radar Targets Based on the Maximum Image Sharpness

作　　者：李云莉 蒋文 唐先慧 叶祥龙 陆炫宇 LI Yunli;JIANG Wen;TANG Xianhui;YE Xianglong;LU Xuanyu(Sichuan Jiuzhou Electric Group Co.,Ltd,Chengdu Sichuan 621000,China)

机构地区：[1]四川九洲电器集团有限责任公司,四川成都621000

出　　处：《现代雷达》2023年第10期59-65,共7页Modern Radar

摘　　要：泛探雷达长时间的相干积累会增加目标二维走动,导致目标在距离多普勒域散焦,回波信噪比降低。有效的目标二维走动校正才能更好地体现泛探雷达的凝视特性,提升雷达目标检测性能。文中利用Keystone变换进行距离维走动校正,并建立多普勒维走动和图像清晰度的数学关系式,基于最大图像清晰度准则进行多普勒维的走动校正。该方法解决了凝视探测下的二维走动,提高目标在多普勒维的高分辨,同时提升了微弱目标检测能力。The ubiquitous radar can improve the detection probability of weak targets by long-time coherent integration called staring detection.However,long-time coherent integration can increase the two-dimensional movement of the target,i.e.range and doppler movement,leading to defocusing of the target in the RD domain and decrease SNR.Effective two-dimensional movement correction can better reflect the staring characteristics of the ubiquitous radar and improve the radar detection performance.In this paper,firstly,use the keystone transform to correct the range movement.Secondly,establish the mathematical relationship between the doppler movement and image definition.Based on the maximum image sharpness,correct the doppler movement.This method solves the two-dimensional movement problem for staring detection and improves the high resolution of the target in the doppler dimension,but also enhances the ability to detect weak targets.

关 键 词：泛探雷达 距离-多普勒走动 KEYSTONE变换 最大图像清晰度 

分 类 号：TN957.52[电子电信—信号与信息处理]