海杂波背景下的弱目标检测方法综述

A survey of weak target detection methods in sea clutter

近年来海杂波背景下的低RCS目标检测受到海洋雷达研究者的广泛关注,海洋中的弱目标不固定、移动速度快、反射雷达回波的面积小,导致目标回波被海杂波所淹没,使得弱目标检测的难度加大。为准确区分海杂波和弱目标,主要从海杂波入手,研究其统计理论、混沌特性、分形理论以及特征联合四个方面的目标检测方法,并分析优劣情况,为接下来推动海面弱目标检测的进一步发展作铺垫。

In recent years,the detection of low RCS targets in the sea clutter background has been widely concerned by ocean radar researchers.Because the weak targets in the sea are not fixed,moving fast,and the reflected radar echo area is small,the target echo is submerged by the sea clutter,making the detection of weak targets more difficult.In order to accurately distinguish between sea clutter and weak targets,starting with sea clutter,the target detection methods are studied in four aspects including statistical theory,chaotic characteristics,fractal theory and feature combination.The advantages and disadvantages are analyzed,so as to pave the way for the further development of sea surface weak target detection.