大下视角下旋转导引头的目标检测与跟踪技术

Target Detection and Tracking Technique of Rotating Seekers with Wide Incidence Angles

旋转弹体平台的雷达导引头在大下视角探测目标时,强地杂波背景环境相当复杂,特别是在毫米波波段,杂波单元不再被看成是大量强度相当的独立小散射体回波之和,其幅度分布明显偏离瑞利分布,很难用统一的恒定参数模型来拟合这些不规则的杂波统计特性分布,因此,旋转导引头大下视角下的目标检测与跟踪成为一项重要课题,本论文提出的自适应排序恒虚警和解旋叠加方法解决了旋转导引头大下视角下的目标检测与跟踪难题。

The background environment of strong ground clutter is quite complicated when a radar seeker on a rotating missile detects targets with a wide incidence angle, especially in the millimeter-wave band where the clutter unit is no longer considered to be sum of echoes of a large number of independent small scatterers with similar strength. Its amplitude distribution deviates from Rayleigh distribution obviously. It is very difficult to fit irregular statistical distribution of clutters with a uniform constant parameter model. Therefore, target detection and tracking of rotating seekers with wide incidence angles is an important research subject. An adaptive sequencing CFAR and unwinding superposition method is proposed to solve the problem of target detection and tracking of rotating seekers with wide incidence angles.