一种基于多约束条件的目标一维像尺寸提取方法

雷达高分辨一维像反映了目标的精细结构信息在雷达视线上的投影,正确提取目标一维像尺寸是计算宽带RCS,反演目标真实长度,实现目标分类识别的基础。文中针对在目标一维像尺寸提取时存在的目标分裂、多目标情况等情况,提出一种基于多约束条件计数的目标一维像尺寸提取算法,可以实现宽带距离窗内多个目标一维像尺寸的同时提取,经过实测数据验证,文中提出的一维像尺寸提取算法平均提取误差小于2个距离门,具有优良的性能和提取稳定性,可有效避免海杂波,目标分裂多目标等情况的影响。

An Extraction Method of Radar Target Length from High Resolution Range Profile with Multi-constraints

High resolution range profile(HRRP) is the projection of target echo on the line of radar sight,which shows the fine structure and texture of the target. The accurate extraction of target in HRRP is the premise of the calculation of wide-band RCS, the derivation of target real size and target classification, etc. Aimed at the phenomena of target split and multi-targets in the extraction process, An method based on count with multi-constraint conditions is proposed to extract the target length from HRRP. Meanwhile, this method can extract the lengths of multiple targets in the wideband sample window at one time. Experimental results and analysis are provided to show that, the method can effectively acquire the radial projection length of the target with high precision, the average extraction error is less than 2 range bins, and the influence of target split and multi-targets are avoided.