合成孔径激光雷达的目标重构方法  

Target reconstruction method of SAR

作　　者：闫晶[1] 连婷 林海霞[1] YAN Jing;LIAN Ting;LIN Haixia(Hebei Polytechnic Institute,Shijiazhuang 050091,China)

机构地区：[1]河北工程技术学院,石家庄050091

出　　处：《激光杂志》2021年第7期176-179,共4页Laser Journal

基　　金：河北省教育厅科技处项目(No.Z2018207)。

摘　　要：针对传统合成孔径激光雷达目标重构方法中存在的目标追踪精度低、容错能力较差等问题,提出一种新的合成孔径激光雷达目标重构方法。通过分析合成孔径激光雷达的工作原理,明确合成孔径激光雷达的发射信号以及回波信号,并对两种信号进行处理;在此基础上,设置相应块搜索子图,计算雷达目标成像数据点灰度值的平均值,利用去均值法消除数据量偏差,提高算法处理不合格数据的抗干扰能力;利用一阶可导的Bezier曲线拟合,获取合格重构数据点,完成合成孔径激光雷达的目标重构。实验结果表明:采用所提方法进行目标重构的误差率仅为2%左右,且其曲线拟合的效果较好,具有一定实际意义。Aiming at low tracking accuracy and poor fault tolerance in traditional SAR target reconstruction methods,a new target reconstruction method for SAR is proposed.By analysing the working principle of synthetic aperture laser radar,the transmitting signal and echo signal of synthetic aperture laser radar is defined,and the two kinds of signals are processed.On this basis,the corresponding block search submap is set to calculate the average value of the grey value of radar target imaging data points,and the data deviation is eliminated utilising de averaging method to improve the anti-jamming ability of the algorithm in processing unqualified data.The first-order derivative Bezier curve fitting is used to obtain qualified reconstruction data points to complete the target reconstruction of SAR.The experimental results show that the error rate of target reconstruction using the proposed method is only about 2%,and the curve fitting effect is good,which has particular practical significance.

关 键 词：合成孔径激光雷达 目标重构 回波信号 灰度值 Bezier曲线拟合 

分 类 号：TN958.98[电子电信—信号与信息处理]