宽带弹道高速群目标运动精补偿方法  

Accurate wide band high velocity motion compensation for ballistic targets

作　　者：徐丹[1,2] 符吉祥 孙光才[1,2] 邢孟道[1,2] 苏涛[1,2] XU Dan;FU Jixiang;SUN Guangcai;XING Mengdao;SU Tao(National Lab of Radar Signal Processing, Xidian University, Xi’an 710071, China;Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an 710071, China)

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]西安电子科技大学信息感知技术协同创新中心,陕西西安710071

出　　处：《系统工程与电子技术》2019年第10期2205-2213,共9页Systems Engineering and Electronics

基　　金：国家重点研发计划(2017YFC1405600)资助课题

摘　　要：外场实验中宽带直采模式使得回波数据量较大,弹道目标的微动使散射点徙动严重,频谱变化剧烈。针对此时传统运动补偿不再适用和宽带直采数据处理困难的问题,本文提出宽带弹道高速群目标运动精补偿的方法。首先对宽带数据进行降采样,降低数据量。对降采样的数据使用区域Hough变换进行群目标轨迹分离并计算出对应到原始宽带数据的位置,进行粗运动补偿与信号提取。然后对提取的目标信号采用重心法进一步作运动补偿,再通过时变自回归模型进行时频分析,得到剩余平动参数与光滑的微动特征曲线。利用所得微动参数对目标信号进行精确的运动补偿。最后采用CADFEKO仿真模型实验验证了所提方法的有效性。In the out-field experiment,the amount of echo is huge based on wideb and direct sampling model. In addition, the scattering point migration of ballistic target results in serious micro motion and dramatically spectrum change. In such case, the traditional motion compensation methods are unsuitable anymore and it is difficult in processing wide band direct sampling data. To tackle such problems, an accurate algorithm for wide band high velocity ballistic targets motion compensation is proposed. Firstly, down-sample rate is performed on the wide band data to reduce the data amount and group targets are separated by region Hough transform on the desampled data.Then the target trajectories can be separated.The corresponding location in the origin wideband data can be computed. Next, signal separation is executed after preliminary motion compensation. Further compensation is made upon the extracted signal by gravity center method. The residual motion parameters and smooth micro-Doppler (m-D) feature curve can be obtained by performing time-frequency analysis based on the time varying autoregressive model. The m-D parameters are used to compensate the target signal accurately. Finally , CADFEKO simulation results verify the effective ness of the proposed method.

关 键 词：微动 高速群目标 导弹目标运动补偿 区域Hough变换 时频分析 时变自回归模型 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]