摘要
海面上的舰船目标在复杂海情的影响下存在横滚、俯仰和偏航的三维转动,其有效转动矢量的幅值和方向发生变化,导致目标散射点的多普勒体现时变和非平稳特性,从而影响对目标的精确识别。论文通过建立海面目标平动和三维摆动的运动模型,借助时频分析方法对舰船回波的多普勒特征进行分析,提出了一种结合自相关和平均幅度差函数的微动特征参数估计方法。该方法可用于估计目标的微动参数,实现对目标的分类和识别。通过使用仿真数据,验证了该方法的有效性。
Under the influence of complex sea conditions,sea-surface target has three-dimensional rotation of roll,pitch and yaw,and the amplitude and direction of the effective rotation vector change,resulting in time-varying and non-stationary character istics of the Doppler of the scattered point of the target,thus affecting the accurate identification of the target.Based on establishing the translational and three-dimensional motion models of the sea-surface target,the Doppler characteristics of the ship echo are an alyzed by means of time-frequency analysis method.A method for estimating the characteristic parameters of micro-motion com bined with autocorrelation and mean amplitude difference function is proposed in this paper.This method can be used to estimate the micro-parameters of the target and realize the classification and recognition of the target.Simulation data is used to verify the effec tiveness of the proposed method.
作者
郑芹
李勇
金微微
ZHENG Qin;LI Yong;JIN Weiwei(College of Electronic and Information Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing 211106)
出处
《舰船电子工程》
2019年第10期119-124,183,共7页
Ship Electronic Engineering
基金
南京航空航天大学研究生创新基地(实验室)开放基金项目(编号：kfjj20170403)
中央高校基本科研业务费专项资金资助
关键词
微动目标
时频分析
多普勒特征分析
微动参数估计
micro-motion target
time-frequency analysis
Doppler feature analysis
micro-motion parameters estimate
