摘要
为了研究转动目标激光雷达回波信号中目标运动特征的提取问题,建立了转动目标微多普勒效应的点散射模型,并进行了仿真研究,获得了激光雷达探测转动目标的回波信号图。针对转动目标雷达回波信号成分复杂,采用一般的时频分析方法信号可读性差的问题,提出了应用时频分析的重排算法来分析信号,获得了良好的时频特性,估计出了目标的相关运动参数,证明了该方法用于分析转动目标微多普勒信号的有效性,为利用雷达回波信号的时频特征实现转动目标的识别奠定了基础。
In order to study that how to extract target＇s movement features from the lidar returned signal of the rotation target, a point-scatter model for the micro-Doppler effect of rotation target was built, and the simulation was conducted, and the returned signal of rotation target in lidar was attained. To the question of poor readability when using conventional time-frequency analysis method, a reassigned method of time-frequency analysis was introduced to analyze the signal, better time-frequency characteristics was achieved, some movement parameters of the target were estimated, it confirms the validity of this method on using it to analyze the micro-Doppler signal induced by target rotation, and it laid a foundation for the recognition of rotation target by using the time-frequency characteristics of the radar returned signal.
出处
《激光与红外》
CAS
CSCD
北大核心
2007年第11期1216-1219,共4页
Laser & Infrared
基金
国防预先研究基金项目(51403040203QT0710)资助
关键词
微多普勒效应
转动目标
点散射模型
时频分析
重排谱图
仿真
micro-Doppler effect
rotation target
point scatter model
time-frequency analysis
reassigned spectrogram
simulation
