摘要现代战争中,轮式车辆和履带式车辆通常承担不同的任务,这也就决定了其威胁程 度的不同,因此对不同车辆的目标识别在现代战争中有重要意义。由于不同的物体都存 在其特有的微运动,不同车辆在行驶时其固有结构部件会对雷达发射波产生不同的微多 普勒调制,文章通过建立轮式和履带式车辆模型以及回波模型,获得并对含有微多普勒 信息的回波信号进行分析,采用时频分析方法提取运动车辆的微多普勒信号,最终对车 辆进行识别和分类。77731
本文主要针对轮式车辆和两类履带式车辆进行了建模工作,并且对接收到的两类车 辆的回波信号采用了短时傅里叶变换、小波变换的时频分析方法,获得了不同车辆回波 信号中含有的特定的微多普勒信息。研究表明,轮式车辆和履带式车辆产生的微多普勒 调制不同,可以利用其识别车辆类型,从而在战场中及时有效破坏敌方火力、阻止敌方 攻击。
毕业论文关键字 轮式车辆 履带式车辆 车辆识别 回波模型 微多普勒效应 时频分析
Title Research of vehicles’feature extraction based on Micro-Doppler effect
Abstract Wheeled vehicles and tracked vehicles usually undertake different tasks in the war,which determines the degree of its threat, So the target recognition of different vehicles is important in the modern war。 Due to the different object has its unique micro motion, the inherent structure parts of different vehicles will produce different micro doppler modulation in the radar wave。This paper obtains echo signal containing the micro-doppler information by establishing wheeled and tracked vehicle model and the echo model。It also extracts micro-doppler signal of moving vehicle by time-frequency analysis method to recognize and classify vehicle。
The paper focused on building models of wheeled vehicles and two types of tracked vehicles。And we analyse vehicles’echo signals by time-frequency analysis method,such as STFT、WT,to get the different micre-doppler modulations of different vehicles。Studies have shown that the micro-doppler modulation of wheeled vehicles and tracked vehicles is different。And we can use it to the identification and classification。Thus we can damage enemy fire,prevent an enemy attack effectively and timely。
Keywords Wheeled vehicles tracked vehicles Vehicle identification echo model Micro-doppler effect time-frequency analysis
目 录
1 绪论 1
1。1 课题的意义 1
1。2 现今国内外对其相关的研究情况 1
1。3 本论文采用的研究方法和理想研究结果 3
2 微多普勒效应概述 4
2。1 多普勒效应简介 4
2。2 微多普勒效应的原理 5
2。3 微多普勒效应的应用 5
2。4 基于微多普勒效应的目标识别技术的基本原理 6
3 运动车辆建模