文档介绍：合成孔径雷达的动目标成像与检测
摘要
动目标的成像与检测是合成孔径雷达(SAR)领域中的研究热点之一,不论是在军事上还是在民用上都有很重要的意义。目前,世界上很多国家都在积极发展动目标的检测和成像技术,研制先进的动目标检测和成像雷达系统,努力寻找各种高效、实用的动目标检测和成像方法。本文主要研究了单通道SAR的动目标检测和成像技术,旨在提高动目标的检测概率,获取动目标的运动参数并对其精确成像。
主要工作如下:
1、分析了SAR的运动目标回波模型,探讨了目标运动引起的多普勒质心变化,以及这些变化对常规SAR成像结果的影响。
2、对SAR的动目标检测和成像原理做了介绍,分析了步进频信号和线性调频信号的一维距离像,对步进频信号的一维距离像进行了重点分析。
3、对信号进行仿真,对不同参数的一维距离像进行比较,分析仿真结果。
关键词:合成孔径雷达,动目标检测和成像,一维距离像
Moving Targets Detection and Imaging of SAR
Abstract
Moving Targets Detection and Imaging (MTDI) is hot in Synthetic Aperture Radar (SAR) research and plays an important role in both martial field and civilian field. Now many countries in the world are making great efforts to develop advanced MTDI systems and explore high efficient MTDI algorithms. The key techniques of MTDI are studied in this dissertation for getting high detection probability, accurate parameters and good images of moving targets.
The major work of this dissertation is as follows:
1. After analyzing the model of moving targets’ echoes, the changes of Doppler history are discussed in detail, which are due to targets’ moving. It is analyzed that the influence of the changes on the conventional SAR imaging.
2. In this paper, the principle of MTDI are introduced. At the same time, we analyze the High Range Resolution Profile of the step frequency signal and the linear frequency modulation signal. The High Range Resolution Profile of the step frequency signal is more important in our paper.
will simulation ,then change the parameters of the signal and analyse the difference between them.
Key words: Synthetic Aperture Radar, Moving Targets Detection and Imaging, High Range Resolution Profile.
目录
1 绪论 1
合成孔径雷达的动目标检测和成像的意义 1
合成孔径雷达研究及动态 2
5
2 SAR动目标检测和成像原理 6
SAR理论模型和成像原理 6
运动目标的回波信号分析 10
12
目标运动引起的多普勒质心变化 12
13
14
3 合成孔径雷达动目标的一维距离像 15
频率步进脉冲信号距离成像原理分析 15
频率步进雷达发射信号波形及设计准则 18
.