摘要逆合成孔径雷达拥有很大的带宽，以及很好的距离向的分辨率。ISAR是通过利用目标与雷达的相对转动来得到多普勒频率变化，从而取得方向位的信息。ISAR能够全天时、全天候、远距离地获得目标的详细特性,它是现代雷达发展的一个重要的方向。由于机动目标在空间里飞行的时候，其速度、角度、加速度等参数都是在不断变化的，所以对于提升这类目标的成像的性能就变成目前越来越重要的问题。由于机动目标是非合作的，我们很难得到目标的精确位置信息，这使得逆合成孔径雷达成像技术的难度有所增加。
本文根据逆合成孔径雷达回波信号出发，论述了逆合成孔径雷达成像的处理方法。并详细研究了针对机动目标逆合成孔径雷达的成像算法，分别对飞机、卫星等空间目标进行了仿真研究，方法的有效性得到了验证，最终得到了成像结果。这些成果对于机动目标成像的应用以及工程中都有着一定的参考价值。22343
关键词 机动目标 逆合成孔径雷达 时频变换
毕业论文设计说明书（论文）外文摘要
Title Study of Inverse Synthetic Aperture Radar Imaging Algorithms for Maneuvering Target
Abstract
Inverse synthetic aperture radar has wide bandwidth and good range resolution. It uses doppler frequency change caused by the rotation between radar and the target to get the information of directions. It could obtain the detailed feature of targets in all-weather, all day long and long distance. It is an important direction in the development of modern radar. Because maneuvering target flies in space , the parameters such as speed, angle and acceleration change constantly, improving the image quality of this kind of target becomes a more and more important problem. Because the maneuvering target is non-cooperative, it is difficult to obtain exact location information, which makes the inverse synthetic aperture radar imaging more difficult.
Based on the inverse synthetic aperture radar echo signal, the processing method of inverse synthetic aperture radar imaging is discussed in this dissertation. The inverse synthetic aperture radar imaging algorithms for maneuvering targets, simulations to planes, satellite and other space target, the effectiveness of the methods that used are studied in detail. The imaging results are also given in the end of this dissertation, which have a certain reference value for engineering applications for the maneuvering target imaging.
Keywords Maneuvering target ISAR Time-frequency transform
目次
1 引言 5
1.1 机动目标ISAR 成像发展现状 5
1.2 成像技术的应用 8
1.3 本文研究的目的及意义 9
1.4 本文研究的内容 10
2 ISAR成像算法研究 11
2.1 引言 11
2.2 成像算法 12
2.3 回波信号 14
2.4 线性调频信号 16
2.5 运动补偿 18
3 机动目标成像算法 20
3.1 引言 20
3.2 时频变换 21
3.3 短时傅里叶变换 22
3.4 基于时频变换的ISAR成像 22
4 仿真实验 24
4.1 仿真参数 25
4.2 仿真模型 26
4.3 飞机仿真 27
4.4 战斗机仿真 28
4.5 卫星仿真 29
结论 30 机动目标逆合成孔径雷达成像算法研究:http://www.youerw.com/tongxin/lunwen_14933.html