逆合成孔径雷达成像问题研究

【作者】 陈安；

【导师】 钱玲；

【作者基本信息】 南京理工大学 ， 信号与信息处理， 2004， 硕士

【摘要】 逆合成孔径雷达(ISAR)是指固定雷达对运动目标成像。它能全天时、全天候、远距离地获取目标形状的细节特征，它是现代雷达技术的一项重要突破，在军事和民用上都具有重要意义。 本文结合我国实测ISAR数据，针对非合作运动目标的ISAR成像在运动补偿和大转角谱域成像方面进行了深入的研究。归纳起来，本文的内容主要包括以下几个方面： 1．介绍了成像雷达的发展历史，简要评述了国内外在这方面研究的主要成果。 2．介绍了逆合成孔径雷达运动补偿的概念，重点分析包络对齐和相位补偿。 3．深入研究了逆合成孔径雷达成像的距离—多普勒成像原理和模拟方法。 4．深入分析了逆合成孔径雷达的散射点距离单元走动问题，提出了极坐标插值的方法，对成像结果做出了改进。 5．对全文工作进行总结，指出存在的问题和进一步研究的方向。更多还原

【Abstract】 Inverse synthetic aperture radar (ISAR) imaging involves stationary radar viewing moving targets. It has the ability to acquire the imaging of the targets over a long distance under all weather conditions. In fact imaging is an important breakthrough in the fields of modern radar technique. It is very important to not only military but also civilian use.The main work of this dissertation is focused on motion compensation and radar imaging with wide angle based on the experimental data recorded by our country. The content of this dissertation is summarized as following:1. First gives a brief historical perspective of radar imaging. Then ,review main achievements.2. Introduce the basic concepts of Motion compensation., then we give a detailed research on the two steps of the Motion compensation-range alignment and phase compensation respectively.3. studies the principles of range-doppler radar imaging, and give some simulation results.4. make a detailed research on the phenomena of the scatter migration through range cell ,presents the polar-format interpolation processing to improve the imaging quality of ISAR.5. summarizes the whole dissertation and points out some important problems remaining to be solved.更多还原