双isar系统的分辨率和微多普勒效应

Q2 Physics and Astronomy

雷达学报 Pub Date : 2013-01-01 DOI:10.3724/sp.j.1300.2013.13039

Deng Dong-hu, Z. Qun, Luo Ying, Zhu Ren-fei

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引用次数: 3

摘要

与单基地雷达相比，双基地雷达由于其空间复杂性而具有许多特殊的特性。双基地逆合成孔径雷达(Bi-ISAR)可以作为一种获取非合作目标图像的雷达成像工具。在本研究中，我们首先分析了Bi-ISAR系统的距离和方位分辨率。为了分析这种方位分辨率及其空间变化特性，引入了控制多普勒带宽的定义，克服了目标视角分集计算的困难。然后，对Bi-ISAR系统中目标的振动和旋转引起的微多普勒效应进行了详细的研究。通过比较双isar系统和单isar系统在微多普勒效应上的差异，对扩展霍夫变换进行修正，提取目标的真实微运动特征。最后，给出了一些仿真结果来验证理论推导并说明所提方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Resolution and Micro-Doppler Effect in Bi-ISAR System

Compared to the monostatic radar, bistatic radar has many special characteristics because of its spatial complexity. Bistatic Inverse Synthetic Aperture Radar (Bi-ISAR) can be employed as a radar imaging tool for obtaining non-cooperative target images. In this study, we first analyze the range and azimuth resolution of a Bi-ISAR system. To analyze this azimuth resolution and its spatial-variety characteristic, a definition called con-Doppler bandwidth is introduced, which helps overcome the difficulty of the target's viewing angle diversity calculation. Then, a detailed investigation is conducted to study the micro-Doppler effect caused by the vibration and the rotation of the target in the Bi-ISAR system. By comparing the difference in the micro-Doppler effect between the Bi-ISAR system and the Mono-ISAR system, we modify the extended Hough transform to extract the real micro-motion features of the targets. Finally, we provide some simulation results to validate the theoretical derivation and to illustrate the effectiveness of the proposed method.

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来源期刊

雷达学报 Physics and Astronomy-Instrumentation

CiteScore

4.10

自引率

0.00%

发文量

882

期刊介绍： Journal of Radars was founded in 2012 by the Institute of Space and Astronautical Information Innovation of the Chinese Academy of Sciences (formerly the Institute of Electronics) and the China Radar Industry Association (CRIA), which is located in the high-end academic journal and academic exchange platform in the field of radar, and is committed to promoting and leading the scientific and technological development in the field of radar. The journal can publish Chinese papers and English papers, and is now a bimonthly journal. Journal of Radars focuses on theory, originality and foresight, and its scope of coverage mainly includes: radar theory and system, radar signal and data processing technology, radar imaging technology, radar identification and application technology. Journal of Radars has been included in domestic core journals and foreign Scopus, Ei and other databases, and was selected as ‘China's high-quality science and technology journals’, and ranked the first in the category of electronic technology and communication technology in the ‘Chinese Core Journals List (2023 Edition)’.