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。
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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
雷达学报 Physics and Astronomy-Instrumentation
CiteScore
4.10
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0.00%
发文量
882
期刊介绍: Information not localized
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