基于啁啾缩放算法的分数阶OAM涡旋SAR成像

IF 1.6 4区地球科学 Q3 ASTRONOMY & ASTROPHYSICS

Radio Science Pub Date : 2025-03-01 DOI:10.1029/2024RS008112

Liu Yu;Du Yongxing;Li Baoshan;Qin Ling;Li Chenlu

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引用次数: 0

摘要

涡旋电磁波携带轨道角动量。在SAR成像技术中，涡流电磁波结合雷达平台运动提供的多普勒信息，可以实现更高分辨率的目标成像。本文研究了分数阶OAM涡旋SAR成像。首先，建立侧视条形SAR成像模型；然后，推导了分数阶OAM的散射回波方程。最后，利用Chirp缩放算法对高斯信噪比下的多点目标和单点目标进行了成像仿真。实验结果表明，与整数阶OAM涡旋SAR成像相比，本文的分数阶OAM涡旋SAR成像在多目标和噪声环境下具有更强的鲁棒性，证明了分数阶涡旋SAR成像的有效性。

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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Fractional OAM vortex SAR imaging based on chirp scaling algorithm

Vortex electromagnetic wave carries orbital angular momentum. Combined with Doppler information provided by radar platform movement, vortex electromagnetic wave can achieve higher resolution target imaging in SAR Imaging technology. In this paper, fractional order OAM vortex SAR imaging is studied. Firstly, the side-looking strip SAR imaging model is established. Then, the scattering echo equation of fractional order OAM is derived. Finally, the imaging simulation of multi-point target and single point target under Gaussian SNR is carried out by Chirp Scaling algorithm. The experimental results show that compared with the integer order OAM Vortex SAR Imaging, the fractional order OAM Vortex SAR Imaging in this paper has stronger robustness in Multi-target and Noise environment, which proves the effectiveness of the fractional order Vortex SAR Imaging.

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来源期刊

Radio Science 工程技术-地球化学与地球物理

CiteScore

3.30

自引率

12.50%

发文量

112

审稿时长

1 months

期刊介绍： Radio Science (RDS) publishes original scientific contributions on radio-frequency electromagnetic-propagation and its applications. Contributions covering measurement, modelling, prediction and forecasting techniques pertinent to fields and waves - including antennas, signals and systems, the terrestrial and space environment and radio propagation problems in radio astronomy - are welcome. Contributions may address propagation through, interaction with, and remote sensing of structures, geophysical media, plasmas, and materials, as well as the application of radio frequency electromagnetic techniques to remote sensing of the Earth and other bodies in the solar system.