3D imaging performance analysis of multi-baseline Circular GBSAR

2019 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR) Pub Date : 2019-11-01 DOI:10.1109/apsar46974.2019.9048514

Yun Lin, Qiming Zhang, Yanping Wang, Yang Li, Yang Song, Yutong Liu

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Abstract

Traditional linear GBSAR can only image in the range-azimuth plane. It can't obtain elevation information of the target. Circular GBSAR is a new GBSAR model. Due to the advantage of resolution in the vertical direction, circular GBSAR can acquire the 3D image. However, the azimuth section of the single-baseline circular GBSAR image has high side lobes. In this paper, a multi-baseline circular GBSAR 3D imaging system using multiple antennas is proposed. Multiple antennas are fixed to the rotating arm, the rotating arm rotates in a vertical plane to form a circular synthetic aperture, and the antenna beam points directly in front. Multi-baseline circular GBSAR model can effectively reduce the side lobe of the azimuth section of the SAR image. In this paper we analyzed the effect of the multi-baseline circular GBSAR model on reducing the side lobes of the azimuth section and the special variation of point target imaging at different locations. By the simulation experiments, the 3D resolution ability of the multi-baseline circular GBSAR for different point targets is verified.

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多基线圆形GBSAR三维成像性能分析

传统的线性GBSAR只能在距离-方位平面上成像。它无法获取目标的仰角信息。圆形GBSAR是一种新的GBSAR模型。圆形GBSAR由于具有垂直分辨率的优势，可以获取三维图像。然而，单基线圆形GBSAR图像的方位角部分存在高侧瓣。提出了一种基于多天线的多基线圆形GBSAR三维成像系统。多个天线固定在旋转臂上，旋转臂在垂直平面内旋转形成圆形合成孔径，天线波束直指前方。多基线圆形GBSAR模型可以有效地减小SAR图像方位角部分的旁瓣。本文分析了多基线圆形GBSAR模型对降低方位角剖面侧叶的影响以及不同位置点目标成像的特殊变化。通过仿真实验，验证了多基线圆形GBSAR对不同点目标的三维分辨能力。

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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2019 6th Asia-Pacific Conference on Synthetic Aperture Radar (APSAR)

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