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Digital Beamforming for Spaceborne Reflector-Based Synthetic Aperture Radar, Part 1: Basic imaging modes
IEEE Geoscience and Remote Sensing Magazine ( IF 14.6 ) Pub Date : 2021-04-19 , DOI: 10.1109/mgrs.2021.3060543
Marwan Younis 1 , Felipe Queiroz de Almeida 1 , Michelangelo Villano 1 , Sigurd Huber 1 , Gerhard Krieger 1 , Alberto Moreira 1
Affiliation  

Deployable reflector antennas illuminated by a digital feed array enable spaceborne synthetic aperture radar (SAR) systems to image an ultrawide, continuous swath at a fine azimuth resolution. This is facilitated by the use of dedicated imaging modes and by multidimensional digital beamforming (DBF) techniques. This article is part 1 of a tutorial trilogy, where a focus is put on the required onboard functionality, operational techniques, and DBF aspects, for which a rigorous mathematical description is included. To maintain general validity, the functional implementation for the various modes is detailed, thus avoiding restricting the description to a specific realization. The reader is assumed to be familiar with the general concept of SAR and, otherwise, referred to the literature on the topic. The approach followed in the trilogy is to start with a basic imaging concept and then move to more advanced modes, thus successively increasing the complexity; the mathematical description follows the same approach.

中文翻译:

基于星载反射器的合成孔径雷达的数字波束成形,第 1 部分:基本成像模式

由数字馈源阵列照明的可展开反射器天线使星载合成孔径雷达 (SAR) 系统能够以精细的方位分辨率对超宽、连续的条带进行成像。这是通过使用专用成像模式和多维数字波束成形 (DBF) 技术来实现的。本文是教程三部曲的第 1 部分,重点介绍所需的板载功能、操作技术和 DBF 方面,其中包含严格的数学描述。为了保持一般有效性,对各种模式的功能实现进行了详细说明,从而避免将描述限制在特定实现上。假定读者熟悉 SAR 的一般概念,否则,请参阅有关该主题的文献。三部曲所遵循的方法是从基本的成像概念开始,然后转向更高级的模式,从而依次增加复杂性;数学描述遵循相同的方法。
更新日期:2021-04-19
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