First Spaceborne Demonstration of Digital Beamforming for Azimuth Ambiguity Suppression
First Spaceborne Demonstration of Digital Beamforming for Azimuth Ambiguity Suppression
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DOI：
10.1109/tgrs.2012.2201947
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发表时间：
2013-01-01
影响因子：
8.2
通讯作者：
Krieger, Gerhard
中科院分区：
文献类型：
--
作者：
Kim, Jung-Hyo;Younis, Marwan;Krieger, Gerhard
在过去的几年中，使用多天线孔径与数字波束形成（DBF）相结合，已成为一个有前途的解决方案的基本限制，高分辨率和宽测绘带星载合成孔径雷达（SAR）成像受到关注。在本文中，我们提出了第一个星载实验的DBF技术的接收，使用TerraSAR-X双接收天线模式。对于这个实验，我们实现了一个DBF模块，它包括作为数字波束形成器的重建滤波器和用于校准和通道平衡的相关信号处理。实验结果表明DBF具有成功的模糊度抑制能力，并验证了DBF在未来和当前先进SAR系统中的高潜力。
Over the past years, the use of multiple antenna apertures combined with digital beamforming (DBF) has been spotlighted as a promising solution for the fundamental restriction for high-resolution and wide-swath spaceborne synthetic aperture radar (SAR) imaging. In this paper, we present the first spaceborne experiment of a DBF technique on receive, using the TerraSAR-X dual receive antenna mode. For this experiment, we implemented a DBF module, which includes the reconstruction filter as a digital beam former and associated signal processing for calibration and channel balancing. The experimental results exhibit the successful ambiguity suppression capability of the DBF and validate the high potential of the DBF both for advanced future and current SAR systems.