双滑动聚焦双基地合成孔径雷达的有效聚焦方法

Feifei Yan, Wenge Chang
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引用次数: 1

摘要

星载-机载双基地合成孔径雷达(SA-BiSAR)以卫星为发射机,以机载平台为接收机,获取景物的后向散射回波。为了使光束重叠区域最大化,最近提出了一种双滑动聚焦模式。通常要求接收机工作在反滑动聚光模式(TOPS模式),发射机工作在滑动聚光模式。由于系统工作在双滑动聚焦模式下,成像几何形状在距离和方位角尺寸上存在严重的空间差异。基于啁啾标度法和非线性啁啾标度成像算法,提出了一种SA-BiSAR系统的成像方法。最后,通过多个仿真结果验证了所提出的成像算法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An efficient approach for double sliding spotlight bistatic synthetic aperture radar focusing
With a satellite as a transmitter, spaceborne-airborne bistatic synthetic aperture radar (SA-BiSAR) uses an airborne platform as a receiver to get the back scatting echo of the scene. In order to maximize the beam-overlapping region, a double sliding spotlight mode is proposed recently. It is often required that the receiver operate in inverse sliding spotlight mode (TOPS mode) and the transmitter work in sliding spotlight mode. As the system working in double sliding spotlight mode, the imaging geometry suffers from severe spatial variance in range and azimuth dimensions. Based on chirp scaling method and nonlinear chirp scaling (NLCS) imaging algorithm, an imaging method of SA-BiSAR system is proposed in this paper. Finally, the proposed imaging algorithm is validated by several simulation results.
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