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Two Dimensional Resolution Equalization Method in Image Domain for Airborne Multi-static SAR

机译：机载多静态SAR图像域二维分辨率均衡方法

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摘要

The resolution of bistatic SAR system is constrained by the signal bandwidth, distance, velocity and bistatic radar angle. The influence of topology structures and the strong coupling of echoes greatly limit the resolution of SAR images. And the problem of unbalanced two dimensional resolution brings difficulty and challenge to the target detection and recognition. Multi-static SAR can naturally form multiple pairs of bistatic SAR system and it fuses image information from multi-view by the design of topology structure to improve imaging resolution. To achieve optimal spatial resolution in all directions, the typical multi-static SAR geometric model is presented and the influence of topology structure on the two-dimensional resolution of bistatic and multi-static SAR is analyzed in this paper. Then, an equalization method to improve resolution for multi-static SAR is proposed. Finally, the simulation results validate the effectiveness of the proposed method.
机译：双基地SAR系统的分辨率受信号带宽，距离，速度和双基地雷达角度的限制。拓扑结构的影响和回波的强耦合极大地限制了SAR图像的分辨率。二维分辨率不平衡的问题给目标的检测和识别带来了困难和挑战。多静态SAR自然可以形成多对双基地SAR系统，并通过拓扑结构设计融合多视角的图像信息，从而提高成像分辨率。为了在各个方向上获得最佳的空间分辨率，提出了典型的多静态SAR几何模型，并分析了拓扑结构对双静态和多静态SAR二维分辨率的影响。然后，提出了一种提高多静态SAR分辨率的均衡方法。最后，仿真结果验证了该方法的有效性。

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