A Novel Phase Calibration Method for Dual-Channel CSAR-GMTI Processing

Ge Beibei; Fan Chongyi; An Daoxiang; Wang Wu; Zhou Zhimin; Chen Mingsheng

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A Novel Phase Calibration Method for Dual-Channel CSAR-GMTI Processing

机译：一种新型双通道CSAR-GMTI处理的相位校准方法

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摘要

Displaced phase center array (DPCA) and along-track interferometry (ATI) have been widely used for ground moving target indication (GMTI) in multi-channel circular synthetic aperture radar (CSAR) system. In ideal conditions, these methods can suppress background clutter effectively. However, the nonideal movement of platform may create a nonzero crab angle, which will induce a cross-track baseline offset and affect GMTI processing seriously. This letter analyzes the influence of crab angle on interferometric phase theoretically. Here, we propose a two-step phase calibration method to greatly improve the performance of CSAR-GMTI by eliminating the range-varying phase error. This method is independent of imaging and GMTI processing. Simulated and measured data results verify the correctness of the theoretical analysis and the validity of the proposed method.

机译：位移相位中心阵列（DPCA）和沿轨道干涉测量（ATI）已广泛用于多通道圆形合成孔径雷达（CSAR）系统中的地面移动目标指示（GMTI）。在理想的条件下，这些方法可以有效地抑制背景杂波。然而，平台的非抗性运动可以创建非零蟹角，这将引起跨轨基线偏移并严重影响GMTI处理。这封信在理论上分析了蟹角对干涉阶段的影响。在这里，我们提出了一种两步相位校准方法，通过消除范围变化的相位误差来大大提高CSAR-GMTI的性能。该方法与成像和GMTI处理无关。模拟和测量数据结果验证了理论分析的正确性和所提出的方法的有效性。

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来源
《IEEE Geoscience and Remote Sensing Letters》 |2020年第4期|636-640|共5页
作者
Ge Beibei; Fan Chongyi; An Daoxiang; Wang Wu; Zhou Zhimin; Chen Mingsheng;
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作者单位

Natl Univ Def Technol Coll Elect Sci & Technol Changsha 410073 Peoples R China;

Natl Univ Def Technol Coll Elect Sci & Technol Changsha 410073 Peoples R China;

Natl Univ Def Technol Coll Elect Sci & Technol Changsha 410073 Peoples R China;

Natl Univ Def Technol Coll Elect Sci & Technol Changsha 410073 Peoples R China;

Natl Univ Def Technol Coll Elect Sci & Technol Changsha 410073 Peoples R China;

Army Med Univ Dept Biomed Engn Chongqing 400000 Peoples R China;

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原文格式 PDF
正文语种 eng
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关键词
Calibration; Radar imaging; Radar tracking; Imaging; Radar antennas; Target tracking; Along-track interferometry (ATI); circular synthetic aperture radar (CSAR); crab angle; displaced phase center array (DPCA); phase calibration;

机译：校准;雷达成像;雷达跟踪;成像;雷达天线;目标跟踪;沿着轨道干涉测量法（ATI）;圆形合成孔径雷达（CSAR）;蟹角;移位阶段中心阵列（DPCA）;相位校准;相位校准;相位校准;相位校准;相位校准;相位校准;

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A Novel Phase Calibration Method for Dual-Channel CSAR-GMTI Processing

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