捷变PRF技术在斜视聚束SAR中的应用

罗绣莲 徐伟 郭磊

罗绣莲, 徐伟, 郭磊. 捷变PRF技术在斜视聚束SAR中的应用[J]. 雷达学报, 2015, 4(1): 70-77. doi: 10.12000/JR14149
引用本文: 罗绣莲, 徐伟, 郭磊. 捷变PRF技术在斜视聚束SAR中的应用[J]. 雷达学报, 2015, 4(1): 70-77. doi: 10.12000/JR14149
Luo Xiu-lian, Xu Wei, Guo Lei. The Application of PRF Variation to Squint Spotlight SAR[J]. Journal of Radars, 2015, 4(1): 70-77. doi: 10.12000/JR14149
Citation: Luo Xiu-lian, Xu Wei, Guo Lei. The Application of PRF Variation to Squint Spotlight SAR[J]. Journal of Radars, 2015, 4(1): 70-77. doi: 10.12000/JR14149

捷变PRF技术在斜视聚束SAR中的应用

doi: 10.12000/JR14149
基金项目: 

自然科学基金青年基金(61401431)资助课题

详细信息
    作者简介:

    罗绣莲(1987-),女,四川广安人,博士研究生,研究方向为高分宽幅合成孔径雷达信号处理。 徐伟(1984-),副研究员,研究方向为新体制合成孔径雷达系统设计及信号处理。 郭磊(1988-),博士研究生,研究方向为高分宽幅星载合成孔径雷达系统设计。

The Application of PRF Variation to Squint Spotlight SAR

  • 摘要: 该文关注一种新型的斜视聚束SAR模式,其采用捷变脉冲重复频率(PRF)技术来增加高分辨率成像时的距离向测绘带宽。聚束SAR利用波束旋转来增加方位向分辨率。然而,高分辨率和大斜视的成像要求会导致较大的距离单元徙动(RCM)。PRF固定不变(即接收窗固定)时,为了保证方位向数据获取时间内所有的回波脉冲能被完整接收,距离向测绘带宽对应的时间宽度必须小于接收窗宽度。为了消除RCM对测绘带宽的影响,该文将PRF沿着方位向时间连续地改变(捷变),使得接收窗的变化与瞬时斜距的变化一致。首先推导了PRF的变化规律,然后利用一种改进的后向投影算法(BPA)对回波数据成像,最后通过仿真实验验证这种SAR模式及对应的成像算法。

     

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出版历程
  • 收稿日期:  2014-12-05
  • 修回日期:  2015-03-19

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