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大场景高分辨率星载聚束SAR修正ω-k算法 被引量：6

A Modifiedω-k Algorithm for Wide-field and High-resolution Spaceborne Spotlight SAR
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摘要 基于等效斜视模型,该文给出了一种大场景高分辨率星载聚束SAR修正ω-k算法。针对大场景高分辨率星载SAR精确成像的需要,利用等效速度沿距离向的变化规律,改进了经典ω-k算法中的Stolt插值变换,实现了考虑等效速度的距离空变性的精确距离徙动校正。基于改进的Stolt插值,推导得到了沿距离向的成像指标一致的修正ω-k成像算法。仿真结果验证了该文成像算法的有效性。 Based on the equivalent-squint range model,an modified algorithm for wide-field and high-resolution spaceborne spotlight SAR is proposed.In order to process the wide field and high resolution spaceborne SAR data precisely,by taking use of the relationship between the range and the equivalent velocity,the Stolt mapping of the classical algorithm is modified.The modified Stolt mapping takes into account for the range-dependence of the equivalent velocity,so that the range cell migration is corrected accurately.Based on the modified Stolt mapping,the modified algorithm is presented,which guarantees the uniform image quality along range and is validated by the simulation.
作者 刘燕 孙光才 邢孟道
机构地区 西安电子科技大学雷达信号处理重点实验室
出处 《电子与信息学报》 EI CSCD 北大核心 2011年第9期2108-2113,共6页 Journal of Electronics & Information Technology
基金 国家自然科学基金重大项目(60890072)资助课题
关键词 星载聚束SAR 等效斜视模型 修正ω-k算法 等效速度 Stolt插值 Spaceborne spotlight SAR Equivalent-squint range model Modified algorithm Equivalent velocity Stolt mapping
分类号 TN959.74 [电子电信—信号与信息处理]
  • 相关文献

参考文献13

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二级参考文献20

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共引文献7

同被引文献72

  • 1唐禹,王岩飞,张冰尘.滑动聚束SAR成像模式研究[J].电子与信息学报,2007,29(1):26-29. 被引量：29
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  • 9Prats P, Scheiber R, Mittermayer J, et al: Processing of sliding spotlight and TOPS SAR data using baseband azimuth scaling[J]. IEEE Transactions on Geoscience and Remote Sensing, 2010, 48(2): 770-780.
  • 10Kim J H, Younis M, Prats-Iraola P, et al: First spaceborne demonstration of digital beamforming for azimuth ambiguity suppression[J]. IEEE Transactions on Geoseience and Remote Sensing, 2013, 51(1): 579-590.

引证文献6

二级引证文献35

电子与信息学报
2011年 第9期

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