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中国科学院大学学报 ›› 2011, Vol. 28 ›› Issue (2): 217-222.DOI: 10.7523/j.issn.2095-6134.2011.2.012

• 论文 • 上一篇    下一篇

一种基于数字波束形成的抑制星载SAR距离模糊的方案

张永庆1,2, 雷宏1   

  1. 1. 中国科学院电子学研究所, 北京 100190;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2010-04-30 修回日期:2010-05-20 发布日期:2011-03-15

A novel scheme for restraining range ambiguity of spaceborne SAR based on digital beamforming

ZHANG Yong-Qing1,2, LEI Hong1   

  1. 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate University, Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-04-30 Revised:2010-05-20 Published:2011-03-15

摘要:

天线波束形成是改善星载合成孔径雷达(SAR)距离模糊的主要手段之一.提出一种宽零陷波束形成算法,该算法能够在星载SAR模糊区回波方向形成特定深度的宽零陷,从而对模糊区回波进行有效抑制.以一个星载SAR系统为实例,对该方案的性能进行了分析,仿真结果显示该方案的可行性和有效性.

关键词: 合成孔径雷达, 数字波束形成, 距离模糊, 空时自适应处理, 宽零陷

Abstract:

Beamforming is one of the main means for improving the spaceborne synthetic aperture radar(SAR). A broad null beamforming algorithm is proposed to form specified-depth null in the ambiguity regions in order to suppress the echo from those regions.The performance analysis of this scheme is given. Simulation results show efficiency and feasibility of the scheme.

Key words: SAR, digital beamforming, range ambiguity, STAP, sector nulling

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