基于多个角度约束的距离模糊抑制方法
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摘要
针对合成孔径雷达采用脉内扫描方式获取宽测绘带时产生的距离模糊问题,本文提出一种多个角度约束的距离模糊抑制方法,利用天线得到的空域多自由度,采用多个角度约束的自适应波束形成解距离模糊,当存在天线阵元位置误差时,该方法仍具有一定的稳健性,能够实现较好的解模糊性能,并通过仿真进行了验证。
As the intra-pulse scanning in SAR leads to range ambiguity,an innovative range ambiguity suppression method is proposed based on multiple look-direction constraints in this paper.Through the adaptive beamforming method by using more information of spatial domain,this method can resolve the problem of performance degradation caused by array displacement,which provides a great range ambiguity suppression effect.The effectiveness is verified with computer-based simulations.
As the intra-pulse scanning in SAR leads to range ambiguity,an innovative range ambiguity suppression method is proposed based on multiple look-direction constraints in this paper.Through the adaptive beamforming method by using more information of spatial domain,this method can resolve the problem of performance degradation caused by array displacement,which provides a great range ambiguity suppression effect.The effectiveness is verified with computer-based simulations.
引文
[1] ZHANG S X, XING M D, XIA X G, et al. Robust clutter suppression and moving target imaging approach for multichannel in azimuth high-resolution and wide-swath synthetic aperture radar[J].IEEE Transactions on Geoscience and Remote Sensing, 2015, 53(2):687-709.
[2] XU W, DENG Y K, WANG R. Multichannel Synthetic Aperture Radar Systems with a Planar Antenna for Future Spaceborne Microwave Remote Sensing[J]. IEEE Aerospace&Electronic Systems Magazine, 2012, 27(12):26-30.
[3] KRIEGER G,GEBERT N,MOREIRA A.Unambiguous SAR signal reconstruction from nonuniform displaced phase center sampling[J].IEEE Geoscience and Remote Sensing Letters, 2004, 1(4):260-264.
[4]武其松,邢孟道,刘保昌,保铮.面阵MIMO-SAR大测绘带成像[J].电子学报, 2010, 04:817-824.WU Q S, XING M D, LIU B C, BAO Z. Wide swath imaging with the plane-array MIMO-SAR system[J]. Acta Electronica Sinica. 2010, 04:817-824.
[5]保铮,邢孟道,王彤.雷达成像技术[M].北京:电子工业出版社, 2005:174-176.BAO Z, XING M D, WANG T. Imaging of the radar[M]. Beijing:.publishing company of Electronic Industries, 2005:174-176.
[2] XU W, DENG Y K, WANG R. Multichannel Synthetic Aperture Radar Systems with a Planar Antenna for Future Spaceborne Microwave Remote Sensing[J]. IEEE Aerospace&Electronic Systems Magazine, 2012, 27(12):26-30.
[3] KRIEGER G,GEBERT N,MOREIRA A.Unambiguous SAR signal reconstruction from nonuniform displaced phase center sampling[J].IEEE Geoscience and Remote Sensing Letters, 2004, 1(4):260-264.
[4]武其松,邢孟道,刘保昌,保铮.面阵MIMO-SAR大测绘带成像[J].电子学报, 2010, 04:817-824.WU Q S, XING M D, LIU B C, BAO Z. Wide swath imaging with the plane-array MIMO-SAR system[J]. Acta Electronica Sinica. 2010, 04:817-824.
[5]保铮,邢孟道,王彤.雷达成像技术[M].北京:电子工业出版社, 2005:174-176.BAO Z, XING M D, WANG T. Imaging of the radar[M]. Beijing:.publishing company of Electronic Industries, 2005:174-176.