A Novel Spectrum Reconstruction Algorithm for High Resolution and Wide Swath Space-borne SAR

摘要：

The displaced phase center multi-beam technique enables a wide-swath Synthetic Aperture Radar (SAR) with high azimuth resolution. However, the pulse repetition frequency, sensor velocity and antenna size underlie a stringent timing requirement and any deviation will result in a non-uniform sampling in space domain. The paper derives an innovative frequency domain reconstruction algorithm, which enables a recovery of the unambiguous Doppler spectrum also in case of a non-uniform sampling. Theoretical analysis shows the swath and resolution can be simultaneously increased M (the number of subaperture) times. The potential of the algorithm when applied to the DPC SAR systems with 7 receive subapertures is demonstrated and the spurious image from the non-uniform sampling is suppressed to below -60dB. In addition, the fast algorithm of reconstruction in frequency domain is proposed.

关键词： displaced phase center (DPC) subaperture high resolution SAR wide swath SAR nonuniform sampling uniform spectrum reconstruction

作者: Xinwei WU XuJin ZHANG Changyao ZHANG Yi JIANG

作者单位: China Electronic Technology Corporation No.38 Research Institute,Hefei 230031,China;Artillery Academ China Electronic Technology Corporation No.38 Research Institute,Hefei 230031,China Artillery Academy of PLA,Hefei 230031,China

会议类型: 国际会议

会议名称: 首届亚太合成孔径雷达会议(1st Asian and Pacific Conference on Synthetic Aperture Radar Proceedings)

会议地点: 安徽黄山

会议语种:英文

在线出版日期: 2007-11-05（万方平台首次上网日期，不代表论文的发表时间）