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Bistatic inverse synthetic aperture radar imaging

机译:双基地逆合成孔径雷达成像

摘要

A bistatic synthetic aperture radar (SAR) imaging system and method include: combining each radar return pulse from airborne radar platforms with a sinusoid; deskewing each reduced radar return pulse; estimating motion parameters based on a maximum likelihood estimation (MLE); performing MLE motion correction to generate motion-corrected radar return pulses; acquiring position and velocity estimates of the airborne radar platforms and scattering locations; defining bistatic range and velocity vectors; defining new bistatic range and velocity vectors in a new set of orthogonal axes; projecting vector distance differences between the radar scattering locations along the new set of orthogonal axes to generate new range and velocity measurements along the new set of orthogonal axes; converting the new range and velocity measurements to map Doppler frequency into cross-range; and forming a bistatic SAR image in range and cross-range based on cross-range extent derived from the Doppler frequency mapping.
机译:双基地合成孔径雷达(SAR)成像系统和方法包括:将来自机载雷达平台的每个雷达返回脉冲与正弦波结合;对每个减小的雷达返回脉冲进行偏斜校正;基于最大似然估计(MLE)估计运动参数;进行MLE运动校正以生成经过运动校正的雷达返回脉冲;获取机载雷达平台和散射位置的位置和速度估计;定义双基地范围和速度矢量;在一组新的正交轴中定义新的双站范围和速度矢量;沿新的正交轴投影雷达散射位置之间的矢量距离差,以沿新的正交轴生成新的距离和速度测量;转换新的距离和速度测量值,以将多普勒频率映射到跨范围;并基于从多普勒频率映射得到的跨范围程度,在范围和跨范围内形成双基地SAR图像。

著录项

  • 公开/公告号US9335409B2

    专利类型

  • 公开/公告日2016-05-10

    原文格式PDF

  • 申请/专利权人 RAYTHEON COMPANY;

    申请/专利号US201313847764

  • 发明设计人 THEAGENIS J. ABATZOGLOU;JOHAN E. GONZALEZ;

    申请日2013-03-20

  • 分类号G01S13/89;G01S13/90;G01S7/295;G01S13/58;

  • 国家 US

  • 入库时间 2022-08-21 14:28:28

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