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Polar format algorithm with phase correction for bistatic SAR.

机译:用于双基地SAR的具有相位校正的极坐标格式算法。

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摘要

Bistatic radars are well known for their distinct advantages like spatial diversity and stealthness that monostatic radars cannot provide. Recently there is an increased interest in Bistatic Synthetic Aperture Radars.; Polar Format Algorithm (PFA) is a fast and very effective algorithm for Bistatic SAR imaging.; In this dissertation work, we have extended Polar format algorithm for Bistatic airborne SAR system. A generalized system model for Bistatic SAR data collection is introduced. One of the problems we encounter in reality is the non-linear flight path during SAR data collection. In our model we have explicitly considered these errors. From the received data, we first form the image by Polar Format algorithm. We then find the phase error due to the approximation used in PFA. Motion compensation for non-linear flight path is usually made using the Global Positioning System (GPS) data. We have shown that the approximation errors in PFA can be combined with motion errors and can be corrected together. Hence without any additional computations, the resultant image is free from phase errors due to PFA. (Abstract shortened by UMI.)
机译:双基地雷达以其独特的优势而闻名,例如单基地雷达无法提供的空间多样性和隐身性。最近,人们对双基地合成孔径雷达的兴趣增加了。极坐标格式算法(PFA)是一种用于双站SAR成像的快速有效的算法。本文对双基地机载SAR系统扩展了Polar格式算法。介绍了双站SAR数据收集的通用系统模型。我们现实中遇到的问题之一是SAR数据采集过程中的非线性飞行路径。在我们的模型中,我们明确考虑了这些错误。根据接收到的数据,我们首先通过Polar Format算法形成图像。然后,我们发现由于PFA中使用的近似值而导致的相位误差。非线性飞行路径的运动补偿通常使用全球定位系统(GPS)数据进行。我们已经表明,PFA中的近似误差可以与运动误差结合在一起,并且可以一起校正。因此,无需任何额外的计算,所得图像就不会因PFA而产生相位误差。 (摘要由UMI缩短。)

著录项

  • 作者

    Murugesan, Senthil Prasad.;

  • 作者单位

    State University of New York at Buffalo.;

  • 授予单位 State University of New York at Buffalo.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.S.
  • 年度 2005
  • 页码 76 p.
  • 总页数 76
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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