Volume 6 Issue 4
Sep.  2017
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Article Navigation >  Journal of Radars  > 2017  >  6(4): 368-375
Tang Jiangwen, Deng Yunkai, Wang Robert, Zhao Shuo, Li Ning. High-resolution Slide Spotlight SAR Imaging by BP Algorithm and Heterogeneous Parallel Implementation[J]. Journal of Radars, 2017, 6(4): 368-375. doi: 10.12000/JR16053
Citation: Tang Jiangwen, Deng Yunkai, Wang Robert, Zhao Shuo, Li Ning. High-resolution Slide Spotlight SAR Imaging by BP Algorithm and Heterogeneous Parallel Implementation[J]. Journal of Radars, 2017, 6(4): 368-375. doi: 10.12000/JR16053
shu

High-resolution Slide Spotlight SAR Imaging by BP Algorithm and Heterogeneous Parallel Implementation

DOI: 10.12000/JR16053 CSTR: 32380.14.JR16053
  • 1.

    ①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)

  • 2.

    (University of Chinese Academy of Sciences, Beijing 100049, China)

Funds:

The National Natural Science Foundation of China (61172122), One Hundred Person Project of the Chinese Academy of Sciences (61422113)

  • Received Date: 2016-03-09
  • Rev Recd Date: 2016-05-04
  • Publish Date: 2017-08-28
    Abstract
  • High-resolution synthetic aperture radar presents a significant challenge to imaging algorithms and computing power.Slide spotlight is an important mode that has both high resolution and wide azimuth swath. Generally,in the slide spotlight mode,the performance of conventional frequency domain imaging algorithms degrades because of orbit curvature,the time-variant azimuth chirp rate,and other factors.We adopt the Back-Projection (BP) algorithm in this study to counteract this limitation.We also propose a CPU/GPU heterogeneous BP algorithm to deal with the high computing complexity O (N3) of the BP algorithm.This heterogeneous BP algorithm makes full use of computing resources and accelerates imaging progress,and the design of a scheduling thread improves the flexibility of the algorithm.

     

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