Volume 8 Issue 1
Mar.  2019
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Article Navigation >  Journal of Radars  > 2019  >  8(1): 64-72
WANG Chao, WANG Yanfei, LIU Chang, et al. A new approach to range cell migration correction for ground moving targets in high-resolution SAR system based on parameter estimation[J]. Journal of Radars, 2019, 8(1): 64–72. doi: 10.12000/JR18054
Citation: WANG Chao, WANG Yanfei, LIU Chang, et al. A new approach to range cell migration correction for ground moving targets in high-resolution SAR system based on parameter estimation[J]. Journal of Radars, 2019, 8(1): 64–72. doi: 10.12000/JR18054
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A New Approach to Range Cell Migration Correction for Ground Moving Targets in High-resolution SAR System Based on Parameter Estimation

DOI: 10.12000/JR18054
  • ①.

    Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China

  • ②.

    University of Chinese Academy of Sciences, Beijing 100049, China

Funds:  The National Key Research and Development Program of China (2017YFB0503001), The National Natural Science Foundation of China (61471340)
More Information
  • Corresponding author: WANG Chao, wangchao_thu@163.com
  • Received Date: 2018-07-09
  • Rev Recd Date: 2018-11-19
    • Available Online: 2018-11-30
  • Publish Date: 2019-02-28
    Abstract
  • Range Cell Migration Correction (RCMC) represents an important advance in moving target imaging in the airborne single antenna high-resolution SAR system. In this paper, we propose a new four-step RCMC approach combined with parameter estimation that overcomes the drawbacks of high computation and low accuracy in high-resolution. First, we use the Hough transform and the energy balancing method to estimate the range velocity and correct the range walk. Next, we perform a range curvature correction in the range-Doppler domain by using the initial Doppler rate. Thirdly, we accurately estimate the Doppler rate using Map-drift technology. Finally, we correct the residual range curvature by the accurate Doppler rate. Compared with traditional algorithms, the proposed method requires less computation and is robust in the high-resolution SAR system. In this paper, we present a mathematical model and validate its effectiveness using both simulation and real data.

     

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