Volume 6 Issue 1
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Zhou Yejian, Zhang Lei, Wang Hongxian, Xing Mengdao. Performance Analysis on ISAR Imaging of Space Targets[J]. Journal of Radars, 2017, 6(1): 17-24. doi: 10.12000/JR16136
Citation: Zhou Yejian, Zhang Lei, Wang Hongxian, Xing Mengdao. Performance Analysis on ISAR Imaging of Space Targets[J]. Journal of Radars, 2017, 6(1): 17-24. doi: 10.12000/JR16136
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Performance Analysis on ISAR Imaging of Space Targets

doi: 10.12000/JR16136
  • ①.

    National Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China

  • ②.

    Collaborative Innovation Center of Information Sensing and Understanding at Xidian University,Xi’an 710071,China

Funds:  The National Natural Science Foundation of China (61301280, 61301293)
  • Received Date: 2016-12-01
  • Rev Recd Date: 2017-03-03
  • Publish Date: 2017-02-28
    Abstract
  • Usually, in traditional Inverse Synthetic Aperture Radar (ISAR) systems design and mode selection for space satellite targets, coherent integration gain in azimuth direction hardly can be analyzed, which depends on target’s motion. In this study, we combine the target orbit parameters to determine its motion relative to radar and deduce coherent integration equation in ISAR imaging to realize the selection of imaging intervals based on coherent integration, which can ensure the resolution in azimuth direction. Meanwhile, we analyze the influence of target orbit altitude to echo power and imaging Signal-to-Noise Ratio (SNR) that provides a new indicator for space observation ISAR systems design. The result of simulation experiment illustrates that with target orbit altitude increasing, coherent integration gain in azimuth direction of large-angular observation offsets the decreasing of imaging SNR in a degree, which provides a brand-new perspective for space observation ISAR systems and signal processing design.

     

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