한국군사과학기술학회지 (Journal of the Korea Institute of Military Science and Technology)

  • 제17권5호
  • /
  • Pages.680-687
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  • 2014
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  • 1598-9127(pISSN)
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  • 2636-0640(eISSN)
한국군사과학기술학회 (The Korea Institute of Military Science and Technology)
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PGA(Phase Gradient Autofocus)기반 ISAR영상 자동초점기법 성능개선

Improvement of ISAR Autofocusing Performance Based on PGA

  • 김관성 (국방과학연구소 제3기술연구본부) ;
  • 양은정 (국방과학연구소 제3기술연구본부) ;
  • 김찬홍 (국방과학연구소 제3기술연구본부) ;
  • 박성철 (국방과학연구소 제3기술연구본부)
  • Kim, Kwan Sung (The 3rd Research and Development Institute, Agency for Defense Development) ;
  • Yang, Eun Jung (The 3rd Research and Development Institute, Agency for Defense Development) ;
  • Kim, Chan Hong (The 3rd Research and Development Institute, Agency for Defense Development) ;
  • Park, Sung Chul (The 3rd Research and Development Institute, Agency for Defense Development)
  • 투고 : 2014.05.12
  • 심사 : 2014.09.19
  • 발행 : 2014.10.05
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초록

PGA(phase gradient autofocus) has been widely used to remove motion induced phase errors in the ISAR(inverse synthetic aperture radar) imaging. The critical process for the processing time and image quality is windowing stage in PGA. In this paper, the new method to determine window size based on polynomial least square approximation is proposed. Moreover, dominant range bins are selected for efficient phase error estimation, which improve image quality and speed up convergence. The simulation results show that the proposed algorithm provides high quality ISAR images while computational efficiency of inherent PGA is retained.

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참고문헌

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