The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Extraction of the JEM Component in the Observation Range of Weakly Present JEM Based on Complex EMD

복소 EMD를 이용한 미약한 JEM의 관측 범위에서 JEM 성분의 추출

  • Park, Ji-Hoon (Department of Electronic Engineering, Korea Advanced Institute of Science and Technology, KAIST) ;
  • Yang, Woo-Yong (Department of Electronic Engineering, Korea Advanced Institute of Science and Technology, KAIST) ;
  • Bae, Jun-Woo (Samsung Thales Ltd.) ;
  • Kang, Seong-Cheol (Department of Electronic Engineering, Korea Advanced Institute of Science and Technology, KAIST) ;
  • Kim, Chan-Hong (Agency for Defense Development) ;
  • Myung, Noh-Hoon (Department of Electronic Engineering, Korea Advanced Institute of Science and Technology, KAIST)
  • 박지훈 (한국과학기술원 전기 및 전자공학과) ;
  • 양우용 (한국과학기술원 전기 및 전자공학과) ;
  • 배준우 (삼성탈레스) ;
  • 강성철 (한국과학기술원 전기 및 전자공학과) ;
  • 김찬홍 (국방과학연구소) ;
  • 명로훈 (한국과학기술원 전기 및 전자공학과)
  • Received : 2014.02.27
  • Accepted : 2014.04.22
  • Published : 2014.06.30
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Abstract

Jet engine modulation(JEM) is a frequency modulation phenomenon of the radar signal induced by electromagnetic scattering from a rotating jet engine turbine. Although JEM can be used as a representative radar target recognition method by providing unique information on the target, its recognition performance may be degraded in the observation range of weakly present JEM. Hence, this paper presents a method for extracting the JEM component by decomposing the radar signal into intrisic mode functions(IMFs) via complex empirical mode decomposition(CEMD) and by combining them based on signal eccentricity. Its application to various signals demonstrated that the proposed method improved the clarity of JEM analysis and could extend the effective observation range of JEM.

제트엔진 변조(Jet Engine Modulation: JEM)는 회전하는 제트엔진 터빈으로부터의 전자기 산란에 따른 레이더 신호의 주파수 변조 현상이다. JEM은 표적의 고유한 정보를 제공하여 대표적인 레이더 표적 인식 수단으로 활용되나, JEM 성분이 미약하게 존재하는 레이더 관측 범위에서는 JEM에 의한 레이더 표적 인식 성능이 저하될 수 있다. 이에 본 논문에서는 복소 신호의 경험적인 모드분리법(Complex Empirical Mode Decomposition: CEMD)를 이용하여 레이더 신호를 여러 기본성분인 고유 모드 함수(Intrinsic Mode Function: IMF)로 분리하고, 신호의 이심률을 기반으로 이들 IMF를 조합하는 근거를 제공하여 JEM 성분을 추출하는 기법을 제시한다. 다양한 신호에 대한 적용 결과를 통하여 제안된 기법이 JEM의 명확성을 개선하는 한편, JEM 해석의 유효 관측 범위를 확장시킬 수 있음을 입증하였다.

Keywords

References

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