한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

  • 제37권6C호
  • /
  • Pages.453-461
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  • 2012
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  • 1226-4717(pISSN)
  • /
  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
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진폭 변조 거리 측정 시스템에 적용 가능한 개선된 위상 추정 기법

An Improved Phase Estimation Method for AM Range Measurement System

  • 김대중 (서강대학교 전자공학과 CAD & ES 연구실) ;
  • 오택환 (LIG넥스원(주) Maritime연구소) ;
  • 황선영 (서강대학교 전자공학과 CAD & ES 연구실)
  • 투고 : 2012.04.23
  • 심사 : 2012.05.30
  • 발행 : 2012.06.30
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초록

본 논문에서는 진폭 변조 거리 측정 시스템에 적용 가능한 개선된 위상 추정 기법을 제안한다. 기존 위상 측정 방법은 이동 목표물의 도플러 천이에 의해 위상 측정 오차가 발생한다. 제안된 위상 추정 기법은 도플러 천이에 대해 적응 도플러 보정(Adaptive Doppler Correction)을 사용하여 위상 추정 오차를 보정하므로 거리 측정 정확도를 향상 시킬 수 있다. 모의실험 결과 도플러 주파수 천이 보정은 기존 방식보다 94.7% 향상된 성능을 보이며, 거리 측정 정확도는 50%로 향상되었다. 음향 수조에서는 오차가 7.7cm로 추정되어 해양 환경에서 음파를 이용하여 거리 추정에도 적용 가능함을 확인하였다.

This paper proposes an improved phase estimation method for AM(Amplitude Modulation) range measurement system. The previous phase estimation method induces errors by Doppler shift of a moving target. The proposed method compensates phase estimation error through the ADC(Adaptive Doppler Correction) to take the Doppler shift, thus can improve distance measurement accuracy. When compared with the previous method through simulation results, the Doppler shift compensation and accuracy are improved by 94.7% and 50%, respectively. Target distance error in an acoustic tank is estimated to be 7.7cm, which confirms that the proposed method can be used to estimate the distance in the marine environment.

키워드

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