전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제60권12호
  • /
  • Pages.2318-2325
  • /
  • 2011
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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다중경로 환경에서 형상필터를 이용한 CDGPS 성능 향상 기법

Improving the Performance of CDGPS using the Shaping Filter on Multipath

  • 조성룡 (충남대 공과대학 전자공학과) ;
  • 한영훈 (충남대 공과대학 전자공학과) ;
  • 최헌호 (충남대 공과대학 전자공학과) ;
  • 허문범 (한국항공우주연구원) ;
  • 박찬식 (충북대 전자정보대학 제어로봇공학과) ;
  • 이상정 (충남대 공과대학 전자공학과)
  • 투고 : 2011.09.20
  • 심사 : 2011.11.16
  • 발행 : 2011.12.01
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초록

The quality of float solution deeply influences the performance of CDGPS because the theories being used in the integer ambiguity resolution method are derived under the assumption of AWGN. But in real world, the properties of noises are far from AWGN, especially when multipath are concerned. It results in the bias in float solution which affects the success rate of integer ambiguity and the precision of position in CDGPS. This paper designs an augmented Kalman filter using shaping filter and Kalman filter for the performance improvement of CDGPS on multipath. The experimental results with real measurements show that the correct integer ambiguity is always found while the success rates of WLSQ and ordinary Kalman filter are 5% and 18%, respectively. Eventually, the position accuracy is also improved by using the proposed algorithm.

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참고문헌

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