한국항공우주학회지 (Journal of the Korean Society for Aeronautical & Space Sciences)

  • 제33권7호
  • /
  • Pages.59-69
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  • 2005
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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실시간 동적 위성항법을 위한 단일차분 위치영역 Hatch 필터의 설계

Designing Single-Differenced Position-Domain Hatch Filter for Real-Time Kinematic GNSS

  • 이형근 (한국항공대학교 전자정보통신컴퓨터공학부) ;
  • ;
  • 지규인 (건국대학교 전자공학과)
  • 발행 : 2005.07.01
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초록

본 논문에서는 위상평활화코드 기법에 기반한 실시간 동적 차분위성항법의 효율적인 구현을 위하여 위치영역 Hatch 필터를 새로이 제안하고 그 성능을 분석하였다. 제안된 위치영역 Hatch 필터는 기존의 거리영역 Hatch를 새로운 각도에서 해석하고 이를 연장하여 유도되었다. 시뮬레이션을 통하여 Hatch 이득이 Kalman 형 이득보다 더 효율적이며 또한 위성의 출몰이 빈번한 환경에서는 위치영역 Hatch 필터가 거리영역 Hatch 필터보다 유리함을 보였다.

A position domain Hatch filter is proposed as an efficient carrier-smoothed-code processing algorithm for real-time kinematic differential global satellite navigation systems. The well-known range domain Hatch filter is newly interpreted with a stochastical point of view. The interpretation result is extended to derive the position domain Hatch filter. By a covariance simulation, it is shown that Hatch gain is, in general, more efficient than Kalman-type gain in carrier-smoothed-code processing and the proposed position domain Hatch filter is more advantageous than the conventional range domain Hatch filter if the visible satellite constellation changes during the positioning task.

키워드

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