Journal of the Institute of Electronics Engineers of Korea SC (전자공학회논문지SC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Data Wipe Off Method Using a Carrier Phase Discriminator for Deeply Coupled GPS/INS Integrated Navigation Systems

반송파 위상 판별기를 이용한 심층 결합 GPS/INS 통합 항법 시스템용 Data Wipe Off 방법

  • Jeong, Ho-Cheol (Department of Electronics Engineering, Chungnam National University) ;
  • Kim, Jeong-Won (Korea Aerospace Research Institute) ;
  • Hwang, Dong-Hwan (School of Electrical and Computer Engineering, Chungnam National University) ;
  • Lee, Sang-Jeong (School of Electrical and Computer Engineering, Chungnam National University)
  • Published : 2008.11.25
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Abstract

In the deeply coupled GPS/INS integrated systems, if the integration filter update period is longer than the period of GPS navigation data, the loss of correlation values occurs due to the bit transition. This problem can be resolved when data wipe off(DWO) is used. However, general DWO methods requires heavy computation or cannot be applied continuously. This paper proposes an effective DWO method using carrier phase discriminator In order to show validity of the proposed method, simulations were carried out. The simulation results show that the data bit is accurately estimated and conform that the loss of correlation values and the error of code phase is small.

심층결합 GPS/MS 통합 항법 시스템에서 통합 필터의 갱신 주기가 GPS 신호의 데이터 비트 주기보다 길면 비트 반전에 의해서 상관값 손실이 생기게 된다. 상관값은 항법 결과에 직접적인 영향을 미치므로 이 문제를 해결하기 위해 데이터 비트를 제거하는 DWO 방법이 필요하다. 그러나 일반적인 DWO 방법은 계산량 증가 또는 연속성에 문제가 있다. 본 논문에서는 반송파 판별기를 이용하는 효율적인 DWO 방법을 제안한다. 모의 실험을 통해 제안한 방법을 적용 할 경우 정확하게 데이터 비트를 추정하는 것을 보이고 통합 필터의 갱신주기가 증가하더도 상관값 손실이 작고 코드위상 판별기의 출력 오차가 작은 것을 확인 하였다.

Keywords

References

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