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논문 기본 정보

자료유형
학술저널
저자정보
Mamoun F. Abdel-Hafez (American University of Sharjah) Dae Je Kim (현대로템주식회사) Eunsung Lee (한국항공우주연구원) Sebum Chun (마이크로인피니티) Young Jae Lee (건국대학교) Taesam Kang (건국대학교) Sangkyung Sung (건국대학교)
저널정보
대한전기학회 International Journal of Control Automation and Systems International Journal of Control Automation and System Vol.6 No.4
발행연도
2008.8
수록면
534 - 543 (10page)

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초록· 키워드

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To use the Global Positioning System (GPS) carrier phase measurement for precise positioning, the integer ambiguities at the early stage of most algorithms must be determined. Furthermore, if a precise positioning is to be applied to real time navigation, fast determination and validation methods for integer ambiguity are essential. In this paper, the Wald test that simultaneously determines and validates integer ambiguities is used with assistance of the Inertial Navigation System (INS) to improve its performance. As the Wald test proceeds, it assigns a higher probability to the candidate that is considered to be true at each time step. The INS information is added during the Wald test process. Large performance improvements were achieved in convergence time as well as in requiring fewer observable GPS satellites. To test the performance improvement of the Wald test with the INS information, experimental tests were conducted using a ground vehicle. The vehicle moved in a prescribed trajectory and observed seven GPS satellites. To verify the effect of the INS information on the Wald test, the convergence times were compared with cases that considered the INS information and cases that did not consider the INS information. The results show that the benefits of using the INS were emphasized as fewer GPS satellites were observable. The performance improvement obtained by the proposed algorithm was shown through the fast convergence to the true hypothesis when using the INS measurements.

목차

Abstract
1. INTRODUCTION
2. THE WALD TEST
3. GPS/INS INTEGRATED SYSTEM
4. EXPERIMENTAL RESULTS
5. CONCLUSIONS
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