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Performance Improvement of Time-Differenced Carrier Phase Measurement-Based Integrated GPS/INS Considering Noise Correlation

1
School of Mechanical and Aerospace Engineering and the Institute of Advanced Aerospace Technology, Seoul National University, Seoul 08826, Korea
2
Korea Aerospace Research Institute (KARI), Daejeon 34133, Korea
3
Ecole Nationale de l’Aviation Civile (ENAC), 31400 Toulouse, France
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(14), 3084; https://doi.org/10.3390/s19143084
Received: 20 June 2019 / Revised: 10 July 2019 / Accepted: 12 July 2019 / Published: 12 July 2019
(This article belongs to the Collection Positioning and Navigation)
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Abstract

In this study, we combined a time-differenced carrier phase (TDCP)-based global positioning system (GPS) with an inertial navigation system (INS) to form an integrated system that appropriately considers noise correlation. The TDCP-based navigation system can determine positions precisely based on high-quality carrier phase measurements without difficulty resolving integer ambiguity. Because the TDCP system contains current and previous information that violate the format of the conventional Kalman filter, a delayed state filter that considers the correlation between process and measurement noise is utilized to improve the accuracy and reliability of the TDCP-based GPS/INS. The results of a dynamic simulation and an experiment conducted to verify the efficacy of the proposed system indicate that it can achieve performance improvements of up to 70% and 60%, respectively, compared to the conventional algorithm. View Full-Text
Keywords: GPS/INS; time-differenced carrier-phase; noise correlation GPS/INS; time-differenced carrier-phase; noise correlation
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Kim, J.; Kim, Y.; Song, J.; Kim, D.; Park, M.; Kee, C. Performance Improvement of Time-Differenced Carrier Phase Measurement-Based Integrated GPS/INS Considering Noise Correlation. Sensors 2019, 19, 3084.

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