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

Jungbeom Kim (1) , Younsil Kim (2) , Junesol Song (3) , Donguk Kim (1) , Minhuck Park (1) , Changdon Kee (1)

1 SNU - Seoul National University [Seoul]
2 KARI - Korea Aerospace Research Institute [Daejeon]
3 ENAC - Ecole Nationale de l'Aviation Civile

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.

Mots clés: GPS/INS; time-differenced carrier-phase; noise correlation

Domaines: Traitement du signal et de l'image [eess.SP]

Jungbeom Kim, Younsil Kim, Junesol Song, Donguk Kim, Minhuck Park, et al.. Performance Improvement of Time-Differenced Carrier Phase Measurement-Based Integrated GPS/INS Considering Noise Correlation. Sensors, 2019, 19 (14), pp.3084. ⟨10.3390/s19143084⟩. ⟨hal-02192467⟩