Entwurf und Analyse einer Vektor-Regelschleife für hochempfindliche GNSS Signalverfolgung
Final Report Abstract
The purpose of the DFG-VTL project was to design and implement a Vector-Tracking-Loop (VTL) for high sensitivity GNSS signal tracking, and then analyse its performance for various signal environments of a user receiver. In the first phase of the project, the system requirements and literature survey on previous works were performed. A vector tracking loop for high sensitivity GNSS signal tracking was investigated. All the relevant signal processing and navigation software of GNSS receivers were developed in a form of reconfigurable API software. Various signal tracking Kalman filter approaches were implemented and tested in a numerical simulation, and their performances were assessed in comparison with the conventional loop filter approach. Finally, a designed simple model of vector tracking loop was implemented and tested with various simulation environments. In the second phase of the project, the previous results obtained in the first phase were extended to a more dedicated subsystem level and also tested for high sensitivity GNSS signal tracking environments. An experimental software receiver was used as an implementation test-bed baseline to provide ultimate reconfigurability. The performance of designed vector tracking loop was analysed in terms of signal-to-noise ratio for various weak signal environments. Analytical method to analysis the performance of the designed vector tracking loop was developed under the assumption of the white noise characteristics. The tuning method for signal tracking Kalman filters was investigated. Also, the robustness of designed vector signal tracking loop software module was tested and analysed for a various user scenarios under strong signal fading that could occur in a car driving in urban canyon environment.
Publications
- “Effectiveness Analysis of Vector-Tracking-Loop in Signal Fading Environment,” Proceedings of the seventh ESA Workshop on Satellite Navigation User Equipment Technologies – NAVITEC2010, ESTEC, Noordwijk, The Netherlands, Dec. 8-9, 2010
J. H. Won, B. Eissfeller
- “Performance Comparison of Three Different Types of Nonlinear Kalman Filter Approach for a Vector-Based GNSS Signal Tracking Loop,” NAVIGATION: Journal of The Institute of Navigation, Vol. 57, No. 3, Fall 2010
J. H. Won, D. Dötterböck, B. Eissfeller
- “Implementation, Test and Validation of a Vector- Tracking-Loop with the ipex Software Receiver,” Proceedings of ION GNSS-2011, Portland, OR, Sept. 20-23, 2011
J. H. Won, and B. Eissfeller
- “Charateristics of Kalman Filter Approach for Signal Tracking Loop of GNSS Receiver,” Transactions on IEEE Aerospace and Electronics Systems, Vol. 48, No. 4, Oct. 2012
J. H. Won, T. Pany, B. Eissfeller
