Abstract
This paper proposes moving set-point state feedback for a LQG control system. In contrast to the independent code and carrier tracking loop of a conventional receiver algorithm, the code and carrier tracking variables are correlated in the LQG system. Not only are the multiple states correlated with each other, but also the control inputs are formulated from a combination of the states and the optimal LQG controller gain. In addition, this paper develops a moving set point to estimate the GNSS signal more accurately. To analyze the advantage of the proposed method, a signal tracking simulation using hardware GNSS simulator is performed and the simulation results show that the tracking performance of the moving set-point LQG system is better than that of a conventional loop filter, especially in terms of the code tracking performance.
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Recommended by Editorial Board member Duk-Sun Shim under the direction of Editor Myotaeg Lim.
This research was supported by a grant from “Development of Wide Area Differential GNSS,” which is funded by the Ministry of Oceans and Fisheries of the Korean government, contracted through SNU-IAMD at Seoul National University.
Sanghoon Jeon received his B.S. degree from the School of Mechanical and Aerospace Engineering at Seoul National University, Seoul, Korea, in 2004. Currently, He is in Ph.D. course at the School of Mechanical and Aerospace Engineering at Seoul National University. He is the leader of indoor navigation team of GNSS Lab. at Seoul National University. He is interested in GNSS signal processing, attitude determination receiver using GPS, software GNSS receiver.
Chongwon Kim is a Ph.D. student in the School of Mechanical and Aerospace Engineering at Seoul National University, Korea. He received his B.S. and M.S. degrees in Mechanical and Aerospace Engineering from the same university. His research interests include indoor navigations, pseudolites, and GNSS receivers.
Ghangho Kim is a Ph.D. candidate in the School of Mechanical and Aerospace Engineering at Seoul National University, Korea. He received his B.S. and M.S. degrees from Seoul National University. His research interests include astrodynamics and orbit determination using GNSS.
Ojong Kim is a Master student in the School of Mechanical and Aerospace Engineering at Seoul National University, Korea. He received his B.S. degree from Seoul National University. His research interests include APNT and GNSS receiver technology.
Changdon Kee is a Professor in School of Mechanical and Aerospace Engineering at Seoul National University, Korea. He received his B.S. and M.S. degrees from Seoul National University and his Ph.D. degree from Stanford University in 1994. He has been involved in GPS research for more than 20 years, during which time he has made numerous contributions, most notably to the development of the Wide Area Augmentation System (WAAS).
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Jeon, S., Kim, C., Kim, G. et al. Optimal signal tracking algorithm for GNSS signal using moving set-point LQG system. Int. J. Control Autom. Syst. 11, 1214–1222 (2013). https://doi.org/10.1007/s12555-012-0076-3
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DOI: https://doi.org/10.1007/s12555-012-0076-3