Abstract
In this paper we introduce the quadratically constrained integer least-squares problem and show how the LAMBDA method can be used to solve it for the purpose of GNSS attitude determination. The integer least-squares principle with quadratic equality constraints (ILSQE) is used to formulate our cost function. The solution of the ILSQE problem is derived and it is shown how the solution can be computed efficiently and rigorously with a novel LAMBDA based method. Experimental results with various single frequency GPS receivers are given to show the effectiveness of the proposed method. The method is also compared with some current methods of GNSS attitude determination. Apart from its efficiency, the proposed method is shown to dramatically improve the success rates of integer ambiguity GNSS attitude resolution.
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Recommended by Editor Hyun Seok Yang. This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education, Science and Technology (No. R11-2008-014-02001-0). The research of the second author was done in the framework of his ARC International Linkage Professorial Fellowship, at Curtin University of Technology, Perth, Australia, with Professor Will Featherstone as his host. These supports are greatly acknowledged.
Chansik Park received the B.S., M.S., and Ph.D. degrees in Electrical Engineering from Seoul National University in 1984, 1986, and 1997 respectively. He is currently with the School of Electrical and Computer Engineering, Chungbuk National University, Cheongju, Korea. His research interests include GNSS, SDR, AJ, ITS and WSN.
Peter J. G. Teunissen has 20 years of research experience in GNSS Positioning and Navigation. He is the inventor of the LAMBDA method for GNSS carrier phase ambiguity resolution. He is the Head of the Department of Earth Observation and Space Systems of the Delft University of Technology and a member of the Royal Netherlands Academy of Sciences.
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Park, C., Teunissen, P.J.G. Integer least squares with quadratic equality constraints and its application to GNSS attitude determination systems. Int. J. Control Autom. Syst. 7, 566–576 (2009). https://doi.org/10.1007/s12555-009-0408-0
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DOI: https://doi.org/10.1007/s12555-009-0408-0