At present, the Beidou-3 global satellite navigation system (BDS-3) has been fully completed, which can provide the broadcast of four-frequency signals (BIC, B1I, B3I and B2a). Compared with triple-frequency or dual-frequency signals, four-frequency signals can form more extra-wide-lane/wide-lane (EWL/WL) combinations, which helps to the rapid resolution of ambiguity and the improvement of positioning performance. However, most of the current research on four frequency signals focuses on baseline solutions, and research in dynamic environments is not yet available. Therefore, the single epoch positioning performance of the BDS-3 four-frequency EWL/WL observation in the dynamic environment is studied in this paper. First, the BDS-3 four-frequency linear combination observation equation is given, the optimal linear combination is selected through certain criteria, and four linear combination schemes are analyzed. Then, the stepwise ambiguity fixing method of EWL/WL is used to obtain stable WL observation for positioning. Finally, the influence of the four linear combination schemes on the single-epoch dynamic positioning performance of the BDS-3 four-frequency EWL/WL observation are analyzed through vehicular experiment. The experimental results show that the dynamic positioning accuracy of schemes 1 and 3 are basically the same in the horizontal and vertical directions, both reaching the decimeter level. Therefore, the EWL/WL combination of scheme 1 and scheme 3 is better for dynamic positioning.
Performance Analysis of BDS-3 Four-Frequency EWL/WL Single Epoch Dynamic Positioning
Lect. Notes Electrical Eng.
China Satellite Navigation Conference (CSNC 2022) Proceedings ; Kapitel : 25 ; 287-297
2022-05-05
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
SAE Technical Papers | 2020
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