Research on BDS/GPS dual-mode single point positioning

In order to promote the popularization of BDS, the BDS / GPS dual-mode positioning is studied, and the pseudorange single point positioning algorithm of the dual-mode system is analyzed. On the basis of the least squares method, the weighted method is used to improve the accuracy of the positioning solution, and a fixed weight method combining the elevation angle model and posterior variance estimation is proposed. Finally, carry out experimental tests, the results show that compared with the least squares method, the weighted least squares method has good anti-noise performance, so that the dual-mode single point positioning is more accurate and stable. At the same time, weighted dual-mode single point positioning performance is better than GPS single system.