Research on bi-satellite positioning system positioning method based on distributed pseudolite

Based on the deficiency of research on the Bi-satellites Positioning System (BPS) using pseudolite technology, an improved positioning strategy on BPS which is based on distributed pseudolite technology is pat forward. By taking full advantage of actual equipment of BPS and restructuring terrestrial calibration station to distributed pseudolite station, the strategy can carry out single positioning with data fusion method which do not change the actual mechanism of BPS. The improved strategy can ameliorate the GDOP of the system and heighten the location precision from the results of simulation experiment, especially in low latitude area, the location precision which is 20∼60m can enhance more than three times of actual location precision, and the none-resource positioning mode can solve the limitation of user capability, coverability and anti-vulnerability.