B1/L1 carrier phase frequency mixing difference method for Beidou system and GPS (Global Positioning System)

The invention discloses a B1/L1 carrier phase frequency mixing difference method for a Beidou system and a GPS (Global Positioning System), relating to the technical field of satellite positioning systems and positioning measurement. The method comprises the following steps: receiving observation data broadcast by respective satellite of a Beidou system and a GPS to a user receiver by using the user receiver, and determining the B1 frequency carrier phase integer ambiguity of the Beidou system and the L1 frequency carrier phase integer ambiguity of the GPS respectively through a carrier phase observation equation; recovering the integer characteristics of the B1/L1 frequency carrier phase inter-satellite difference ambiguity parameters of the Beidou system and the GPS; determining the distance between a user Beidou/GPS receiver and a satellite. By adopting the B1/L1 carrier phase frequency mixing difference method, the influence of the frequency difference between the B1 carrier phase of the Beidou system and the L1 carrier phase of the GPS can be avoided, and the integer characteristics of the ambiguity parameters of B1/L1 frequency carrier phase frequency mixing inter-satellite difference are recovered.