POSITIONING DEVICE, METHOD AND SYSTEM FOR BEIDOU NAVIGATION SATELLITE SYSTEM

摘要

A positioning device, method and system for the BeiDou navigation satellite system. The device comprises: a satellite capturing/tracking module (100) for obtaining a modulated signal which can be emitted using the satellite; a measured code pseudorange module (200) for obtaining a ranging code and a locally generated duplicate code, obtaining a measured code pseudorange according to the ranging code and the duplicate code and obtaining a first coordinate location according to the measured code pseudorange; a carrier signal obtaining module (300) for obtaining a first carrier signal according to the modulated signal and the duplicate code; and a measured phase pseudorange module (400) for obtaining a measured phase pseudorange according to the first carrier signal and a locally generated second carrier signal, obtaining a second coordinate location according to the measured phase pseudorange, generating an interrupt signal according to the second coordinate location and sending the interrupt signal to the measured code pseudorange module to enable the measured code pseudorange module to shut down the functions of obtaining the measured code pseudorange and the first coordinate location. The device immensely improves the speed and accuracy of positioning.