Pseudolite-based precise positioning system with synchronised pseudolites

摘要

Pseudolite-based precise positioning system with synchronised pseudolites that can compute the position of a mobile station with slave pseudolites synchronised to master pseudolite is provided. Therefore pseudolite-based precise positioning system according to present invention does not need correction information of a reference station. A pseudolite-based precise positioning system for computing the position of a mobile station without correction information of a reference station, the pseudolite-based precise positioning system includes: master pseudolite with reference clock of the positioning system; at least one slave pseudolite having digitally controlled numerical controlled oscillator means; mobile station computing the position of itself based on the clock-synchronised signal from the master pseudolite and the slave pseudolite without correction information of a reference station; and clock synchronisation loop filter means having the digitally controlled numerical controlled oscillator means synchronise the clock of the slave pseudolite to the clock of the master pseudolite by transmitting synchronisation information U <custom-character file="US20050015198A1-20050120-P00900.TIF" wi="20" he="20" id="custom-character-00001"/>k? of the slave pseudolite to the digitally controlled numerical controlled oscillator means, clock synchronisation loop filter means generating the synchronisation information U <custom-character file="US20050015198A1-20050120-P00900.TIF" wi="20" he="20" id="custom-character-00002"/>k? based on the pseudorange information and carrier phase information received from the master pseudolite and the slave pseudolite.