Patent ID: 7973708
Filing Date: 2011-07-05
Classification: G01S

Abstract:
1. A global navigation satellite system (GNSS) based positioning system, comprising: a location tracking server; and a GNSS positioning device connected to the location tracking server through an access point and data communication network, wherein the GNSS positioning device comprises: a signal amplifier for amplifying a satellite signal after receiving the same from a GNSS satellite; a signal converter for converting the amplified satellite signal to GNSS digital data (intermediate frequency or baseband digital data); a supplementary information processor to extract supplementary information used for positioning, and integrate the supplementary information with the GNSS digital data to generate augmented GNSS digital data; and a network adaptor for transferring the augmented GNSS digital data to the location tracking server through the data communication network; wherein the network adaptor transfers the augmented GNSS digital data to the location tracking server through the data communication network in real time when a data transmission rate of the data communication network is equal or greater than a predetermined data transmission rate, and transfers the augmented GNSS digital data to the location tracking server through the data communication network after storing the augmented GNSS digital data when the data transmission rate of the data communication network is lower than the predetermined data transmission rate.