A Location Tracking method and apparatus of User Euipment Filter using GPS and TDOA

摘要

The present invention is a mobile communication network, a time difference of arrival (TDOA) method and the global positioning system (GPS) relates to the location tracking system incorporating the method and apparatus, the method comprising: using a GPS the code information acquiring a GPS located on the terminal using a frequency that is determined by frequency division rate of the mobile communication network, the chip clock cycle and, with the transmission time of the pilot signals transmitted from a plurality of base stations, the reception time of the terminal by using the pilot signals and for calculating a mean value of the TDOA is located obtain the TDOA of the terminal is located, is situated the TDOA of obtaining a position error value by subtracting the average value is located in the GPS, the method comprising the steps of performing a correction by performing the iteration method using the least square method with respect to the position error value, summing the mean value of the corrected position is located the TDOA error value is characterized in that comprises a process of obtaining a more precise located.