TERMINAL POSITION TRACKING METHOD BY USING A BROADCASTING SATELLITE AND GAP FILLERS AND A DUMMY PILOT REPEATER FOR TRACKING TERMINAL POSITION ONLY, CONCERNED WITH MINIMIZING AN ERROR AND REDUCING A COST

摘要

PURPOSE: A terminal position tracking method by using a broadcasting satellite and gap fillers and a dummy pilot repeater for tracking terminal position only are provided to measure a distance with a PN code when measuring a position of a terminal, and to synchronize gap fillers by using a CDM signal. CONSTITUTION: A broadcasting satellite(200) supplies a signal and the first reference time to gap fillers(210,220) and a terminal(230), and provides previously set coordinates of the broadcasting satellite(200) to the terminal(230). The gap fillers(210,220) set the second reference time through the supplied signal. The gap fillers(210,220) provide self coordinates and the second reference time to the terminal(230) by using an idle channel. The terminal(230) compensates for signals transmitted from the gap fillers(210,220) by using the first and second reference times, and obtains a time offset between the received signals. The terminal(230) obtains a relative distance difference up to each gap filler(210,220) and the broadcasting satellite(200) from the terminal(230) by using the time offset. A position of the terminal(230) is obtained by using each coordinate and the relative distance difference.