Patent ID: 7013147
Filing Date: 2006-03-14
Classification: H04W

Abstract:
1. A wireless positioning method for estimating a position of a terminal by using reception timings of signals transmitted from at least first and second base stations in a cellular communication system, comprising: a first step of storing received signals from a plurality of base stations in a storing circuit; a second step of reading out received signals stored in the storing circuit and measuring a reception timing of a received signal from the first base station having a power higher than that of a received signal from a second base station; a third step of canceling the received signal from the first base station from stored received signals; a fourth step of reading out received signals stored in the storing circuit and measuring a reception timing of the received signal from the second base station after the second step, wherein the third step comprises: a fifth step of forming a replica of the received signal of the first base station from the stored signals; a sixth step of subtracting the replica from the stored signals and overwriting the signals stored in the storing circuit with a result of the subtraction step; and a seventh step of forming the replica by processing a component of the received signal from the first base station in a procedure of despreading, demodulation and respreading by using the code division multiple access (CDMA) system.