Patent ID: 7663532

Claim:
A terminal positioning method using received timings of received signals as to particular incoming waves transmitted between a plurality of base stations and a terminal, the method comprising the steps of: a first step of calculating a correlation value between each of said received signals and a predetermined code to create a delay profile representing a correlation between each of said received signals and the predetermined code; a second step of determining said received timings of each of said incoming waves with reference to a rise timing when each of said delay profiles rises from a noise level; and a third step of calculating a position of said terminal by using said received timings relative to the plurality of the base stations, wherein a first threshold value for determining said rise timing is set and a second threshold value, which is larger than said first threshold value and used to determine each of incoming waves, is set on the basis of a maximum correlation value measured, and a received timing of said each incoming wave is determined at that point in time when a value of said delay profile becomes equal to said second threshold value, and said rise timing is set when the value of said delay profile is equal to said first threshold value before the received timing of said incoming wave.