Patent ID: 7013111

Claim:
A wireless communications terminal apparatus which receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals, comprising: repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and position calculation means for calculating the position of the terminal apparatus, wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means ignores the detected signal from the repeater and calculates the position of the terminal apparatus, using the received signals from other radio stations, and wherein said repeater detection means compares a distance corresponding to signal reception delay timing of receiving a signal from one of said radio stations and timing of receiving a signal from another one of said radio stations and a distance of said one of said radio stations and said another one of said radio stations, and determines whether said one of said radio stations is said repeater, based on the result of the comparison.