The disclosed invention provides a wireless communications terminal apparatus
that calculates its accurate position, eliminating the influence of a repeater
on the calculation without using complicated processing. The terminal apparatus
receives signals transmitted from a plurality of radio stations and calculates
its position, using the received signals. The terminal apparatus comprises 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 that radio station from
among the received signals and position calculation means for calculating its position.
When the repeater detection means has detected a signal from a repeater, the position
calculation means ignores the detected signal from the repeater and calculates
the terminal position, using the received signals from other radio stations.