Apparatus and method for determining position information of a mobile station

Abstract

An apparatus and method for determining position information of a mobile station (MS). The apparatus directly estimates a propagation delay error by measuring a signal strength of a propagation signal for use in a mobile communication system, and reduces a MS position error. The apparatus reduces the MS position error by either combining the propagation signal for the mobile communication system with a GPS signal or using only the propagation signal. The apparatus receives Mobile Station (MS) position acquisition signals from the mobile communication system in order to estimate position information of the MS. The position signal acquisition unit receives the MS position acquisition signals, acquires a position signal from the received MS position acquisition signal, and outputs an acquired position signal. The primary position calculator calculates a primary position using the acquired position signal received from the position signal acquisition unit. The propagation delay error range setup unit determines a propagation delay error range using the acquired position signal. The propagation delay error estimator estimates a propagation delay error using the determined propagation delay error range and the primary position. The position calculator calculates a secondary position using the propagation delay error estimation value received and the calculated primary position.