Device and method for locating a mobile station in a mobile...

Details Device and method for locating a mobile station in a mobile... Device and method for locating a mobile station in a mobile...

G - Physics

01

S

G01S 5/10 (2006.01) G01S 5/12 (2006.01) H04Q 7/20 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2318038

A device and method for locating a mobile station (MS) in a mobile communication system. In the MS locating device for an MS which receives signals synchronized to a predetermined time from at least three adjacent base stations (BSs) and is located within a serving BS of the at least three BSs, an analog to digital converter (ADC) converts the received BS signals to digital chip sample data, a memory stores the chip sample data, a dedicated searcher detects at least two signals by correlating the chip sample data received from the memory by off-line processing and calculates the signal-to-interference ratios (SIRs) and time difference of arrival (TDOA) of the two signals, and a controller estimates the MS location based on the SIRs and TDOA received from the dedicated searcher.

L'invention porte sur un dispositif et un procédé permettant de localiser une station mobile (MS) dans un système de communication mobile. Dans un dispositif de localisation de MS destiné à une MS qui reçoit des signaux synchronisés sur un temps prédéterminé entre au moins trois stations de base adjacentes (BS) et qui est située dans une station de base desservant les trois BS, un convertisseur analogique-numérique (CAN) convertit les signaux BS reçus en données numériques d'échantillons prélevés, une mémoire stocke les données d'échantillons prélevés, un dispositif de recherche spécialisé détecte au moins deux signaux en corrélant les données d'échantillons prélevés reçues en provenance de la mémoire au moyen du traitement hors ligne et calcule les rapports signal-interférence (SIR) et la différence de temps d'arrivée (TDOA) des deux signaux, et un dispositif de commande estime la position de MS sur la base des SIR et des TDOA reçus en provenance du dispositif de recherche spécialisé.

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