Tdoa based positioning with calculation of correction factors for compensating the clock offsets of unsynchronized network stations

Positionnement base sur la tdoa (difference entre les temps d'arrivee) avec calcul de facteurs de correction pour compenser les decalages d'horloge de stations de reseau non synchronisees

Abstract

The present invention presents a method, arrangement and computer program product for clocking exploiting the relative behavior of clocks of individual receiving stations as well as a corresponding modeling to derive a time difference of arrival of a signal from a user device which can be used to correct the time difference of arrival based on the modeled clock behavior and leads to a correct clocking of received user signals without the need of synchronization of the clocks in the various receiving stations. This principle is applicable to a plurality of pairs of receiving stations and beacon signals transmitted amongst them and allows for a correct location estimation of a user device.

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