G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 19/25 (2010.01) G01S 19/46 (2010.01) G01S 5/10 (2006.01) G04G 7/02 (2006.01) H04W 64/00 (2009.01)
Patent
CA 2388743
A method and apparatus for determining the position of a wireless communication device using global positioning system (GPS) satellites, base stations synchronized to GPS time and base stations that are unsynchronized with GPS time. The unsynchronized base stations are synchronized with one another. Time of arrival information is adjusted to take into account the fact that wireless communication devices that received GPS time information from a base station receive that information biased by the one-way delay that is encountered by the signal that communicates that information to the wireless communication device. In addition, time difference of arrival information for base stations that are not synchronized to GPS time allows the bias between these base stations GPS time to be eliminated.
L'invention concerne un procédé et un dispositif permettant de déterminer la position d'un dispositif de communication sans fil utilisant des satellites du Système de positionnement global (GPS), des stations de base synchronisées au temps GPS et des station de base non synchronisées au temps GPS. Les stations de base non synchronisées sont synchronisées entre elles. On ajuste les informations concernant le temps d'arrivée afin qu'elles prennent en compte que les dispositifs de communication sans fil recevant des informations de temps GPS depuis une station de base reçoivent lesdites informations faussées par le délai unidirectionnel subit par le signal communiquant ces informations au dispositif sans fil. En outre, une différence de temps des informations d'arrivée pour les stations de base non synchronisées au temps GPS permet d'éliminer le décalage du temps GPS entre ces stations de base.
Qualcomm Incorporated
Smart & Biggar
LandOfFree
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