Method and apparatus for location finding in a communication...

Details Method and apparatus for location finding in a communication... Method and apparatus for location finding in a communication...

H - Electricity

04

Q

H04Q 7/22 (2006.01) G01S 5/00 (2006.01) G01S 5/02 (2006.01) G01S 5/04 (2006.01) G01S 5/12 (2006.01) H04Q 7/36 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2264077

A method for determining a subscriber unit location in a communication system including the steps of receiving a signal from the subscriber unit (1390) at a first base station, determining a first receive time of the signal based on a sequence of spreading symbols at the first base station, determining a first angle of arrival of the signal at the first base station, and determining the location of the subscriber unit from the first received time, the first angle of arrival, and further predetermined information about the first base station. The signal is formed via modulation by the sequence of spreading symbols.

Cette invention se rapporte à un procédé conçu pour localiser une unité d'abonné dans un système de communication consistant à recevoir un signal émanant de l'unité d'abonné (1390) au niveau d'une première station de base, à déterminer un premier instant de réception du signal en fonction d'une séquence de symboles d'étalement au niveau de la première station de base, à déterminer un premier angle d'arrivée du signal au niveau de la première station de base, et à localiser l'unité de l'abonné à partir du premier instant de réception, du premier angle d'arrivée et d'autres informations préétablies relatives à la première station de base. Le signal est formé, au moyen d'une modulation, par la séquence des symboles d'étalement.

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