Method and apparatus for estimating a signal fading...

H - Electricity – 04 – B

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H04B 7/08 (2006.01) H04B 17/00 (2006.01)

Patent

CA 2194786

A method and apparatus for measuring a characteristic of a fading signal received using two or more branch diversity receivers (100) is presented. This fading characteristic is proportional to the speed of the user. In a first embodiment the number of times the antenna branches change in a selection diversity process is counted (160), and the result is scaled (170) for imbalance between the branches. The output of a fading quality estimator (180), indicative of the fading and generally proportional to the speed, is thereby obtained.

L'invention se rapporte à un procédé et à un appareil permettant d'évaluer une caractéristique d'évanouissement de signal reçu utilisant deux ou plus de deux récepteurs en diversité sur branche d'antenne (100). Cette caractéristique d'évanouissement est proportionnelle à la vitesse de l'utilisateur. Dans un premier mode de réalisation, on compte (160) le nombre des changements de branche d'antenne dans le cadre d'un processus de diversité par sélection, le résultat étant étalonné (170) pour déterminer le déséquilibre entre les branches. Ainsi, on obtient la sortie d'un estimateur (180) de qualité d'évanouissement, laquelle donne une indication sur la qualité des évanouissements et qui est généralement proportionnelle à la vitesse d'utilisation.

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