Method and device for generating a carrier frequency

H - Electricity – 04 – B

Patent

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H04B 7/26 (2006.01) H04B 1/713 (2006.01)

Patent

CA 2300068

The invention concerns a method and a device for producing a carrier frequency sequence (Fx) for mobile radiotelephone transmission. A first computing device (25) predetermines, by means of a first algorithm, the value of carrier frequencies (fx) for the time interval numbers (n-1) m+1 to (nm)-1). n represents a run parameter not less than 1, and m represents a predetermined whole number greater than 1. Thus the value m indicates after how many time intervals a mobile part in idle locked mode, on stand-by, is synchronised on the base station (1). Moreover, a second computing device (26) is provided for a second algorithm depending on the first algorithm. Said second algorithm predetermines the value of carrier frequencies for the time interval bearing number (nm).

L'invention concerne un procédé et un dispositif permettant de produire une séquence de fréquences porteuses (Fx) pour la transmission en radiotéléphonie mobile. Un premier dispositif de calcul (25) prédétermine, à l'aide d'un premier algorithme, la valeur des fréquences porteuses (fx) pour les numéros d'invervalles de temps (n-1) ? m+1 à (n?m)-1). n représente un paramètre d'exécution qui est supérieur ou égal à 1, et m représente un nombre entier prédéterminé qui est supérieur à 1. La valeur m indique ainsi après combien d'intervalles de temps une partie mobile qui se trouve en mode verrouillé au repos, du type en attente, se synchronise sur la station de base (1). En outre, un second dispositif de calcul (26) est prévu pour un second algorithme dépendant du premier algorithme. Ce second algorithme prédetermine la valeur des fréquences porteuses pour l'intervalle de temps portant le numéro n?m.

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