Method and apparatus for precise open loop tuning of...

H - Electricity – 03 – L

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H03L 7/07 (2006.01) H03L 1/02 (2006.01) H03L 7/091 (2006.01) H04B 1/00 (2006.01)

Patent

CA 2554123

A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when the communications subsystem operates in closed loop mode. The subsystem further includes an open loop frequency correction means that that samples values of the reference frequency adjustment signal during the closed loop mode and generates a frequency correction signal for correcting the reference frequency signal when the communications subsystem operates in a mode other than closed loop mode.

L'invention concerne un sous-système de communication pour un dispositif sans fil, permettant de corriger des erreurs dans un signal de fréquence de référence. Le sous-système de communication comprend un générateur de fréquence destiné à générer le signal de fréquence de référence et un module de correction de fréquence de référence en boucle fermée qui génère un signal de réglage de fréquence de référence afin de corriger le signal de fréquence de référence lorsque le sous-système de communication fonctionne en mode boucle fermée. Le sous-système comprend également un moyen de correction de fréquence en boucle ouverte qui échantillonne des valeurs du signal de réglage de fréquence de référence au cours du mode boucle fermée et génère un signal de correction de fréquence afin de corriger le signal de fréquence de référence lorsque le sous-système de communication fonctionne dans un mode autre que le mode boucle fermée.

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