Dc removal techniques for wireless networking

H - Electricity – 03 – D

Patent

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Details

H03D 3/00 (2006.01) H04L 12/28 (2006.01)

Patent

CA 2483511

A wireless communication device (WCD) (10) performs DC removal on a received signal using a coarse DC removal unit (36) that removes relatively large DC components and a fine DC removal loop (42) that removes residual DC components. The coarse DC removal unit (36) can be implemented in a receiver (22), and the fine DC removal loop (42) can be implemented in a modem (26). In addition, a coarse DC estimation loop (44) implemented on the modem (26) may be coupled to the coarse DC removal unit (36) to update DC offset values stored in the DC removal unit (36). By storing coarse DC offset values locally on the receiver, DC removal can be achieved very quickly.

L'invention concerne un dispositif de communication sans fil (10) permettant de réaliser la suppression c.c. au niveau d'un signal reçu, au moyen d'une unité de suppression c.c. grossière (36) qui permet d'éliminer des composantes c.c relativement importantes et d'une boucle de suppression c.c. fine (42) qui permet d'éliminer des composantes c.c. résiduelles. Cette unité c.c. grossière (36) peut être implémentée dans un récepteur (22), et la boucle de suppression c.c. fine (42) peut être implémentée dans un modem (26). En outre, une boucle d'estimation c.c. grossière (44) implémentée sur le modem (26) peut être couplée à l'unité de suppression c.c. grossière (36) pour mettre à jour des valeurs de correction c.c. stockées dans l'unité de suppression c.c. (36). Le stockage local des valeurs de correction c.c. grossières sur le récepteur permet la réalisation très rapide de la suppression c.c.

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