Improved packet efficiency for block transmission signals...

H - Electricity – 04 – L

Patent

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H04L 27/26 (2006.01) H04L 25/02 (2006.01)

Patent

CA 2656184

A communication signal having a specialized preamble (410) allowing for increased bandwidth efficiency is disclosed. The specialized preamble consist of a serie of repeated blocks (412), wherein each block consist of a serie of symbols a0,...,aN with each symbol an defined as Formula (I),n=0,...,N. Said serie of symbols is also referred to as the "complex quadric" (CQ) sequence. The application further discloses a communication device adapted for using the specialized preamble for performing frequency offset estimation, clock synchronization and channel estimation.

Cette invention a pour objet un dispositif de communication configuré pour l'utilisation du transport d'un signal de communication ayant un préambule spécialisé permettant un rendement de bande passante amélioré. Le dispositif de communication comprend un premier dispositif configuré pour manipuler un schéma de transmission en bloc, tel qu'un signal OFDM ou SCBT, ayant une taille de bloc égale à N, où N est un entier supérieur à 1, le signal de transmission en bloc ayant un préambule avec une configuration de symbole tel qu'un pourcentage de tous les symboles du préambule peut être utilisé pour toute l'estimation de décalage en fréquence, une synchronisation d'horloge et une estimation de canal.

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