Automatic gain control system for a multi-user digital ofdm...

H - Electricity – 04 – B

Patent

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Details

H04B 3/54 (2006.01) H03G 3/20 (2006.01) H04B 7/005 (2006.01) H04J 11/00 (2006.01) H04L 5/02 (2006.01) H04L 5/14 (2006.01) H04L 25/03 (2006.01) H04L 27/26 (2006.01) H04L 27/38 (2006.01)

Patent

CA 2447256

The invention relates to a system comprising numerous pieces of user equipment and a piece of headend equipment which are in bi-directional communication by means of the electric grid. The inventive system is essentially characterised in that it comprises: carrier-to-carrier processing on the transmitter signals and the receiver signals and control over the transmitting power of the different pieces of equipment. Said system can be used to: reach a maximum number of users, achieve a maximum transmitting power, admit signals coming from very close and very distant users, prevent the occurrence of overflows, introduce the maximum average power over the available communication range and minimise the number of bits necessary for the analogue/digital conversion upon reception.

L'invention concerne un système comprenant plusieurs équipements d'utilisateur et un équipement de tête en communication bidirectionnelle par l'intermédiaire du réseau électrique. Ses caractéristiques essentielles sont le traitement de porteuse à porteuse sur les signaux d'émission et sur les signaux de réception, et la commande de la puissance de transmission des différents équipements. Ce système permet d'atteindre un nombre maximal d'utilisateurs, d'atteindre une capacité maximale de transmission, d'admettre des signaux provenant d'utilisateurs très proches et très lointains, d'éviter que se produisent des débordements, d'introduire le maximum de puissance moyenne sur la gamme disponible pour la communication et de minimiser le nombre de bits nécessaire pour la conversion analogique/numérique à la réception.

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