Demand-based power and data rate adjustments to a...

Details Demand-based power and data rate adjustments to a... Demand-based power and data rate adjustments to a...

H - Electricity

04

L

H04L 1/20 (2006.01) H04B 7/005 (2006.01) H04L 1/00 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2217357

In a communication system in which a transmitter transmits data over a communication channel of a fixed bandwidth to a receiver, the method according to which the transmit data rate is continuously adjusted to a rate which is substantially equal to a short-term average input data rate. The channel capacity is, correspondingly to transmit data rate adjustments, continuously adjusted, through changes in transmit power, symbol rate and modulation format, to a level at which the ratio of received signal energy per bit to noise spectral density (Eb/No) at the receiver is close to but above its minimum acceptable level, thereby matching the channel capacity to the traffic.

Dans un système de communication où un émetteur transmet des données sur une voie de communication à largeur de bande fixe à un récepteur, la méthode, en accord avec de débit de transmission des données, est réglée sans interruption pour être égale approximativement au débit d'entrée moyen à court-terme. La capacité de la voie, nécessaire au réglage du débit de données à transmettre, est ajustée continûment par le biais du changement de la puissance transmise, du débit de symbole et du format de modulation, pour atteindre un niveau où le rapport de l'énergie du signal reçu par bit à la densité spectrale du bruit (Eb/No) au récepteur est près mais non supérieur à son niveau minimal acceptable, de façon à adapter la capacité de la voie au trafic.

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