Hybrid analog/digital method and apparatus for controlling...

H - Electricity – 04 – B

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Details

H04B 7/005 (2006.01) H03G 3/00 (2006.01) H03G 3/30 (2006.01) H04B 1/04 (2006.01) H04L 1/00 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2247890

A technique for controlling the transmission power level of a transmitter, particularly in a wireless personal communication system, is disclosed. This technique assists in the prevention of interference between transceivers from degrading the quality of transmissions. Transmission power level is controlled through a hybrid circuit containing both digital and analog electronics. The transmission power level is set by controlling both the amount by which a data stream is compressed and the gain of an analog transmit power amplifier. This approach allows adequate control over the transmission power level; it avoids the need for utilizing excessively wide data paths for the digital transmit signals (which may compromise portable terminal battery consumption), or utilizing expensive, hard-to-calibrate analog electronics.

La présente invention se rapporte à une technique permettant de régler le niveau de la puissance de transmission, d'un système de communication radio personnel en particulier. Cette technique contribue à empêcher que les interférences entre émetteurs-récepteurs n'altèrent la qualité de la transmission. Le niveau de la puissance de transmission (170-172) est réglé au moyen d'un circuit hybride contenant des éléments électroniques numériques et analogiques. Le niveau de la puissance de transmission est déterminé par une régulation portant non seulement sur le coefficient de compression d'un flux de données mais aussi sur le gain d'un amplificateur de puissance de transmission analogique (160). Cette technique permet de régler efficacement le niveau de la puissance de transmission et supprime la nécessité d'utiliser des chemins de données d'une largeur excessive pour le signal de transmission numérique (qui peuvent augmenter la consommation en courant fourni par la batterie du terminal portable) ou une électronique analogique coûteuse et difficile à étalonner.

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