Method and apparatus for rotating a phase of a modulated signal

H - Electricity – 04 – L

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H04L 27/36 (2006.01) H03F 1/32 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2386647

Techniques to adjust the phase rotation of a modulated signal to compensate for the phase rotation introduced by circuit elements associated with the transmit signal path. The circuit elements can be located directly in, or operatively coupled to, the transmit signal path. A phase rotation corresponding to an operating state defined by the received control signal(s) is then determined, and the phase of the modulated signal is rotated by an amount related to the determined phase rotation. The phase rotation compensation can be performed at various locations along the transmit signal path by rotating either the data, the PN sequences used to spectrally spread the data, or the carrier signals used to modulate the data.

L'invention concerne des techniques permettant de régler la rotation de phase d'un signal modulé de manière à compenser la rotation de phase introduite par des éléments de circuit associés à un parcours de signal de transmission. Ces éléments de circuit peuvent être localisés directement dans le parcours de signal de transmission, ou couplés fonctionnels à ce parcours. Une rotation de phase correspondant à un état de fonctionnement défini par un ou plusieurs signaux de commande reçus est alors déterminée, la phase du signal modulé étant soumise à une rotation dans une mesure proportionnelle à la rotation de phase déterminée. La compensation de rotation de phase peut s'effectuer à divers emplacements le long du parcours du signal de transmission par rotation des données, des séquences BPA utilisées pour l'étalement spectral des données, ou des signaux porteurs utilisés pour moduler ces données.

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