Correction method and correction loop for a complex digital...

H - Electricity – 03 – C

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H03C 5/00 (2006.01)

Patent

CA 2510692

The invention concerns correction of delay between the phase and the envelope of a digital signal. In particular, the invention concerns the application of said correction in digital broadcast transmitters. The invention provides an alternative solution wherein the use of the initial signal is not necessary. There is no need for temporal comparison with the initial signal. The invention aims at providing a method for correcting at least one parameter to be corrected pc of the digital signal envelope comprising the following steps: breaking down the digital signal into an envelope signal and a phase signal; determining the equalizer to be applied to the envelope parameter by finding the minimum intensity levels of signal out-of-band noise.

L'invention concerne la correction du retard entre la phase et l'enveloppe d'un signal numérique. En particulier, elle concerne l'application de cette correction dans des émetteurs de diffusion numérique. La présente invention permet d'offrir une solution alternative dans laquelle l'utilisation du signal initial n'est pas nécessaire. Aucune comparaison temporelle avec le signal initiale n'est nécessaire. Un objet de l'invention est un procédé de correction d'au moins un paramètre à corriger pc de l'enveloppe d'un signal numérique comportant les étapes suivantes: - la décomposition du signal numérique en un signal d'enveloppe et un signal de phase, - la détermination du correcteur à appliquer au paramètre de l'enveloppe par recherche du minimum de puissances de bruit hors bande du signal.

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