Digital linearizing system

Details Digital linearizing system Digital linearizing system

H - Electricity

03

M

H03M 1/10 (2006.01) H03M 1/06 (2006.01)

Patent

CA 2560568

A method of compensating for nonlinear distortions in a digital signal comprises receiving the digital signal, generating a nominal phase shifted signal based on the digital signal, generating a modeled distortion signal based on the digital signal and the nominal phase shifted signal, subtracting the modeled distortion signal from the digital signal, and generating a compensated signal. A compensating system comprises an input interface configured to receive a digital signal having nonlinear distortion, and a distortion model coupled to the interface, configured to generate a nominal phase shifted signal based on the digital signal, generate a modeled distortion signal based on the digital signal and the nominal phase shifted signal, subtract the modeled distortion signal from the digital signal, and generate a compensated signal.

L'invention concerne un procédé de compensation de distorsions non linéaires dans un signal numérique, qui consiste à recevoir le signal numérique, à générer un signal à décalage de phase nominale, à générer un signal à distorsion modelée basé sur le signal numérique et le signal à décalage de phase nominale, à soustraire le signal à distorsion modelée du signal numérique et à générer un signal compensé. Un système de compensation comprend une interface d'entrée configurée pour recevoir un signal numérique présentant une distorsion non linéaire, et un modèle de distorsion couplé à l'interface, configuré pour générer un signal à décalage de phase nominale basé sur le signal numérique, à générer un signal à distorsion modelée basé sur le signal numérique et le signal à décalage de phase nominale, à soustraire le signal à distorsion modelée du signal numérique et à générer un signal compensé.

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