Precorrection of a nonlinear amplifier

H - Electricity – 03 – F

Patent

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Details

H03F 1/26 (2006.01) H03F 1/32 (2006.01)

Patent

CA 2512858

A method and apparatus are disclosed for predistorting an input signal to a non-linear amplifier. An appropriate precorrection is determined for the input signal over a series of iterative stages according to an amplifier model. The amplifier model includes a limiting function that clips the input signal to reduce error due to amplifier saturation. The determined precorrection is then applied to the input signal.

L'invention concerne un procédé et un appareil pour la distorsion préalable d'un signal entrant dans un amplificateur non linéaire. Une précorrection appropriée est déterminée pour ce signal d'entrée à travers une série d'étapes itératives, conformément à un modèle d'amplificateur. Le modèle d'amplificateur comprend une fonction de limitation qui écrête le signal d'entrée pour réduire l'erreur résultant de la saturation de l'amplificateur. La précorrection déterminée est ensuite appliquée au signal d'entrée.

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