Distortion compensation apparatus and method
AssigneeFujitsu Limited
InventorAlexander Nikolaevich LOZHKIN
Life of this patent
Estimating the term…
Abstract
A distortion compensation apparatus compensates for non-linear distortion of a power amplifier. The distortion compensation apparatus includes a pre-distorter, a learning unit, and a gain control unit. During training of the pre-distorter, the learning unit repeatedly updates a compensation coefficient on the basis of signals output from the power amplifier. While the training continues after update of the compensation coefficient, the gain control unit performs gain control on a signal before input to the power amplifier.
Claims7
A distortion compensation apparatus that compensates for non-linear distortion of a power amplifier, the distortion compensation apparatus comprising:
- a pre-distorter configured to apply distortion to a signal before input to the power amplifier, in accordance with a compensation coefficient;
- a learning unit configured to repeatedly update the compensation coefficient on the basis of signals output from the power amplifier, during training of the pre-distorter;
- and
- a gain control unit configured to perform gain control on a signal before input to the power amplifier, while the training continues after update of the compensation coefficient.
A distortion compensation method that compensates for non-linear distortion of a power amplifier by using a pre-distorter, the method comprising:
- updating a compensation coefficient used by the pre-distorter on the basis of a signal output from the power amplifier, during training of the pre-distorter;
- and
- performing gain control on a signal before input to the power amplifier, while the training continues after update of the compensation coefficient.
Dependencies are inferred from the claim text.