WIRELESS DEVICE

摘要

A distortion compensation unit compensates distortion in the amplifier by using a distortion compensation coefficient that is in accordance with a power value of a signal before amplification in the amplifier. An updating unit updates, on the basis of the signal before amplification in the amplifier and a signal after amplification in the amplifier, the distortion compensation coefficient. An extracting unit extracts, at a predetermined number of measurement periods, when the power value of the signal before amplification in the amplifier is equal to or greater than a threshold, the distortion compensation coefficient that is in accordance with the power value. A first calculating unit calculates, by using an average value of the extracted distortion compensation coefficients, an amount of variation in the distortion compensation coefficient. A determination unit determines, on the basis of the calculated amount of variation in the distortion compensation coefficient, whether the amplifier is degraded.

主权项

1. A wireless device comprising:
an amplifier that amplifies a signal that is wirelessly transmitted; and a processor configured to:
compensate distortion in the amplifier by using a distortion compensation coefficient that is stored in a distortion compensation table and that is in accordance with a power value of the signal before amplification in the amplifier;update, on the basis of an error between the signal before the amplification in the amplifier and an amplified signal after the amplification in the amplifier, the distortion compensation coefficient stored in the distortion compensation table;extract, at a predetermined number of measurement periods, from the distortion compensation table when the power value of the signal before the amplification in the amplifier is equal to or greater than a threshold, the distortion compensation coefficient that is in accordance with the power value;calculate, by using an average value of distortion compensation coefficients extracted at the predetermined number of measurement periods, an amount of variation in the distortion compensation coefficient with respect to an initial value of the distortion compensation coefficient; anddetermine, on the basis of the calculated amount of variation in the distortion compensation coefficient, whether the amplifier is degraded.