WIRELESS COMMUNICATION DEVICE

摘要

A wireless communication device includes a table, a correction unit, a digital-to-analog converter (DAC), a power amplifier, an analog-to-digital converter (ADC), a calculation unit, and an update unit. The table stores distortion correction coefficients, each corresponding to a different amplitude level of a transmission signal. The correction unit corrects the transmission signal based on the distortion correction coefficient. The DAC converts the corrected transmission signal into an analog signal. The power amplifier amplifies the analog signal. The ADC converts the amplified signal into a digital signal. The calculation unit calculates a distortion correction coefficient candidate based on the transmission signal and the digital signal. The update unit updates the distortion correction coefficient stored in the table based on the distortion correction coefficient candidate, so long as the number of times the transmission signal is input to the correction unit is not greater than a threshold.

主权项

1. A wireless communication device comprising:
a memory that contains a table that stores a plurality of distortion correction coefficients which are respectively set for different amplitude levels of an input transmission signal; a correction unit to which the input transmission signal and one of the distortion correction coefficients are input, the correction unit configured to generate a corrected transmission signal based on the input transmission signal and one of the distortion correction coefficients that are input thereto; a digital-to-analog converter connected to the correction unit to generate an analog signal from the corrected transmission signal; a power amplifier configured to amplify the analog signal; an analog-to-digital converter connected to the power amplifier to convert the amplified signal into a digital signal; a calculation unit configured to calculate a distortion correction coefficient candidate based on the input transmission signal and the digital signal; and an update unit configured to update the distortion correction coefficient stored in the table based on the distortion correction coefficient candidate, wherein the update unit updates the distortion correction coefficient stored in the table when the number of times the transmission signal is input to the correction unit is equal to or less than a predetermined threshold, and does not update the distortion correction coefficient when the number of times the transmission signal is input to the correction unit is greater than the threshold.