Wireless communication apparatus, Doherty amplifier, and method for controlling wireless communication

摘要

A wireless communication apparatus includes: a first amplifier configured to amplify an input signal; a second amplifier configured to amplify the input signal when an input level of the input signal is equal to or larger than a given level; an impedance converter configure to switch an load impedance of the first amplifier and output a composite output of an output from the first amplifier and an output from the second amplifier; an impedance controller section configured to control a switching of the load impedance of the first amplifier based on a bandwidth of the input signal; a distortion compensation section configured to perform distortion compensation of the input signal and supply a compensated input signal to the first amplifier and the second amplifier; and a filter section configured to limit a band of a signal output from the impedance converter.

主权项

1. A wireless communication apparatus comprising:
a first amplifier configured to amplify an input signal; a second amplifier configured to amplify the input signal when an input level of the input signal is equal to or larger than a given level; an impedance converter configured to switch a load impedance of the first amplifier and output a composite output comprising an output from the first amplifier and an output from the second amplifier, the impedance converter comprising a first capacitor coupled to a transmission channel via a first switch; an impedance controller section configured to control a switching of the load impedance of the first amplifier such that a first switching is performed as the switching when a bandwidth of the input signal is equal to or less than a given value and a second switching is performed as the switching when the bandwidth of the input signal is greater than the given value; a distortion compensation section configured to perform distortion compensation of the input signal and output a compensated input signal to the first amplifier and the second amplifier; and a filter section configured to limit a band of a signal output from the impedance converter.