Amplifier apparatus, radio transmitting apparatus including same, and method of adjusting gain of amplifier apparatus

摘要

An object of the present invention is to provide an amplifier apparatus 1 in which even if a gain of a returning analog circuit 4 fluctuates, the fluctuation in the gain can be corrected, making it possible to accurately perform a distortion compensation process by a DPD 20. The present invention relates to an amplifier apparatus 1 including an amplifier 11 and a digital pre-distorter (DPD) 20 that performs a distortion compensation process of the amplifier 11. The amplifier apparatus 1 includes a transmitting analog circuit 3 including the amplifier 11; a returning analog circuit 4 including an attenuator 15; a power measurement circuit 16 that measures output power of the amplifier 11; and an amount-of-change calculating unit 27 that calculates an amount of change ΔGrx in a gain Grx of the returning analog circuit 4, based on a measured value of the power measurement circuit 16.

主权项

1. An amplifier apparatus including an amplifier and a digital pre-distorter (hereinafter, referred to as “DPD” in the claims) that performs a distortion compensation process of the amplifier, the amplifier apparatus comprising:
a transmitting analog circuit that converts a digital output signal from the DPD to an analog signal, up-converts the analog signal, and inputs the analog signal to the amplifier, the transmitting analog circuit including the amplifier; a returning analog circuit that adjusts an analog output signal from the amplifier to a predetermined amplitude, down-converts the analog output signal to a digital signal, and inputs the digital signal to the DPD; and a power measurement circuit that measures output power of the analog output signal from the amplifier, wherein a measured value of the power measurement circuit is inputted to the DPD.