Wireless device and wireless access system

摘要

A wireless device includes a digital-to-analog converter that converts a digital transmission signal within a digital signal processing band to an analog transmission signal, a modulator that performs quadrature modulation of an analog transmission signal obtained by the digital-to-analog converter using a first local signal having a first frequency outside a frequency range, the frequency range centered around a center frequency of a transmission signal and having a bandwidth of the digital signal processing band, and outputs a modulated signal, a frequency converter that performs a frequency shift of a modulated signal output from the modulator using a second local signal having a second frequency within the frequency range, and an inhibitor that performs carrier leakage inhibition processing on the digital transmission signal, based on a signal obtained by the frequency converter.

主权项

1. A wireless device comprising:
a digital-to-analog converter that converts a digital transmission signal within a digital signal processing band to an analog transmission signal; a modulator that performs quadrature modulation of an analog transmission signal obtained by the digital-to-analog converter using a first local signal having a first frequency outside a frequency range, the frequency range centered around a center frequency of a transmission radio-frequency signal to be transmitted from the wireless device and having a bandwidth of the digital signal processing band, and outputs a modulated signal; a frequency converter that performs a frequency shift of a modulated signal output from the modulator using a second local signal having a second frequency within the frequency range; and an inhibitor that performs carrier leakage inhibition processing on the digital transmission signal, based on a signal obtained by the frequency converter; an amplifier that amplifies the modulated signal output from the modulator, and outputs an amplified signal; and a distortion compensator that performs, on the digital transmission signal, distortion compensation processing for compensating for a distortion included in the amplified signal, wherein the frequency converter performs a frequency shift using the second local signal on a modulated signal output from the modulator in a carrier leakage inhibition processing period, and performs a frequency shift using the first local signal on an amplified signal output from the amplifier in a distortion compensation processing period, and wherein the distortion compensator performs the distortion compensation processing based on a signal obtained by the frequency converter in the distortion compensation processing period.