Patent ID: 6959174
Filing Date: 2005-10-25
Classification: H03F,H04B

Abstract:
1. An amplifying device comprising: orthogonal modulating sections each for applying digital orthogonal modulation to an input signal per carrier and performing offset rotation processing of the signal per carrier subjected to the digital orthogonal modulation; a coupling section for combining the signals of the respective carriers subjected to the digital orthogonal modulation and the offset rotation processing, thereby to output a multi-carrier signal; a digital delay section for digital-delaying the output from said coupling section for a constant time; a digital/analog converting section for converting the digital-delayed signal to an analog signal; an up-convert section for converting the analog signal to a radio frequency; a power detecting section for detecting a power value based on the output from said coupling section; an amplifying section for amplifying the multi-carrier signal; a distributing section for distributing an output from said amplifying section; and a distortion compensating section for giving distortion compensation to the multi-carrier signal from said up-convert section for canceling a nonlinear characteristic generated in said amplifying section, based on the power value detected in said power detecting section and an output from said distributing section.