| 摘要 |
<p>This transmitter has: a plurality of transmission circuits for distortion compensation, amplification, and transmission of signals of mutually different frequency bands; and a common feedback circuit for feedback of signals transmitted from the plurality of transmission circuits. The common feedback circuit is provided with: a path switching part for switched input of signals transmitted from the plurality of transmission circuits; a frequency conversion part for multiplying each of the signals of mutually different frequency bands input by the path switching part, by a common local signal of the same frequency; and a distortion compensation coefficient calculation part for calculating, on the basis of each of the signals converted in frequency by the frequency conversion part, a distortion compensation coefficient to be used for distortion compensation in each of the plurality of transmission circuit.</p> |
