| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce distortion generated in output signals by more finely adjusting the contents of a table for distortion compensation for adjusting the waveform of the input signals of an amplifying apparatus. <P>SOLUTION: When the distortion of the output signals of a power amplifying part 140 is larger than a first threshold used in the adaptive control processing of interpolation data I, Q by a perturbation method using power series, a table value calculation part 280 performs the adaptive control of the interpolation data I, Q by the perturbation method using the power series and updates a power series distortion compensation table 282. On the other hand, when the distortion of the output signals of the power amplifying part 140 is smaller than the first threshold used in the adaptive control processing of the interpolation data I, Q by the perturbation method using the power series, the table value calculation part 280 performs the adaptive control processing of the interpolation data I, Q by the perturbation method by representative point interpolation and updates a representative point interpolation distortion compensation table 284. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
