| 摘要 |
PROBLEM TO BE SOLVED: To prevent any discontinuity from occurring in the distortion compensation characteristic. SOLUTION: In a distortion generation path of a power series predistorter, a frequency characteristic compensator that adjusts the frequency characteristic of a distortion component is provided in series with an odd-order distortion generator. A distortion detector detects a distortion component from a transmission signal resulting from demodulating the output of a power amplifier, the distortion component is split into windows each having a band width ofΔf by a distortion component frequency characteristic splitter, and the power of the distortion component in each window is detected. Based on the detected power, the frequency characteristic compensator adjusts a part of the frequency characteristic of the distortion component associated with each window. COPYRIGHT: (C)2007,JPO&INPIT
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