| 摘要 |
PROBLEM TO BE SOLVED: To provide a power series type predistorter for multiple frequency bands capable of suitably selecting a frequency band to be used in an environment where a plurality of radio systems are intermingled. SOLUTION: The power series type predistorter for multiple frequency bands is provided with a linear transmission path P<SB>L</SB>comprising a delay unit 5. Distortion generation paths P<SB>D1</SB>, P<SB>D2</SB>for a plurality of frequency bands are arranged in parallel with each other. The distortion generation paths P<SB>D1</SB>, P<SB>D2</SB>for frequency bands includes variable band signal extractors 111, 112 for extracting signals of each frequency band from input signals, and distortion generators 131a, 132a for receiving the extracted signal and generating at least one odd order distortion component of the signal to make the generated results into outputs of a distortion generator path P<SB>L</SB>for frequency band. A frequency band controller 6 controls frequency bands of the variable band signal extractors 111, 112. COPYRIGHT: (C)2007,JPO&INPIT
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