| 摘要 |
PROBLEM TO BE SOLVED: To propose a power series type a predistorter for multiple frequency bands suitable for a power amplifier which amplifies two or more band signals whose center frequencies are separated enough of bandwidth of each band with less distortion. SOLUTION: Sending signals which include two or more band signals are distributed into communication channels of line signals which include delay channels, and distortion generation paths for two or more frequency pairs. In the distortion generation paths for each frequency pair, a band signal extractor extracts signals of the frequency pairs from distributed signals, an odd-degree distortion generator generates odd-degree distortion of the extracted signals, and a vector regulator regulates the phase and amplitude of the odd-degree distortion. Then the distortion generation paths are output. A synthesizer compounds two or more outputs of the distortion generation paths and output of communication channels of line signals. Therefore, the power series type predistorters for multiple frequency bands outputs a synthesized output. COPYRIGHT: (C)2005,JPO&NCIPI
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