Patent ID: 7170344

Claim:
A multi-band predistorter using power series representation for compensating for distortions genreated by a power amplifier, said predistorter comprising: dividing means for dividing input signals of multiple frequency bands and providing the divided input signals to a linear signal transfer path and a plurality of distortion generation paths for a plurality of frequency bands; combining means for combining outputs from said linear signal transfer path and from said plurality of distortion generation paths; and a delay circuit provided in said linear signal transfer path; wherein each of said plurality of distortion generation paths includes: a band signal extractor for extracting a signal of corresponding one of said plurality of frequency bands from said divided input signals provided to said each distortion generation path; and a distortion generator supplied with said extracted signal, for generating at least one of odd-order distortion components of said extracted signal as an output from said each band-specific distortion generation path.