Power series type predistorter for multi-frequency bands operation

摘要

A power series type predistorter for multi-frequency bands includes a linear transmission path P_L provided with a delay element 5 and distortion generating paths P_D1 and P_D2 for a plurality of frequency bands in parallel; wherein each of the distortion generating paths P_D1 and P_D2 for a plurality of frequency bands includes variable band signal extractors 111 and 112 for extracting a signal in each frequency band from input signals and distortion generators 131 a and 132 a which is provided with the extracted signals and which generates at least one of the odd number distortion components of the signals and making it as an output from the distortion generating paths P_D1 and P_D2 for frequency bands; and wherein the frequency band controller 6 controls frequency bands of the variable band signal extractors 111 and 112.