Pre-distortion for a non-linear transmission path in the high frequency range

摘要

A circuit for predistorting a signal to be transmitted via a non-linear channel comprises an envelope detector for detecting an envelope of the signal. A quantization for forming quantized envelope values on the basis of the detected envelope is connected to the envelope detector as well as to a table for supplying complex predistortion coefficients which depend on the quantized envelope values and on a previously detected transmission function of the non-linear channel. An evaluation circuit separated from the non-linear channel and used for the complex evaluation of the signal to be transmitted via the non-linear channel with the complex predistortion coefficients permits the distortion introduced by the non-linear channel to be substantially compensated according to amount and phase.