PREDISTORTION FOR A NON-LINEAR CHANNEL IN THE HIGH-FREQUENCY REGION

摘要

A circuit (10) for predistorting a signal to be transmitted via a non-linear channel (18) comprises an envelope detector (24) for detecting an envelope of the signal (v). A quantization means (22) for forming quantized envelope values on the basis of the detected envelope is connected to the envelope detector (24) as well as to a table (16) for supplying complex predistortion coefficients which depend on said quantized envelope values and on a previously detected transmission function of the non-linear channel. An evaluation circuit (14) separated from said non-linear channel (18) and used for the complex evaluation of the signal (v) to be transmitted via the non-linear channel (18) with the complex predistortion coefficients permits the distortion introduced by the non-linear channel (18) to be substantially compensated according to amount and phase.