? Method to compensate for the nonlinearities of a communication channel, transmitter, transmitter, communication port, system, computer program, and storage medium.

摘要

A method, performed by a transmitter of a communication port (400) is designed to compensate for the nonlinearities of a communication channel (500) comprising a transponder (510).A plurality of digital signals is modulated (S10) on a plurality of carriers.In which the symbols of the constellation diagram used for modulation of each carrier is distorted in accordance with a function of pre distortion.The modulated signals are then multiplexed by frequency division (S20) and transmitted (S30) for transmission through a communication channel (500) for at least one receiver (600).The function of pre distortion involves a plurality of polynomial functions, each of which having as input the symbols of all carriers.The coefficients of the polynomial functions, referred to as "pre distortion coefficients, are calculated in accordance with a direct approach to learning.Carried out jointly for the plurality of carriers.The pre distortion coefficients are updated iteratively based on the received signals being realimentados from a receiver (600).The invention also relates to transmitters and computer programs.