Repeatedly: pre-processing a received signal using feedback to obtain a pre-processed signal, the feedback being based on a previous signal, the previous signal being received prior to the received signal; evaluating at least one of a quality of a demodulated signal and a quality of a decoded signal, the demodulated signal being obtained from the pre-processed signal by demodulating, the decoded signal being obtained by decoding the demodulated signal; deciding if the respective at least one of the quality of the demodulated signal and the quality of the decoded signal is sufficient; selecting neither or one of the demodulated signal and the decoded signal as a selected signal based on the at least one of the quality of the demodulated signal and the quality of the decoded signal for which it is decided whether or not the quality is sufficient; and updating the feedback based on the selected signal.