The invention relates to a method of receiving digital data transmitted on a coded serial digital transmission modulated on a noisy channel with non-stationary equalization attenuation. Digital data are stored associating a value of quality of transmission with the information elements received, and a mutual information value Ik is computed for each value of the quality of transmission. The value of quality of transmission consists of an equivalent signal/noise plus interference ratio calculated as a function of the method of equalization on the basis of various signal/channel noise ratio values measured for the various temporal symbols of information elements received of the signal received corresponding to one and the same information element and according to interference due to the waveform.