In order to evaluate the noise related to data issuing from a turbo-encoder,
estimates
of the noise related to its systematic output, to the data issuing from its first
elementary encoder, and to the data issuing from its second elementary encoder
are determined. At least two of the estimates of the noise related to the systematic
output, to the data issuing from the first encoder, and to the data issuing from
the second encoder, are added. The results of these additions are divided by the
number of augends added, and then inverted, so as to obtain a noise factor, and
the noise factor is multiplied with the data issuing from at least one of the first
encoder, second encoder, and systematic output.
