1. A filter adaptation unit suitable for producing a set of filter coefficients, said filter adaptation unit comprising: a) a first input for receiving a sequence of samples of a first signal; b) a second input for receiving a sequence of samples of a second signal, the second signal including a certain component which is correlated to the first signal; c) a third input for receiving a first set of error characterization data elements associated to a first set of filter coefficients, the first set of filter coefficients being such that when the first set of filter coefficients is applied by an adaptive filter on the first signal, a first estimate of the certain component in the second signal is generated, the certain component being correlated to the first signal; d) a coefficient generation unit operatively coupled to said first input and said second input, said coefficient generation unit being operative to generate a second set of filter coefficients at least in part on the basis of said first and second signals; e) an error characterization unit operative for processing the first signal and the second signal on the basis of the second set of filter coefficients to generate a second set of error characterization data elements associated to the second set of filter coefficients; f) a selection unit for selecting one of said first set of filter coefficients and said second set of filter coefficients at least in part on the basis of the first set of error characterization data elements and the second set of error characterization data elements; g) an output for releasing a signal indicative of the set of filter coefficients selected by the selection unit.