A method 1, wherein {HEAD ~ the coefficients} of said adaptive filter V are adjusted by gradient methods or equivalent methods, based on the minimization of a cost function that measures a statistic dispersion of {TAIL ~ said output signal} 
A method 1 , wherein { HEAD ~ the coefficients } of said adaptive filter V are adjusted by gradient methods or equivalent methods , based on the minimization of a cost function that measures a statistic dispersion of { TAIL ~ said output signal }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL