Patent ID: 6895094

Claim:
An adaptive identification method for estimating a response of a system to an input signal, comprising the steps of: receiving the input signal and an observation signal, whereby the observation signal has a component consisting of said response to the input signal; determining an error signal e t at an instant t according to: e t =y t −X t T H t− , where y t denotes a value of the observation signal at the instant t, H t−1 is a column vector made up of L coefficients of a identification filter having a finite impulse response representative of an impulse response of the system, and X t T =(x t , x t−1 , . . . , x t−L+1 ) is a row vector made up of values x t , x t−1 , . . . , x t−L+1 of the input signal at the instant t and at L−1 preceding instants; obtaining prediction parameters of the input signal, whereby an energy of a prediction residue on successive frames of the input signal is minimised; and adapting the L coefficients of the identification filter by adding to the column vector H t−1 a column vector proportional to e t X t T ⁢ U t + λ ⁢ U t , where U t is a column vector made up of L values of the prediction residue of the input signal at the instant t and at the L−1 preceding instants, and λ is a positive or zero coefficient.