A method for processing an analog composite signal in a system has the steps of receiving a composite signal with at least one first signal component and at least one interfering signal component filtering the composite signal with a filter having a transfer function H(s) sampling the filtered composite signal in periodic intervals wherein each periodic interval has n samples forming a matrix equation representing the composite signal wherein the matrix equation has a signal vector with the at least first one signal component and the at least one interfering signal component and a matrix comprising weighted coefficients solving the matrix equation to determine the at least one signal component outputting the at least one signal component.
