9.2.1 Features of Adaptive Filters Supervised adaptation Desired Performance response evaluation y(n) x(n) Filtering (n) Input structure Output e(n) signal signal Filter coefficients Error Adaptation algorithm FIGURE 9.8 Basic elements of a supervised adaptive filter FIGURE 9.8 Basic elements of a supervised adaptive filter y ˆ(n) Supervised adaptation. 9.2.1 Features of Adaptive Filters