9.2 Principles of Adaptive Filter 9.2.1 Features of Adaptive Filters 9.2.2 Optimum versus Adaptive Filters 9.2.3 Stability and Steady-State Performance ofAF 9.2.4 Some Practical Considerations9.2 Principles of Adaptive Filter 9.2.1 Features of Adaptive Filters 9.2.2 Optimum versus Adaptive Filters 9.2.3 Stability and Steady-State Performance of AF 9.2.4 Some Practical Considerations