Survey of IIR adaptive filtering algorithms

摘要: Several adaptive algorithms for IIR filters have been presented in recent years. These can be categorized as gradient search or non-gradient search. We present here an example which a non-quadratic, multimodal error surface is possible. In particular, case models fourth-order FIR plant with two-pole filter. The resulting has three distinct minima. Using this example, we compare the NRLMS (gradient search) algorithm Genetic (non-gradient Algorithm. A combination of two then improved performance over individual algorithms.