根據(jù)IIR 濾波器存在突出的缺點，對自適應(yīng)IIR 濾波器設(shè)計進行策略性研究。分別討論輸出誤差法(OEM)和方程誤差法（EEM）在設(shè)計自適應(yīng)濾波器的應(yīng)用。通過對仿真結(jié)果
進行分析比較，修正的EEM 克服OEM 在設(shè)計結(jié)果中存在多個局部極小值的不足，優(yōu)于OEM。從而提出設(shè)計自適應(yīng)濾波器的策略和實現(xiàn)途徑。
關(guān)鍵詞：自適應(yīng)濾波器；IIR 濾波器；輸出誤差法(OEM)；方程誤差法（EEM）
Abstract: Aimed at disadvantage of IIR filer, design method for adaptive IIR filter was
researched in detail. Output error method(OEM) and equation error method(EEM) was desired for adaptive IIR filter design. Comparison with OEM, improved EEM overcome the shortcoming of infinitesimal avalue in convergence. The simulation show that EEM outgo OEM, which provide an approach for design of adaptive IIR filter.
Key words: adaptive filter, IIR filter, out error method(OEM), equation error method(EEM)