一种变步长自适应格型IIR陷波器及其在混响抵消中的应用研究  

A Variable Step-Size Adaptive IIR Notch Filter and Its Application in Reverberation Canceling

作　　者：梁红[1] 李志舜[1] 王惠刚[1] 

机构地区：[1]西北工业大学航海工程学院,陕西西安710072

出　　处：《电声技术》2004年第2期4-8,41,共6页Audio Engineering

基　　金："十五"国防重点预研项目

摘　　要：提出了一种改进的变步长自适应格型IIR陷波器算法,仿真表明,提出的算法在收敛速度、时变系统跟踪速度与收敛精度方面比固定步长算法好。将该算法运用到混响抵消和混响中心频率估计中,效果良好。The best adaptive algorithm requires for fast convergence speed, low variance and low steady-state mean square error, a variable step-size algorithm for a second order adaptive IIR notch filter is proposed. This algorithm is compared with fixed step-size algorithm,and the proved properties are given. Simulation results confirm that the performance of the proposed algorithm is better than other algorithms. By using time varying step-size μ(n) algorithm to reverberation canceling and center frequency estimation, the proposed algorithm is proved to be good.

关 键 词：变步长算法 自适应格型 IIR陷波器 频率估计 混响抵消 

分 类 号：TN713[电子电信—电路与系统] O427.2[理学—声学]