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

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.