多级完全自适应陷波滤波器的设计

Multiple Fully Adaptive Notch Filter Design Based on All-pass Filters

设计了一种典型的自适应级联结构的IIR陷波滤波器，用来探测和跟踪频率随时间变化的信号。该信号含有加性高斯白噪声， 采用全通滤波器的频域转换和梯度截短算法。通过仿真模拟显示，该算法计算简单，收敛迅速，并且能产生较好的频率分辨率。

We develop a canonical, adaptive cascade-structure IIR notch filter to detect and track multiple time-varying frequencies in additive white Gaussian noise. The algorithm uses all-pass frequency transformation filters and a truncated gradient. Simulations indicate that our algorithm is computationally simple, converges rapidly, and has good frequency resolution.