二维递归数字滤波器新的时域设计方法

 本之将二维递归数字滤波器的时域设计转化为二维线性移不变差分模型的辨识问题。文中采用一种新的辨识方法,能确定滤波器的阶次和参数矩阵。该方法中运用了实时递推算法,使得初始信息矩阵较小,占用较少的内存空间,故比较实用。文中给出了设计实例。

A NEW DESIGN METHOD IN TIME DOMAIN FOR TWO-DIMENSIONAL RECURSIVE DIGITAL FILTERS

A new design method in time domain for two-dimensional recursive digital filters is established in this paper. The design problem of two-dimensional recusive digital filter is transfered into the identification problem of two-dimensional LSI difference equation model, and the design problem of two-dimensional recursive digital filter in time domain is solved by using a new identification method which can estimate both the order and the parameter matrices of digital filter. The initial information matrix is small by using the real-time recursive algorithm, hence required internal menmory space is also small and it is practically useful. One design example is given in this paper.