A Cascade Approach to the Design of IIR Bandpass Filter  

作　　者：Wan Wanggen Yu Xiaoqing Yuan Jingxian Li Yonghua (School of Communication and Information Engineering) 

出　　处：《Advances in Manufacturing》1998年第3期38-42,共5页先进制造进展（英文版）

摘　　要：A prototype IIR bandpass filter is derived from an analog bandpass filter using bilinear transformation. The formulas relating the IIR bandpass filter's coefficients with its centre frequency and bandwidth are obtained. Using N sections of such filters, a cascade IIR bandpass filter is constructed. Based on given specifications and the formulas, the parameter N and the bandwidth of prototype filter can be obtained, and the required cascade IIR bandpass filter is obtained. The filter has a small set of coefficients with a simple structure, therefore is easy to design. The described approach is especially suitable for hardware implementation.A prototype IIR bandpass filter is derived from an analog bandpass filter using bilinear transformation. The formulas relating the IIR bandpass filter's coefficients with its centre frequency and bandwidth are obtained. Using N sections of such filters, a cascade IIR bandpass filter is constructed. Based on given specifications and the formulas, the parameter N and the bandwidth of prototype filter can be obtained, and the required cascade IIR bandpass filter is obtained. The filter has a small set of coefficients with a simple structure, therefore is easy to design. The described approach is especially suitable for hardware implementation.

关 键 词：IIR bandpass filter bilinear transformation CASCADE 

分 类 号：TN713[电子电信—电路与系统]