引用本文: | 周耀辉,王芸波,朱维新,张玉仲,武焕舟.IIR数字滤波器设计[J].电力自动化设备,2010,(9): |
| ZHOU Yaohui,WANG Yunbo,ZHU Weixin,ZHANG Yuzhong,WU Huanzhou.Design of IIR digital filter[J].Electric Power Automation Equipment,2010,(9): |
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摘要: |
介绍了利用双线性变换法设计巴特沃斯无限长单位冲激响应(IIR)数字滤波器。具体设计步骤如下:按一定的技术指标将给出的数字滤波器转换为模拟低通滤波器;根据转换后的技术指标设计模拟低通滤波器 H(s);再将 H(s) 转换成 H(z)。对于高通、带通或带阻数字滤波器的设计,先将其技术指标转化为与之相应的作为“样本”的低通模拟滤波器的技术指标,再进行频率变换,然后按上述步骤设计出低通 H(s),再将H(s)转换为所需的 H(z)。 |
关键词: 巴特沃斯滤波器 双线性法 数字滤波器 IIR |
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Design of IIR digital filter |
ZHOU Yaohui1, WANG Yunbo2, ZHU Weixin1, ZHANG Yuzhong1, WU Huanzhou1
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1.China Petroleum Pipeline Transportation Company for Long Distance Oil Department,Wuhan 430077,China;2.Shenzhen Shandong Nuclear Power Construction Co.,Ltd.,Ji’nan 250100,China
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Abstract: |
The design of Butterworth IIR(Infinite Impulse Response) digital filter is introduced,which applies the bilinear transformation method. The design steps are:convert the given digital filter into analog low-pass filter according to the technique specifications;design the analog low-pass filter H(s) according to the converted technique specifica-tions;transform H(s) into H(z). For the design of high-pass,band-pass or band-stop digital filter,its technique specifications are converted into the technique specifications of corresponding analog low-pass filter and the frequency transform is then carried out. By following the design steps mentioned above, the low-pass filter H(s) is designed and its H(z) is obtained. |
Key words: Butterworth filter bilinear digital filter IIR |