| 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 |
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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 |
