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)。
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.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第9期129-131,共3页
Electric Power Automation Equipment
