摘要
利用级联型模拟椭圆滤波器设计方法、双线性模拟—数字滤波器变换方法和数字滤波器频带变换方法,设计了一种简便、稳健的级联型数字IIR滤波器。通过设定合理的频带变换参数,保证了该滤波器的稳定性;通过采用经验最优零、极点组织零、极点配对方法,可使该滤波器内部幅度限最小。最后给出了一个级联型数字椭圆带阻滤波器的设计实例。
By using the analog cascade elliptic filters desi gn method, and the bilinear method of transforming analog filters to digital filte rs, and the frequency transformation method of digital filters, a simple robust cascading digital IIR filter is designed. The stability of this filter can be as sured by setting rational frequency transformation parameters. The internal magn itude bound of this filter can be minimized by using an empirical optimal method of poles and zeros organization. At the end of this paper, an example of design ing a cascading digital elliptic band stop filter is provided.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2003年第4期31-37,共7页
Journal of National University of Defense Technology
基金
国家部委项目资助(D99-21)
关键词
稳健的
数字IIR滤波器
稳定性
经验最优零、极点组织方法
robust
digital IIR filters
stability
an empirical optimal method of poles and zeros organization
