【摘要】 详细研究了数字滤波器的设计方法,根据数字滤波器的基本原理,提出了设计的新方法———累试法。即用软件直接在Z平面选择零点和极点,然后观察数字滤波器的幅频特性、相频特性,如果满足设计要求,则输出系统函数和数字滤波器的结构,否则继续在Z平面设置重复设置零极点。用Visual Basic 6.0设计出累试法软件,该方法直接、简单,可快速地设计出数字滤波器。更多还原

【Abstract】 A variety of digital filter design,and a new method called many times trials to construct digital filter according to the basic principles of digital filter are presented.Designing the digital filter on Z plane by choosing of zero and polar directly with software,and then observing the digital filter of the frequency,phase-frequency characteristics,if meeting design requirements,system functions and structure of the digital filter are output,otherwise continue to choose zero and polar in the Z plane.Finally the software of many times trials with Visual Basic 6.0 is designed.The method is direct,simple,able to quickly design a digital filter.更多还原