零极点特性在数字滤波器基础实验教学中的应用  

Application of Zero-Pole Characteristic in the Basic Experiment Teaching of Digital Filter

作　　者：肖涵 李苑青 XIAO Han;LI Yuan-qing(Education Center of Experiments and Innovation,Harbin Institute of Technology,Shenzhen,Shenzhen,Guangdong 518055,China)

机构地区：[1]哈尔滨工业大学〔深圳〕实验与创新实践教育中心,广东深圳518055

出　　处：《教育教学论坛》2022年第32期53-56,共4页Education And Teaching Forum

基　　金：2019年度哈尔滨工业大学(深圳)教学改革项目“电类专业实践类系列课程建设的研究”(HITSZRP19003)。

摘　　要：零极点特性是“数字信号处理”课程中的一个基本概念,分析零极点分布对于研究数字系统特性而言必不可少。在教学实践中,零极点分布主要用于分析系统的因果性和稳定性,而对于系统的其他性质的研究较少。基于仿真软件及虚拟仪器平台,在数字滤波器基础实验中分析零极点分布对数字滤波器特性(类型判断、通频带特性等)的影响,模拟信号离散化过程中采样频率对滤波器特性的影响,便于学生理解和掌握零极点在滤波器设计中的作用。Zero-pole characteristic is a basic concept in the Digital Signal Processing course,and the analysis of zero-pole distribution is essential to analyze the properties of digital systems.In teaching practice,zero-pole distribution is mainly used to study the causality and stability of the systems,while the other properties of systems are less studied.Based on the simulation software and virtual instrument platform,this paper analyzes the influence of zero-pole distribution on the characteristics of digital filter(e.g.,type judgment,pass band characteristics).This paper also discusses the effect of sampling frequency on filter properties in the discretization process for analog signals.The basic experiment of digital filter enables students to understand and master the roles of zero-pole in the filter design.

关 键 词：零极点 数字信号处理 数字滤波器 虚拟仪器平台 

分 类 号：G642.0[文化科学—高等教育学]