数字系统的系统函数—频率响应教学方法

Teaching Method of System Functions and Frequency Responsesof Digital Systems

本文针对“数字信号处理”课程的核心内容:系统函数—频率响应关系,提出了结合系统函数的三维幅度图与二维等高线图的教学方法,并通过具体实例论述了该教学方法的实施过程,它为理解系统函数—频率响应关系提供了高效、直观的教学策略。教学实践表明,本文提出的教学方法对掌握零点—极点、系统函数、频率响应等知识点有很好的促进作用。

The relationships between system functions and frequency responses are the one of most important parts of the Digital Signal Processing course.The novel teaching method based on the combination of 3-D magnitude figure and corresponding 2-D contour map of a system functions is proposed in this paper.Some specific examples are applied to discuss its implementation in classroom teaching.The presented method provides an efficient and intuitive teaching strategies tounderstandthe relationships between system functions and frequency responses.The teaching practice shows that the method providesa good promotion to mastersome key knowledge,including zero and pole,system function and frequency response,etc.