摘要
现有数字信号处理教材在讲述双线性变换法中预畸变概念时略有不足,在一定程度上影响了读者对“畸变”、“预畸变”以及“为什么叫预畸变”等概念的理解和掌握。通过一个滤波器设计实例,较自然地引出了双线性变换法预畸变的概念,并指出了预畸变概念适用的前提,即不能脱离相比较的模拟环境。教学实践证明,通过该实例讲述预畸变的概念,能有效加深学生对预畸变概念的认识和理解。
In existed textbooks of digital signal processing, the concept of frequency prewarping transformation in bilinear transformation is not narrated clearly. This affects the readers on mastering the correlation concept of ＂warping＂, ＂prewarping＂ and ＂why named prewarping＂ in a certain degree. According to author＇s teaching experience, this paper derives the concept of frequency prewraping in bilinear transformation naturally through a filter design example and points out the premise which the concept suits. It cannot be separated from the analogue environment which compares. It has been proved in practice that narrating the concept through this example can deepen students to understand the concept effectively.
出处
《电气电子教学学报》
2006年第2期35-37,共3页
Journal of Electrical and Electronic Education
关键词
数字信号处理
数字滤波器
双线性变换
预畸变
digital filter
bilinear transformation
digital signal processing
frequency prewarping transformation
