浅析双线性变换法中的预畸变问题  

A Brief Analysis on the Predistortion Problem inthe Bilinear Transformation Method

作　　者：谢小娟[1] 张爱清[1] 刘小明 Xie Xiaojuan;Zhang Aiqing;Liu Xiaoming(AnHui Normal University,School of Physics and Electricity,Wuhu Anhui 241000)

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241000

出　　处：《山西电子技术》2020年第6期8-10,22,共4页Shanxi Electronic Technology

基　　金：安徽省高等学校省级质量工程教学研究重大项目(2018jyxm1193);安徽省高等学校省级质量工程教学研究重点项目(2019jyxm0084)。

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。本文通过两个滤波器设计实例,合理地引出了双线性变换法中预畸变的相关概念,并指出了预畸变概念存在的条件。教学实践证明,通过设计合理的实例来讲述预畸变的概念,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 the teaching experience,this paper derives the concept of frequency prewraping in bilinear transformation naturally through two filter design examples 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 narratingthe concept through design examples can deepen students to understand the concept effectively.

关 键 词：数字滤波器 双线性变换 频率预畸变 

分 类 号：TN713.7[电子电信—电路与系统]