摘要
本文对"数字信号处理"课程中的双线性变换法进行了深入的研究和分析,首先解释了双线性变换法中频率畸变产生的原因,其次利用Matlab软件仿真了频率预畸与频率不预畸在双线性变换法中对IIR数字滤波器性能的影响,通过这种比较,使学生能更直观地掌握频率畸变和频率预畸在双线性变换法中的作用,为实际的滤波器设计打下良好的基础。本文最后讨论了双线性变换法和脉冲响应不变法的一个不同。
In this paper, the concept of bilinear transformation in Digital Signal Process course is analyzed and re- searched deeply. Firstly, we explain the effect of frequency warping in the bilinear transformation solution. Then we compare the different effect of the performance of IIR digital filter between frequency pre-warping and frequency un-warping using Matlab software, which are helpful for those students who are learning the question of bilinear transformation solution and make a better basement for their future work. Finally, we discuss a different question between bilinear transformation method and impulse invariance method.
出处
《电气电子教学学报》
2014年第2期68-70,共3页
Journal of Electrical and Electronic Education
基金
解放军理工大学通信工程学院重点教改科研项目(20110206)
关键词
双线性变换法
频率畸变
频率预畸
bilinear transformation
frequency warping
frequency pre-warping
