摘要
频谱是"信号与系统"教学中的一个重点和难点。其中,"负频率"的概念非常抽象和难以理解。本文借助Matlab工具对正、负频率分量的物理意义在三维空间进行揭示,并讨论频率响应函数的物理内涵,以此加深学生对频谱概念和频域分析的理解,以期取得更好的教学效果。
Frequency spectrum is one of the emphasis and difficulty in the course of Signals and Systems. Moreo- ver, the concept of negative frequency is abstract and hard for understanding. This paper employs Matlab software to demonstrate the physics meaning of positive/negative frequency in 3D space and discusses the deeper physical intension of the frequency response function, which can effectively improve the understanding of the concepts of fre- quency spectrum and frequency analysis , expecting to get better teaching ＆ learning effect.
出处
《电气电子教学学报》
2017年第3期52-53,69,共3页
Journal of Electrical and Electronic Education
基金
西安电子科技大学新实验开发项目(项目编号:SY1581)
西安电子科技大学研究生教育综合改革试点项目(项目编号:15Y2)
关键词
信号与系统
正/负频率
频率响应
MATLAB
signals and systems
positive/negative frequency
frequency response
Matlab
