“信号与系统”课程教学实例

信号频谱分析是“信号与系统”课程中的重点内容，但学生在理解相关概念和理论时常存在较大的困难。针对这种现象，本文介绍了一种信号频谱分析的教学实例。该实例利用傅里叶变换的数值计算方法，对太阳黑子数进行频谱分析，并确定太阳活动的周期。本教学实例注重引导学生理论联系实际，既深化学生对频谱分析的基本概念与基本理论的理解，又有利于培养学生分析解决实际问题的能力。

Teaching Case of Signal And System Course

The spectrum analysis of signals is an important part in the signal and system course. It is found that the students often have great difficulties in understanding the abstract concepts and theories of spectrum analysis. On the basis of the numerical calculation of the Fourier transformation and the sunspot number, the spectrum of the sunspot number variation and the solar cycle can be determined. This teaching case focuses on guiding students to solve the practical problem by using the theoretical knowledge. It is helpful for the students to better understand the concepts and theories of spectrum analysis and to improve the ability in analyzing and solving the practical problems.