浅谈线性卷积在调制光谱分析中的应用

Discussion on the Application of Linear Convolution in Modulation Spectrum Analysis

线性卷积是“数字信号处理”课程中十分重要的运算,但学生经常对这一运算的物理意义及作用机理理解不足。将线性卷积应用于调制光谱分析的案例中,展现线性卷积在调制光谱解析各次谐波信号的作用机理,与传统“调制-锁频-滤波”方法相比,能够让学生理解线性卷积的物理意义、机理及其在工程实践中的应用价值。

Linear convolution is an important calculation in the Digital Signal Processing course.However,some students always have insufficient understanding of its theory and mechanism.In the case of applying linear convolution to modulation spectrum analysis,it demonstrates the mechanism of linear convolution in the analysis of harmonic signals in modulation spectrum.Compared with the traditional "modulation-frequency-locking-filtering" method,students can understand the physical theory and mechanism of linear convolution and its application in engineering practice.