数字信号处理课程中滤波器线性相位特性教学实验研究OA

The linear phase characteristics of digital filters have important applications in electronic information systems,and are also an important knowledge point in the undergraduate course of"Digital Signal Processing".However,in teaching practice,teachers often explain it only through theoretical analysis and drawing phase-frequency characteristic functions,which leads to students'lack of intuitive knowledge and understanding of linear phase characteristics and their engineering application background.In this paper,a teaching experiment that flexibly adjusts the phase characteristics of the filter is designed by using the circular conjugate symmetry characteristic of the Discrete Fourier Transform.By intuitively feeling the effect of audio signal before and after filtering,students can deepen their understanding of relevant knowledge points such as filter design in theoretical courses,and improve their understanding of the importance of linear phase characteristics in engineering applications.