数字滤波器教学软件设计实践及在教学中的应用

Practice of Software Design of Digital Filter and its Application in Teaching

为了满足《数字信号处理》课程教学中辅助教学的强烈需求,基于LabVIEW 2012平台开发了虚拟数字滤波器教学软件并给出了其设计方案。仿真结果表明,所设计的虚拟数字滤波器的滤波效果良好,滤波输出信号与理论上的期望结果一致,证明软件的设计方案是正确的。最后,给出了在滤波器教学中的更多演示案例设计以及信号处理的效果。教学软件的功能设计较为完整,亦给出了较丰富的教学实验案例,从而有助于学生体验滤波的效果,强化对于滤波器功能的印象。因此,该教学软件具有较显著的教学价值以及很好的应用前景。

To satisfy the strong demand in the assisted teaching in the course of "Digital Signal Processing", the soft-ware of digital filter based on LabVIEW 2012 developing platform has been developed and the design of the software has been given in this research. The simulation result proves the good filtering effects of the Digital Filter and the output signals are proved to be the same as what are expected in theory,thus proving correct design of the software. Then, some more teaching cases of signal processing based on the designed filter have been given, showing that the design of the software functions is rather desirable. The provided cases in teaching and experiments will be very instructive for students to learn the filtering effects and to have a strong impression of the filter's function. This software displays significant value for teaching and therefore, a good application prospect may be expected as well.