基于LabVIEW的数字滤波器设计与实现

Design and Implementation of Digital Filter Based on LabVIEW

数字滤波器是数字信号处理必不可少的器件之一。传统数字滤波器利用大规模集成硬件实现,虽然处理速度快,但功能不易改变。本文设计了一种基于LabVIEW的虚拟数字滤波器,利用虚拟仪器生成仿真信号,而后设置滤波器的参数,通过频谱测量模块对原始信号和滤波后的信号进行比较,将比较结果在上位机显示出来。通过测试可知,基于LabVIEW的虚拟滤波器不仅可以实现传统滤波器的功能,而且具有操作方便、结果直观、运行可靠、响应速度快、开发周期短等优点。

Digital filter is one of the essential components of digital signal processing.Traditional digital filter is im?plemented of large scale integrated hardware,which processing speed is fast,but the function is hard to change.This paper designed a kind of virtual digital filter based on LabVIEW.The virtual filter used virtual instrument to generate simulation signal,then setted the parameters of the filter and compared the original signal with the filtered signal by using the spectrum measurement module,and finally displayed the result in the host computer.The test shows that the virtual filter based on LabVIEW can not only realize the function of the traditional filter,but also has the advan?tages of convenient operation,direct result,reliable operation,fast response and short development cycle.