The design scheme of FIR digital filter and the filter implementation based on Matlab are introduced. By using a variety of functions provided by Matlab signal processing toolbox to select the appropriate Window Function, and according to the actual signal processing requirement of the Window Function to select the parameter. The ideal filter with different functions can be obtained by modifying the filter parameters as required and changing the procedures. A method of using FDATool to design filters is introduced, which only needs to modify the parameters simply.%提出FIR数字滤波器的设计方案,并基于Matlab实现滤波仿真.通过使用Matlab信号处理工具箱提供的函数,选择适当的窗函数编写程序,其中窗函数按照实际信号的处理需求,参数折中选择.实验获得了比较理想的滤波器特性,可以实现较好的滤波作用.而且在实际应用中只需按需求修改滤波器参数,并结合程序的相应改动,即可实现不同功能的滤波器.另外,介绍了利用FDATool设计滤波器的方法,简单修改参数即可实现多种滤波器.
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