Taking MATLAB R2014a as the platform,this paper introduces the method of designing FIR digital filter with given specifications using graphical signal processing design tools--sptool,and applies sptool's intuitive and convenient signal processing function to import the relevant test signal to verify the designed filter.And verification results confirm that the design meets the requirements.%以 MATLAB R2014a 为平台,介绍了运用 MATLAB 中的图形化信号处理设计工具———sptool 来设计给定指标的 FIR 数字滤波器的方法,并应用 sptool 直观便捷的信号处理功能,导入相关的测试信号对设计的数字滤波器进行测试验证,验证结果符合要求。
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