滤波器能够设计阶数，巴特沃兹，车比雪夫1,2型，椭圆，还有众多窗函数的FIR滤波器-Filter can order Butterworth car than Chebyshev type 1 and 2, oval, there are a number of window functions FIR filter

信号的读入，并根据所设计的低通滤波器加噪，并设计低通滤波器去噪-Signal input, noise, and design of low pass filter to noise

通过实验巩固FIR滤波器的认识和理解,熟练掌握FIR低通滤波器的窗函数设计方法。 -Through the experiment to consolidate the understanding and understanding of FIR filter, master the FIR low-pass filter window function design method.