h（n）的长度N没有给定，仅给定通带边缘截止频率wc和阻带临界频率ws，以及相应的衰减，用窗函数法设计线性相位FIR低通滤波器-h (n) of length N is not given, only given pass band edge cutoff frequency wc and stop band the critical frequency ws, and the corresponding attenuation window function design linear pha

采用多级级联方法降低了对硬件运算速度的要求，有利于实时处理；采用余弦滤波器改善了阻带衰减不足；内插二阶多项式滤波器补偿了 CIC 滤波器通带内的衰减；抗混叠低通滤波器减小了混叠影响-Using multi-stage cascade approach reduces hardware requirements for computing speed, real-time processing in favor cosine filter improves the stop-band atten

高通，带 阻滤波在ARDUINOIDE环境下的运行及串口绘图器输出波形-High-pass Band-pass and Band-stop Filtering