用CVI开发的滤波程序，通过设置滤波器类型，采样频率，截止频率，衰减系数，滤波器的阶次，纹波系数来设计滤波器。-CVI development of the filtering process, through the establishment of filter types, sampling frequency, cutoff frequency, attenuation coefficient, Filter Order, Ripple to design the filter coef

用窗函数法设计线性相位FIR低通滤波器。要求通带截止频率ωc=π/4，单位脉冲响应h(n)的长度N=23。绘出h(n)及其幅频响应特性曲线-Window function with linear phase FIR design a low pass filter. Required pass-band cutoff frequency ωc = π/4, unit impulse response h (n) of length N = 23. Plot h (n) and frequency

基于fpga的fir滤波器，截止频率50k，阶数为32，用FDatool实现-Fpga based fir filter cutoff frequency 50k, order of 32, with FDatool achieve