数字滤波器冲击响应函数c++源代码，包含低通、高通、带通、带阻滤波器，与待滤波信号进行卷积运算，完成滤波处理。-FIR Filter Based

针对信号 进行各种铝箔然后处理信号 包络解调得到频谱(A variety of aluminum foil for the signal and then deal with the signal envelope demodulation to the spectrum)

将采集到的数据信号导入MATLAB软件进行处理，查看其信号频谱图，采用频域窗函数法编程设计数字滤波器，实现低通、带通和高通滤波效果。(The collected data is imported into the MATLAB software to process, check the signal frequency spectrum, and design the digital filter with frequency window function method to achieve