FIR 底通和带通滤波器和IIR 底通和带通滤波器，随机调制信号下的模拟ppm，重要参数的提取，有PMUSIC 校正前和校正后的比较，利用matlab GUI实现的串口编程例子。-Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Random ppm modulated analog signal under Extract important parameters, A relatively before correction and after correction PMUSIC, Use serial programming examples matlab GUI implementation.