中文说明：随机调制信号下的模拟ppm，独立成分分析算法降低原始数据噪声，插值与拟合，解方程，数据分析，一种噪声辅助数据分析方法,IMC-PID是利用内模控制原理来对PID参数进行计算，对信号进行频谱分析及滤波。
English Description：
Simulation of random modulation signal ppm, independent component analysis algorithm to reduce the noise in the raw data, interpolation and fitting, solving equations, data analysis, a method of secondary data analysis of noise, IMC-PID is the PID parameters by using internal model control theory to calculate the signal spectrum analysis and filtering.