自己编的5种调制信号，现代信号处理中谱估计在matlab中的使用，计算多重分形非趋势波动分析，采用偏最小二乘法，用于信号特征提取、信号消噪。- Own five modulation signal, Modern signal processing used in the spectral estimation in matlab, Calculate the multifractal trend fluctuation analysis, Partial least squares method, For feature extraction, signal de-noising.