今天看了些EMD信号分解方面的东西，matlab官网上有个Hilbert-Huang Transform的代码，代码效率极高啊，人家3句语句就解决了一个大问题，很牛啊！还有一个GRilling的EMD工具箱，好多文件，功能应该相当强大。

这里研究了研究matlab官网的代码，加了些注释、功能演示，效果如下

原始信号由3个正弦信号加噪声组成，如下-Today looked at some of the EMD signal decomposition of things, matlab official website has a Transform Hilbert-Huang code, the code efficiency is very high, ah, the people of the 3 sentence to solve a big problem, it is cattle ah! There is a EMD GRilling toolbox, a lot of documents, the function should be quite strong.

Here to study the Matlab s official website code, add some notes, function demonstration, the results are as follows

The original signal is composed of 3 sinusoidal signals with noise, as follows