HHT谱图像问题。求指导

emdemd

利用g。rilling的程序对y = cos(2*pi*100*t) + 0.4*cos(2*pi*20*t)+0.4*cos(2*pi*200*t);这个信号进行了分解。
20Hz处很清楚。但是200Hz处的频率并不是很清楚。不知道为什么。求指导。。

Gear

did you decomposed the signals using EMD method? if yes, some of the troubles with EMD are unavoidable. HHT has not been put forward for long time, so it contains some theoretical problems, such as envelop and mean curve fit, boundary effect, modes mix and so on. thanks !

jiangwj

方便看一下代码吗