EMD 算法的目的在于将性能不好的信号分解为一组性能较好的 IMFs 这里 IMF 须满足如下两个性质 1 信号的极值点 极大值或极小值 数目和过零点EMD 算法是 HHT

的核心算法之一 用来将信号分解为一组性能较好的固有模

态函数(IMF) 以便进行 Hilbert 变换

数目相等或最多相差一个

2 由局部极大值构成的上包络线和由局部极小值构成的下包络线的平均值为零

用于心电信号处理-The purpose of EMD algorithm is that the bad performance of the signal is decomposed into a set of better performance of IMFs where the number of extreme points IMF must satisfy the following two properties of a signal of maximum or minimum value and zero crossing EMD algorithm is HHT

One of the core algorithm is used to signal is decomposed into a set of intrinsic mode better performance

State function (IMF) for the Hilbert transform

A difference of one or at most equal to the number

Average of two upper envelope constituted by the local maxima and local minima of the lower envelope constituted zero

For ECG processing