基于Teager-Kaiser能量算子的肌电信号降噪方法（MATLAB）
Teager-Kaiser能量算子是一种非线性算子，它能有效提取信号的瞬时能量，对信号瞬时变化具有良好的时间分辨率。Teager-Kaiser能量算子只需信号三个采样点，即可快速跟踪信号的幅值和角频率变化，计算实现简单、运算量小。
clc
clear all
close all
load emg4TKEO.mat %import data
%% Apply TKEO
emgfilt=emg; %initialize filtered signal
for i=2:length(emgfilt)-1 %do not consider first and last time points to avoid edge effects
emgfilt(i)=emg(i)^2-emg(i-1)*emg(i+1); %TKEO
end
%% Convert to zscore
time0=dsearchn(emgtime',0); %find timepoint 0
emgZ=(emg-mean(emg(1:time0)))/std(emg(1:time0)); %zscore of original emg signal
emgfiltZ=(emgfilt-mean(emgfilt(1:time0)))/std(emgfilt(1:time0)); %zscore of filtered emg signal
%% Plot
emgnorm=emg./max(emg); %normalize original emg signal
emgfiltnorm=emgfilt./max(emgfilt); %no原文地址：https://blog.csdn.net/weixin_39402231/article/details/140154534
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