如何删除指数信号的波纹

Question

我有以下数据，对应于“嘈杂”的指数形信号。 是否有任何简单/直观的方法来消除它的噪声/纹波以获得干净的信号（如过滤）？

感谢任何帮助！

Answer 1

Use median or averaging filters. For example this is from MATLAB's examples:
https://www.mathworks.com/help/signal/ref/medfilt1.html 

% Create the signal 
fs = 100;
t = 0:1/fs:1;
x = sin(2*pi*t*3)+0.25*sin(2*pi*t*40);

% Filter 
y = medfilt1(x,10);

%Plot the result 
plot(t,x,t,y);
legend('Original','Filtered');
legend('boxoff');