Generating baseline wandering noise

How to generate baseline wandering noise in matlab code?

Answer 1

[Star Strider]

Here is one way:

t = linspace(0,10*pi,1000);
s = sin(t);
sn = 0.3*cos(t./4);

figure(1)
subplot(2,1,1)
plot(t, s)
title('Signal with constant baseline')
grid
subplot(2,1,2)
plot(t, s+sn)
title('Signal with with wandering baseline')
grid

[Tinkul]

thank you sir...Little bit doubt is here...You have takena signal sin signal and cos signal to get baseline wandering noise. I have 20 samples for eg

 A=[-0.165
-0.155
-0.195
-0.205
-0.185
-0.155
-0.135
-0.095
-0.075
-0.065
-0.065
-0.125
-0.125
-0.125
-0.115
-0.125
-0.165
-0.115
-0.145
-0.115]

For these samples i want to generate baseline wandering noise...How can i do it.....Please help....

[Star Strider]

Change this line to produce a 20-element vector:

t = linspace(0,10*pi,20)';
sn = 0.5*cos(t./3)*(max(A)-min(A));

figure(1)
plot(A,'-b')
hold on
plot(A+sn,'-r')
hold off

The sn assignment generates the baseline noise, so all you need to do to generate your code with a wandering baseline is to add your signal to it. This code should work for your signal. Only you know what you need, so feel free to change it as necessary.