Generate noise signal with min and max amplitude

Hello Guys,

I want to ask about, how to generate noise signal with Gaussian distribution and have an output amplitude range of [-4 4]?.

Thank you

Answer 1

[Image Analyst]

Try this:

sigma = 1.1;
r = sigma * randn(100000, 1);
histogram(r)
grid on;
xticks(-5:5)

[Sabella Huang]

Hello sir, thanks for you answer. This code is worked for me. I would like to ask you about how do you determine the sigma on your code?. Thx sir

[Image Analyst]

I just picked it arbitrarily. As you know gaussians go from -infinity to +infinity and sigma just determines the spread of the hump. If you need to clip values to [-4,4] you can do that. Or you can delete them from the array - whatever you want. Try changing sigma and running my little snippet and see what happens.

sigma = 5;
r = sigma * randn(100000, 1);
histogram(r)
grid on;

sigma = 0.3;
r = sigma * randn(100000, 1);
histogram(r)
grid on;

[Sabella Huang]

Ok, I got it. Thanks for your help