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Generate noise signal with min and max amplitude

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Sabella Huang
Sabella Huang 2022 年 7 月 4 日
コメント済み: Sabella Huang 2022 年 7 月 5 日
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

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Image Analyst
Image Analyst 2022 年 7 月 4 日
Try this:
sigma = 1.1;
r = sigma * randn(100000, 1);
histogram(r)
grid on;
xticks(-5:5)
  3 件のコメント
Image Analyst
Image Analyst 2022 年 7 月 4 日
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
Sabella Huang 2022 年 7 月 5 日
Ok, I got it. Thanks for your help

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