How to add white gaussian noise to a signal?

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bob98 2020-10-17

评论： Adam Danz 2020-10-17

I want to add white gaussian noise to a signal x(t) in matlab but i'm quite confused

should i use awgn() function or x+sigma*randn(size(x))+mu

can someone please explain to me what's the difference between the 2 methods and which one should i use ?

Thank you so much!

Adam Danz 2020-10-17

randn merely samples from a normal distribution with mean 0 and std 1. For example, histogram(randn(1,20000))

This answer exaplains the awgn function well,

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