Adding noise vector in Matlab

Can anyone tell how to add mutually uncorrelated local channel noise vector and global channel noise vector in MATLAB coding?

Noise vectors n ∼ N(0,Rn) and w ∼ N(0,Rw)

Answer 1

[Star Strider]

The Communication System Toolbox has the awgn function. Otherwise, I would use the randn function.

So for example you would define:

n = Rn*randn
w = Rw*randn

with the appropriate ‘size’ arguments to match your vectors.

[zephr nine]

Thank you! and what would be Rn and Rw?

[Star Strider]

My pleasure!

In my example, ‘Rn’ and ‘Rw’ are the standard deviations. If you define them instead to be variances, my example changes to:

n = sqrt(Rn)*randn
w = sqrt(Rw)*randn

in order to be consistent with the documentation for randn.

[Star Strider]

I cannot help you with that, unfortunately. Communications engineering is not an area of my expertise.

I suggest you post that as a new Question, as it is not directly related to this one.