Problem in AWGN command

I have two matrices A and xx.. The dimension of the matrix A is 9 x 3 complex double and that of xx is 3 x 500 complex double. The product of A and xx is X1 whose dimesnion is 9 x 500 complex double.

Now I want to generate a noise matrix of the same dimension i.e., 9 x 500 complex double using the command awgn() and add to X1. How can we generate this noise?

Answer 1

[Image Analyst]

I'd use it twice. Once to apply to the real part, and again to apply to the imaginary part.

[Sadiq Akbar]

Thank you very much for your kind response. You mean like this:

A;   %  9 x 3 complex double
xx; %  3 x 500 complex double
X1 = A * xx;  % 9 x 500 complex double
X=awgn(X1,40)+j*awgn(X1,40);

[Image Analyst]

Try it. I'd do

X = awgn(X1, 40) + 1i * awgn(X1, 40);

[Sadiq Akbar]

Thank you very much for your help.