adding noise signal to orginal signal

sir, how to add a 30 db noise signal to three phase signal.

Answer 1

[Rick Rosson]

Do you have access to the Communications System Toolbox?

If so, you can use the awgn function. For more information:

   >> doc awgn

If not, you can use the randn function. For more information:

   >> doc randn

HTH.

Rick