how to add Additive White Gaussian Noise (AWGN) in signal.

[josephkirmani]

Can anybody guide me how to add Additive White Gaussian Noise (AWGN) to the signal. I want to add AWGN to ModulatedSig (in the attached VI) and then give AWGN to received  signal of demodulation module. See attach file.

thanks

JK

[altenbach]

Just create a gaussian white noise signal of the same lenght and add it.