Need help with OFDM noise module

Hello, I need help with a telecommunications issue. I am having trouble finding the correct way to implement noise in an OFDMA module. I am trying to construct the module from scratch. I believe I have an accurate working model up until I add noise to the system.

I need some help or guidance on how to accurately represent noise in this system. Any help will be greatly appreciated. Code is uploaded.

Answer 1

[Navya Seelam]

I suppose you think your model is inaccurate because BERtheory and BERarray does not match. This is because you are performing ber analysis over small data sets. Try increasing nbits and perform the analysis to see that BERtheory and BERarray match.