I appreciate your help Damian. I modified the Matlab codes the way you told me. Now while simulating, there comes an error stating there is a problem with output signal type. This is not a problem I can solve just by being familiar with Matlab. It concerns having a deep understanding of how the Opti vector system works, which is not unfortunately given by the available tutorials. Is there any way I can import the Optisystem OFDM block into Matlab? Or perhaps contanct the Optisystem programmers? Thank you.
Here I have attached both my modified .M file and Optisystem block diagram with Matlab component.