Hi Nguyen, I am unable to open the file. I would like to know why you are using OS12 component? I have contacted the optiwave helpdesk once, where they replied that OFDM 12 block may sometimes give wrong results. Why don’t you use OS13 block instead.
While changing the parameters, did you increase the fiber length?
Tell me the rest of the parameters you are trying in your system, if you are working with DD-OOFDM system.
Regards