I managed to open the new file, thank you. I lowered the bit rate of this system to 10Gbps and now I am facing a BER of around 0.4, so there still seems to be problem (I didn’t get the part you mentioned gain, so I don’t know if I have to manipulate gain). I had not worked with the new OFDM components. There is another problem addressed by Chee in another forum, which occurs when he set maximum number of subcarriers to 1024. Could you please make a comment on that. Thank you again.