Problem in finding BER

[muhammad saqlain]

Dear All,i am working to design 60GHz mm-wave carrier with the following targeted specifications:data rate=6-7Gb/s, input electrical signal=30 GHz and Fiber length=40 km etc.Everything is fine,as i got the better RF spectrum spike at 60GHz (near -10dBm with 40 km fiber length).But i am unable to find any BER value with 40 Km length.Although i have calculated some worse BER value e.g.10-2 for 30-37km fiber length(i think it might be more better).Might be i need to set global parameter and synchronize it with experimental value (like sequence length and samples/bit ) and i am not good in parameters setting.Please see the snap shot block diagram of my work and suggest me better modifications.Thank you!

Regards,
Muhammad Saqlain

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