DPSK-WDM

[mani]

can anybody please suggest , why iam not getting any BER curve from BER Analyser_1 (193.2 THz)..kindly refer to the attached file .. iam trying to make 2 channel DPSK WDM system working at 40gbps..thankss alot..
mani

[Damian Marek]

Hello,

I fixed it by switching the two inputs to the subtractor in the second receiver. This basically multiplies the output by minus 1. However, I am not sure why it has to be switched. Maybe because they accumulated different phase shifts?

Regards

[mani]

well..thanxx damain..i got the result..Also please do answer, if there exists any method to see the result loop wise..for eg..say im running system for 20 loops ..after solving, i will get final BER/Q factor values that will be generated after 20 loops..now if i want to check what was the q factor value after 15 loops in the same run, is it possible to do that or i have to re-run the simulation for 15 loops .. Please answer as this is going to save a lot of my time..
thanks once again..
regards

[Damian Marek]

You could run a parameter sweep for different loop numbers and plot the BER as a function of the loops. I think that is the best way to do what you want.

Regards

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