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DPSK-WDM

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(joined September 2014)
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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

Responses (3):

    • #14089
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      mani
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      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

    • #14100
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      Damian Marek
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      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

    • #14178
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      mani
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      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

    • #14216
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      Damian Marek
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      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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