DPSK-WDM - Optiwave

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This topic has 3 replies, 2 voices, and was last updated 10 years, 1 month ago by Damian Marek.

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- October 8, 2014 at 4:42 am #14089
  
  mani
  Participant
  
  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
- October 8, 2014 at 12:57 pm #14100
  
  Damian Marek
  Participant
  
  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
- October 11, 2014 at 9:58 am #14178
  
  mani
  Participant
  
  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
- October 14, 2014 at 12:14 pm #14216
  
  Damian Marek
  Participant
  
  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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