Home Forums SYSTEM GPON BER Measurement

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    • #17931
      Shahbaz Qureshi
      Participant

      I have implemented the simulation of GPON based FTTH and have to find the BER. i was wondering if i should use 3R before BER analyzer or connect BER analyzer with PRBS and NRZ pulse generatorr? which method will give the accurate results? Using 3R might overcome the losses occurred because of fiber?

    • #18024
      alistu
      Participant

      Could you upload your simulation file please?

    • #18264
      Ravil
      Participant

      Hi Shahbaz,

      As far as I remember Damian highlighted in one of our forums that its common to use 3R before BER analyzer instead of connecting it with PRBS and NRZ for similar efficiency. Accuracy is a separate question.

      Talking about real GPON systems, I don’t think I’ve seen usage of 3R there… EDFA or Raman amplification should be sufficient.

    • #18265
      Ravil
      Participant

      May give you more details if I see your simulation scheme…

    • #18368
      Shahbaz Qureshi
      Participant

      Hi Ravil,

      Thanks for the information i think i have gotten my answer. Another problem is every time i open BER analyzer the results change. Is it because of the signal index option?

    • #18408
      Ravil
      Participant

      Hi Shahbaz,

      Do you mean that your results are changing without repeating the experiment? Are you changing the number of sweep iteration at all?

    • #18427
      Shahbaz Qureshi
      Participant

      No i am not changing iterations. I am trying to plot a BER curve with received power but i dont seem to get the proper curve. Take a look at simulation attached.

      Attachments:
    • #18432
      Ravil
      Participant

      Unfortunately, I can’t open your file… What version of OptiSystem did you use?

    • #18809
      Shahbaz Qureshi
      Participant

      I have used the OptiSystem 13 version for 64 bit.

    • #18845
      Ravil
      Participant

      Hi Shahbaz,

      ok, I can’t open it with on mine. Are you able to upload a screen shot of your scheme so I can take a look at it?

    • #18850
      Heitor Galvao
      Participant
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