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2 x 2 WDM 64QAM-OFDM

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(joined April 2014)
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hello everybody,
i had designed a 64QAM-OFDM over fiber optic simulation that transmit data on bit rate=120 Mbps for 10 Km , and i had a good result in that simulation , but whene i tried to increase the bit rate to 240 Mbps by using WDM technology ( 2 x 2 ) i didn’t get the right result and i didn’t know why,
i will attach my design here if anybody want to see it , and if anybody can help me please to improve the behavior of the system and get a good result in the receiver side .

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Responses (2):

    • #28387
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      feras
      Participant

      hello everybody,
      i had designed a 64QAM-OFDM over fiber optic simulation that transmit data on bit rate=120 Mbps for 10 Km , and i had a good result in that simulation , but whene i tried to increase the bit rate to 240 Mbps by using WDM technology ( 2 x 2 ) i didn’t get the right result and i didn’t know why,
      i will attach my design here if anybody want to see it , and if anybody can help me please to improve the behavior of the system and get a good result in the receiver side .

      Attachments:
    • #28398
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      alistu
      Participant

      Hi Feras,

      You have mentioned in your post that the system works well for the bit rate of 120 MHz. Can you please upload the file where the system has an acceptable value for BER (and also a good constellation)? I lowered the bit rate to 120 MHz in your file and yet the results were unacceptable.

      Regards

    • #28400
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      feras
      Participant

      hi alistu ,
      actually the system run well on 120 Mbps for one channel ( without using WDM ) but i want to increase it to 240 Mbps by using WDM .
      thank you for your interested

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