Home Forums SYSTEM SAC-OCDMA

SAC-OCDMA

Profile Photo
(joined July 2014)
Participant

Good day every one,
I am very interested in OCDMA. So now i start working in that area.i attach my design with this.In that design i doesn’t get any output in BER analyzer.So kindly help me to improve my design sir..

How to improve my knowledge in that area?

please guide me sir..

Attachments:

Responses (9):

    • #13840
      Profile Photo
      vignes
      Participant

      Good day every one,
      I am very interested in OCDMA. So now i start working in that area.i attach my design with this.In that design i doesn’t get any output in BER analyzer.So kindly help me to improve my design sir..

      How to improve my knowledge in that area?

      please guide me sir..

      Attachments:
    • #13853
      Profile Photo
      Damian Marek
      Participant

      Hi Vignes,

      You should center the LED frequency in the middle of your range (194.05 THz) and you also need a larger samples per bit (~512). Furthermore, check all of the WDM Demux and especially the WDM Mux in your design. The channel frequencies are not matching.

      There is a very similar topic at:

      optiwave

      where I highlight and explain the reasons for this.

      Cheers

    • #13964
      vigneswaran
      Participant

      How can I include the Multi Diagonal code in ocdma systems? please guide me

    • #13963
      vigneswaran
      Participant

      Dear Damian,
      I change the frequencies and check all the components as u told me. but I didn’t get output, so please guide me

      • #13971
        Profile Photo
        Damian Marek
        Participant

        Please attach your most recent modified project file and I’ll take a look.

    • #14011
      vigneswaran
      Participant

      dear demian
      i attach my recent design….

      Attachments:
      • #14013
        vigneswaran
        Participant

        dear damian,
        this is my paper,i also have another doubt,

        1. how to design a encoder section.

        Attachments:
        • #14019
          Profile Photo
          Damian Marek
          Participant

          Hi Vigneswaran,

          From the paper’s description of MD code I think your encoder is incorrect. For example your first user has f1, f2, f3, f4, f5 and your second has f6, f7, f8, f9, f10. If following the paper and assuming 5 users with a code weight of 4 the code should be: user 1-> f1, f10, f11, f20 user 2-> f2, f9, f12, f19 etc…

          Your receiving filters and multiplexers can then be user 1-> f1 user 2-> f2 etc…

          Try this out!

        • #14169
          vigneswaran
          Participant

          dear damian,
          i do my design as you said,but i did’t get output in ber analyzer…plz guide me

        • #14232
          Profile Photo
          Damian Marek
          Participant

          Follow the signal from the input to the output by using optical spectrum analyzers to make sure that all filters and demuxes are filtering the correct bands. I can’t say much more without your project file.

          Regards

Login You must be logged in to reply to this topic.