Wire and wireless using ofdm

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    • March 3, 2015 at 10:45 am #18166
      sobana a
      Participant

      Hai…
      I need to know whether my simulation setup is correct …..I’m providing equal power to wire and wireless service simultaneously also using FBG for both the service……For wired service i have used OFDM demodulator but for wireless service i just used PIN,and LPF…..I got min BER and eye diagram for wired service….but not able to get for the wireless service….plz check my simulation setup which i have attached with this below…..

      Attachments:
      1. OFDM-UWB-edited-1-wire-and-wireless.osd
    • March 3, 2015 at 12:37 pm #18188
      alistu
      Participant

      Which version of Optisystem are you using? there have been some problems with OFDM blocks in the versions older than 13 I guess.
      have a look:

      OFDM , QAM 64

      +1
    • March 3, 2015 at 10:59 pm #18220
      Dr Rk Sethi
      Participant

      Unfortunately, I can’t open your file with my version of OptiSystem. Can you please attach / upload a screen shot of the project?

    • March 3, 2015 at 11:20 pm #18222
      sobana a
      Participant

      Im using optiwave version 12

      Attachments:
      1. OFDM-UWB-edited-1-wire-and-wireless1.osd
      • March 4, 2015 at 7:49 am #18232
        alistu
        Participant

        I’ve had problems with Optisystem v.12 OFDM blocks too. That’s probably what causes the problem. Please Take a look at the posts made by Damian on the link I gave you.

    • March 3, 2015 at 11:28 pm #18224
      sobana a
      Participant

      screen shots for transmitter, wire and wireless side

      Attachments:

      1. transmitter.png

      2. wire.png

      3. wireless.png

    • March 4, 2015 at 12:10 pm #18262
      sobana a
      Participant

      i need only to access the wireless part..the blocks which i have included whether it is correct for wireless or need to change….

    • March 4, 2015 at 12:48 pm #18269
      alistu
      Participant

      Why don’t you use the Matlab component to make OFDM blocks? That way, at least you are sure the problem is not due to OFDM blocks.

    • March 5, 2015 at 9:44 am #18332
      sobana a
      Participant

      i dont know where i have to insert the OSNR component in optiwave v 13….whether after fiber or befor fiber?

    • March 5, 2015 at 11:11 am #18341
      alistu
      Participant

      That depends.
      Do you want to measure OSNR before or after the the line? Put it there.

    • March 13, 2015 at 2:34 am #18609
      sobana a
      Participant

      Thanks………….For wireless accesss i have been using Optical heterodyne….my demodulator is ofdm demodulator…..but i can,t get the BER and eye diagram…here i have attached my wireless section at receiver side.

      Attachments:

      1. Capture.png

      • March 13, 2015 at 9:28 am #18629
        Damian Marek
        Participant

        Hi Sobana,

        I’ve mentioned this to other users here, but I see that you are using the OS 12 OFDM components, which we kept in OptiSystem 13 for our users. The new OFDM components are highly recommended as they make using them much easier.

        As a side note, if you click the OS 12 OFDM Demodulator and then press CTRL+F the component will be oriented in the right direction.

        Regards

        +1
    • March 14, 2015 at 12:28 am #18648
      sobana a
      Participant

      i’m using optiwave 13…

    • March 16, 2015 at 1:33 pm #18772
      sobana a
      Participant

      whether min BER can be ‘0’???

    • March 16, 2015 at 1:41 pm #18773
      Dr Rk Sethi
      Participant

      Hi Sobana a!
      BER is the ratio of “the number of bits in error” divided by “the total number of bits”.
      therefore its minimum value of the BER can be zero and maximum value can be one.

    • March 17, 2015 at 2:56 am #18798
      sobana a
      Participant

      Whether power should be within -10 to +10 dBm?

    • April 16, 2015 at 10:47 pm #19844
      sobana a
      Participant

      in optiwave 13 whether multiple graphs can be drawn…like comparison between RZ and NRZ , OFDM with and without FBG…..

    • April 17, 2015 at 12:22 am #19847
      Abhishek Shrama
      Participant

      you can take any value of power but as you increase power non-linear effects come into play.it also increase the calculation time

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