Forum Replies Created

    #31529
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    Metin Ozturk
    Participant

    I have solved the problem.

    “Convert Noise Bins” was not activated.

    Thank you.

    #31525
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    Metin Ozturk
    Participant

    I saw that it is not about OFDM.

    Then, what can be the problem?

    #31490
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    Metin Ozturk
    Participant

    Hi.

    When we perform multi-itaration, we do not change any parameter. So, SNR, BER, and OSNR values are very close for each iterations.

    In my opinion, this does not make any sense.

    How can we plot BER/SNR graph?

    Regards.

    #31277
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    Metin Ozturk
    Participant

    Thank you for your interest.

    When I change the CW Laser power to 50 dBm, desirable results obtained. But, I do not know, 50 dBm power for laser is OK or not?

    #31037
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    Metin Ozturk
    Participant

    I really thank you for your help.

    I attached the file. Channel and CW Laser are changed.

    Thank you again.

    #31034
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    Metin Ozturk
    Participant

    Thank you for your answers.

    Alitsu, that system is working well, but when i change the CW Laser parameters as Frequency=550 nm and Linewidth=300 GHz to cover whole visible range, results get worse. Do you have any idea aout this?

    Thank you.

    #31032
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    Metin Ozturk
    Participant

    Hello Damian.

    Your file 64QAM OFDM is OK, but when I change the parameters of CW Laser to the Visible Light conditions such as Frequency=550 nm and Linewidth=300 GHz, BER becomes unaccaptalbe. I choose those parameters to cover whole visible range like white light.

    Thank you.

    Best Regards.

    #30781
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    Metin Ozturk
    Participant

    I attached my system file.

    Could you please help me regarding DSP block?

    Thanks.

    #30780
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    Metin Ozturk
    Participant

    Hi Sam.

    Thank you for your answer.

    Could you please help me inserting DSP to my system?

    How can I do this?

    Thanks.

    #22027
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    Metin Ozturk
    Participant

    Also, my screenshots are in the attachment.

    Thank you for your valuable help.

    #21998
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    Metin Ozturk
    Participant

    Dear Ravil and Sam Sung.

    I attached my file. In this file, i tried to re-arrange an optisystem example from this website.

    My problems:

    1) I cannot LED as a light source. Also, I cannot use laser for visible range. Both of them gives no result or bad results.
    2) In this file, if i use 4-QAM, there is no problem. But, if I use 16-QAM, i cannot get acceptable results.

    Thank you.

    Regards.

    #21857
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    Metin Ozturk
    Participant

    Thank you Bryan.

    I have just send an e-mail.