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OOK vs BPSK

(joined April 2020)
Participant

Hello. I am working on a VLC project which compares the performance of OOK and BPSK modulation. I have made a simple system with externally modulated LEDs where one setup is modulated at bit rate = symbol rate for OOK and the other setup is modulated at bit rate = 2 * symbol rate for BPSK. I have attached my .osd file below. I expect the BER of BPSK to be better than that of OOK when plotted against OSNR (dB). My results are not consistent with the theoretical results. I am unable to identify the source of this issue. Please help me resolve the problem to get consistent results.

Thank you.

Responses (3):

    • #67625
      Shivaranjani S
      Participant

      Hello. I am working on a VLC project which compares the performance of OOK and BPSK modulation. I have made a simple system with externally modulated LEDs where one setup is modulated at bit rate = symbol rate for OOK and the other setup is modulated at bit rate = 2 * symbol rate for BPSK. I have attached my .osd file below. I expect the BER of BPSK to be better than that of OOK when plotted against OSNR (dB). My results are not consistent with the theoretical results. I am unable to identify the source of this issue. Please help me resolve the problem to get consistent results.

      Thank you.

    • #67632
      Profile Photo
      Ahmad Atieh
      Moderator

      Hello,
      The symbol rate should equal to the bit rate in both cases.
      The forum doesn’t allow users to upload OptiSystem projects. You may email it as a zip file to my email at ahmad.atieh@optiwave.com
      Regards,
      Ahmad

      +1
      • #67633
        Shivaranjani S
        Participant

        Hello Ahmad Atieh Sir,

        Thank you for the response. I have changed the bit rate. I have mailed you the details of my project and the .osd file. Thanks in advance.

    • #67634
      Profile Photo
      Ahmad Atieh
      Moderator

      Hello Shivaranjani,
      I didn’t receive your file. Please make sure that you send it as a zip file.

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