Calculation of BER using BER test set - Optiwave

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This topic has 2 replies, 2 voices, and was last updated 10 months, 3 weeks ago by Prakhar Sharma.

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- December 25, 2023 at 2:43 pm #85369
  Prakhar Sharma
  Participant
  Hi all,
  I’m trying to study the BER value after the application of LDPC FEC scheme in A FSO link, but, for some i’m always getting the value of BER close to 0.5 which is not acceptable. I have feeling it has something to do with “Sequence length for BER per iteration” value in BER test set. I’ve attached the osd file below. Any sort of help would be really appreciated.
  - This topic was modified 11 months, 1 week ago by Ahmad Atieh.
  - This topic was modified 11 months, 1 week ago by Ahmad Atieh.
- January 2, 2024 at 8:35 am #85456
  
  Ahmad Atieh
  Moderator
  
  Dear Prakhar,
  I’ve checked the example (Direct Detection OFDM 4 QAM over FSO with LDPC.osd) as shown in the attached image. It is working fine. Let me know if you have any other question.
  Regards,
  Ahmad
  - January 6, 2024 at 3:25 pm #85476
    
    Prakhar Sharma
    Participant
    
    Hello sir,
    Thank you, sir, for your reply. However, I wanted to know whether the layout I attached earlier was correct or not. Every time I simulated the layout, it gave BER close to 0.5. So, I wanted to know what changes I can make in the BER test set to lower the BER.
    Thanks and regards
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