Problem with VLC-OFDM system - Optiwave

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This topic has 2 replies, 2 voices, and was last updated 4 years, 5 months ago by Nabadh Bhan.

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- December 24, 2020 at 7:09 am #68646
  
  Nabadh Bhan
  Participant
  
  Hello everyone,
  I want to design an indoor based communication system. I am working on a VLC-OFDM system. I used the FSO OFDM QAM file of Optisystem 17.1 and replaced the laser with a LED. Hoping to get a good BER in range of 1 to 10 meters but I am not able to. BER test set always shows extremely high values like 0.5. Could anyone please help me with my project, I am fairly new to the software and still learning it.
  The file is attached. I would really appreciate some help.
  Thanks in advance
- December 24, 2020 at 7:13 am #68649
  
  Ahmad Atieh
  Moderator
  
  Dear Nabadh,
  The issue could be related to the data rate that you are using. You know that the LED is a noncoherent light source and has limited modulation bandwidth. Try to lower the rate and check the performance.
  You may send me your file as a zip file to ahmad.atieh@optiwave.com and I’ll check it out and provide feedback. Unfortunately, you can’t upload OptiSystem project on the forum.
  Regards,
  Ahmad
  - December 26, 2020 at 2:26 am #68651
    
    Nabadh Bhan
    Participant
    
    Dear Respected Sir,
    
    I tried changing the data rate sir but I am still unable to get the appropriate BER.
    I have mailed you on the ID provided Sir.
    
    Thanking You
    Kind Regards
    Nabadh
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