- This topic has 9 replies, 3 voices, and was last updated 9 years, 1 month ago by
M. E..
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July 14, 2014 at 8:36 am #12359
M. E.
ParticipantHi every one,
I have a problem in Spectral Amplitude Coding (SAC) OCDMA , i want to plot BER vs. user optical power, i make sweep for each user from -60 dBm to -5 dBm and plot it, but the output result isn’t as i want .. i think that there is some thing wrong
can any one help me
regardes
mohamedAttachments:
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July 18, 2014 at 9:04 am #12564
Damian Marek
ParticipantHi,
Could you please attach your project file and a link to the article you are trying to reproduce?
Thanks
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July 19, 2014 at 6:39 am #12583
M. E.
Participantthank you very much for your help , the article that i want to produce in this paper figure 4
best wishesAttachments:
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July 23, 2014 at 2:50 pm #12844
Damian Marek
ParticipantI am not an expert on SAC-OCDMA techniques, but if you are trying to reproduce that figure I believe you are going to need to change the project layout to reflect the different code scheme. In our system example that you attached we are using MQC code, whereas in your attached example they use FCC code.
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July 23, 2014 at 6:33 pm #12851
M. E.
Participanthow can i change it , iam new user on this simulator ??
and i don’t think that is a problem-
July 24, 2014 at 10:35 am #12884
Damian Marek
ParticipantHi,
FCC code, I believe will have overlapping spectral content because of the choice of weighting and code length. I found two papers that I think can help you out changing the fiber gratings.
1. http://www.copl.ulaval.ca/fileadmin/copl/documents/documents/Publications-PDF/Rusch/journ56.pdf
Gives a great overview of SAC-OCDMA
2. http://www.sciencedirect.com/science/article/pii/S1877705813001744
You will need access for this paper but it explained the coding of FCC.
If you want to make a 3 user system I think it will simply amount to removing 1 grating on the transceiver side and you will have to choose the the remaining grating’s parameters to coincide with FCC.
Regards
+1
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August 7, 2014 at 10:08 pm #13089
Salwa Mostafa
Participanthi ek4m
can you help me in representing code in system , i have a problem obtaining results -
August 20, 2014 at 9:37 am #13372
M. E.
Participantthank you very much prof. Damian, i will try at this problem again
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August 20, 2014 at 9:38 am #13373
M. E.
ParticipantSalwa you can inbox ek4m2005@yahoo.com
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August 20, 2014 at 9:51 am #13375
M. E.
ParticipantSalwa can you be specific
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