SAC OCDMA

[M. E.]

Hi 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
mohamed

Attachments:

1. results.docx

[Damian Marek]

Hi,

Could you please attach your project file and a link to the article you are trying to reproduce?

Thanks

[M. E.]

thank you very much for your help , the article that i want to produce in this paper figure 4
best wishes

Attachments:

1. SAC-OCDMA.osd
2. PERFORMANCE-ANALYSIS-OF-A-NEW-CLASS-OF-CODES-WITH-FLEXIBLE-CROSS-CORRELATION-FOR-SAC-OCDMA-SYSTEM.pdf

[Damian Marek]

I 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.

[M. E.]

how can i change it , iam new user on this simulator ??
and i don’t think that is a problem

[Damian Marek]

Hi,

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

[Salwa Mostafa]

hi ek4m
can you help me in representing code in system , i have a problem obtaining results

Attachments:

1. Project3.osd
2. Performance-of-SAC-OCDMA-FSO-communication-systems1.pdf

[M. E.]

thank you very much prof. Damian, i will try at this problem again

[M. E.]

Salwa you can inbox ek4m2005@yahoo.com

[M. E.]

Salwa can you be specific

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