Reply To: how to design code shift keying OCDMA ??

[Karan AhujaSpectator]

I want to add that the spectral frequency pattern, with spectral chips centered about the grating frequencies, is determined by signature code properly written in the FBGs. The receiver end applies a matched series of FBGs and a balanced detector for computing correlation difference. The user’s bit stream can now be extracted.The diagram below shows the receiver-end for one of the users, where the received signal is split into an upper branch (FBGs are the same as the encoder) and lower branch (FBGs are the complement of the encoder).

You may go through these links for further study. These will surely help

OCDMA Network Design

https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0ahUKEwjThfSJttnNAhVDj5QKHSDzA-EQFgg-MAQ&url=http%3A%2F%2Flink.springer.com%2Fbook%2F10.1007%252F978-3-540-68468-8&usg=AFQjCNGM6rS90qgsECK6XlcHwLLp3Nxrlg&bvm=bv.126130881,d.dGo

Optical Code-Division Multiple-Access System (OCDMA)

Thanks