- This topic has 4 replies, 3 voices, and was last updated 8 years, 8 months ago by Ranjeet Kumar.
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February 10, 2016 at 3:32 pm #29549gaganpreet KaurParticipant
Can anybody share design of WDM system in MATLAB. i want ot implement a coherent system model . but i don’t know how to design in MATLAB. even in optisystem when it comes to WDM system design we dont have choice of using advanced modulation formats as we can do for NRZ, RZ from drop down menu in parameters of WDM transmitter we need to separately apply our modulation at each single channel. this becomes tiring and cumbersome for channel count grater than 16 channels.any solution pls?
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February 10, 2016 at 9:17 pm #29553alistuParticipant
Hi Gaganpreet,
The choice of using between RZ and NRZ are actually available in OptiSystem (I know about OptiSystem 13). When you open WDM transmitter component properties, you can choose “coding” tab and there you can see the “modulation type” options, where you can choose between RZ, NRZ and Off.
Regards
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February 12, 2016 at 1:32 pm #29658gaganpreet KaurParticipant
Thank you so much alistu. but my concern is not using RZ /NRZ or ofn-off keying but as we increase dat rate upto 100 Gbps or 112 Gbps obviously we need modulation formats which accomodate more than 2 bits per symbol such as QAM, PM-DPQSk etc which require a coherent detection system. it is ok to see output by putting all for single channel and checking the output(though i hhhave not tried) but whenever i start design and with all recent research available if i intend to design a 100 channel WDM high data rate system with these advance modulation formats it is tiring to design or externally connect transmitter to each channel. i want to know if i can design such system using a single module as WDM transmitter and simply chosing a new format .
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February 12, 2016 at 9:40 pm #29666alistuParticipant
You’re welcome Gaganpreet. My perception was from your sentence “… we dont have choice of using advanced modulation formats as we can do for NRZ, RZ …” (even though this was right; we can’t choose advanced modulation formats other than RZ and NRZ). However, there is no other way to consider coding after WDM transmitter as you have mentioned as far as I am concerned.
Regards
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March 5, 2016 at 1:00 am #31568Ranjeet KumarParticipant
We have choice of using between RZ,NRZ,CSRZ, MDRZ,DRZ are actually available in OptiSystem.
HERE i am attaching osd files of MDRZ, CSRZ AND DRZ wdm mux.
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