[Deepanshu sharmaParticipant]

hello Damian,

can you please provide me some links or some file related with polarization multiplexing for the same.

Regards

[Deepanshu sharmaParticipant]

hello Damian,

This is not my exact project.. i am using some new technique to provide orthogonality to the transmitter separately.. u can check the two files attached below where i am able to get a good constellation after using my technique format.but spectral eff is just 0.6 bits/s/hz. the question is how i can improve its spectral eff more.

Attachments:

1. 

   qpsk_vy.png
   

2. 

   qpsk_ortho.png
   

[Deepanshu sharmaParticipant]

hello Damian,

for spectral efficiency, i am just using the basic formula i.e., bit rate divide by the spacing between the transmitters.

[Deepanshu sharmaParticipant]

hi Ravil,

can u help me what is the achievable spectral efficiency till now for qpsk. actually i am getting a max of 0.5 bits/sec/hz through wdm qpsk based on constellation diagram. i am not calculating the fruitfulness of the receiving signal through BER analyzer because its not appropriate for advance modulation schemes and not BER Test set because it will not helpful for high data rate due to its limitation regarding Bits. It will be a great help if you can help me to enhance its spectral efficiency. please check the attachment

[Deepanshu sharmaParticipant]

Hello Rahul Vyas,

Thanks for sharing your project.But i have some queries related with the same., why the constellation diagram at reciever side is not appropriate ??. i mean when we have to deal with QPSK then one of the main thing to detect the signal correctly is its constellation diagram.u can also check the attachment and let me know if i am wrong.

Regards
Deepanshu Sharma

Attachments:

1. QPSK_VYAS.osd

[Deepanshu sharmaParticipant]

hello RK sethi,

Thanks for ur responses.

[Deepanshu sharmaParticipant]

hello RK sethi ,

I can give you the link of that particular article.but i would like to know is there any affect of DD method on the spectral efficiency as given in dat particular article. please check the attached link.

http://www.lightwaveonline.com/articles/print/volume-30/issue-5/features/which-optical-modulation-scheme-best-fits-my-application.html

[Deepanshu sharmaParticipant]

Can you please tell me the modelling behind optisystem FSO component ??.. how it will work when we use 6 WDM transmitted input and then pass it through FSO channel ??