DSP

[Areej Al-SaffarParticipant]

Hi
How can i use DSP component for PS-QPSK ???
To allow me increase fiber length.

[Abdallah IsmailParticipant]

I think the dispersion is the main difference.
Select the dispersion tap in DSP and write your length.

+1

[Areej Al-SaffarParticipant]

I did it but the result very bad in constellation.

[Dr Rk SethiParticipant]

How are you using DSP component for PS-QPSK, for increase fiber length. Can you attach the screen shot of the same. which version are you using? The new version of OptiSystem 13.0 has a new Universal DSP component with a complete suite of DSP algorithms (including a new nonlinear compensation model) for analysing various modulation formats.
Regards.

+1

[Alessandro FestaParticipant]

Hi Areej, can you post your configuration and DSP settings?

[RavilParticipant]

Hi Areej,

The transmission length is increased due to chromatic, PMD compensation as well as mitigation of nonlinear effects. If I am not mistaken, the main techniques for mentioned compensations are forward error correction (FEC), up-sampling and Nyquist prefiltering and equalization of a transmitter frequency response. I agree with Rk Sethi that OptiSystem 13.0 has more advanced DSP than previous versions do.

[Dr. MohammadMahdi AriannejadParticipant]

can anybody describe what is DSP exactly? and what it can be helpful? maneythanks