how to export the data from optisystem to matlab

[Joseph Jiang]

hi everybody.i want to know how can i export the data from optisystem to matlab.i want to calculate the SNR as i signed from the picture i attached.by the way, how can i extinguish the signal and noise if i select “convert to noise bin”.thank you all of you in advance.

[Ravil]

Hi Joseph, the best way to do it is to add a signal fork at the location at which you would like to retrieve the data. This fork should be connected to Matlab component. A Matlab file will be created.

[Joseph Jiang]

hi，ravil，thankyou for your reply！what i really want to know is how to write the matlab code to export the data to calculate the SNR！

[Ravil]

In my opinion, you can create an m-file that reads in an your signal and horizontally concatenates the vector (from each sweep) to an array (thus creating a large signal array representing all the sweeps). For example, a “SweepNum” parameter is first setup in the global parameters (from 1 to N), followed by the “Amplitude” of your Oscilloscope Visualizer…

[Joseph Jiang]

dear ravil.i understand you,however i am not familar the matlab code in cosimulation in optisystem and matlab especially the interface between optisystem and matlab.can you help me?thank you!

[Damian Marek]

Your first step should be to understand how the co-simulation works! Although not hard it can be a bit confusing. Two things I would suggest is first reading about data structures in Matlab in the help section and searching the forum here for Matlab examples.

There is also a youtube video we made about the process:

Matlab Binary Switch

Regards

[Joseph Jiang]

hi DAMIAN,I HAVE TRIED ALL you said including searching all about cosimulation between optisystem and matlab in the forum and i can understand all the examples in the help doc.however if i tried to write matlab code to export data to matlab,i found it is a little hard.and i have another question is that how can i calculate the SNR if i had export the data when the global parameter setting “convert noise bin”.thank you!

[Ravil]

If you are working with multiple sweeps a signal-vector array will be created. Matlab file will be linked to the name of your visualizer…

[Ravil]

According to your 2nd question, did you consider the ‘Signal’ and ‘Noise’ tabs of your visualizer screen?

[Joseph Jiang]

RAVIL，AS you know，if we select the global parameter，the signal and noise would transmitted together，so it is necessary to extinguish what is signal and what is noise to get the SNR as i refered to.

[Ravil]

Joseph, as an example, here is the matlab code which I used for multiple sweeps of pulse generator (with the parameters I defined above)

i = SweepNum;
SignalVector = InputPort1.Sampled.Signal’;
if i == 1
TotalSignal = SignalVector;
else
TotalSignal = horzcat(TotalSignal,SignalVector);
end

If I get the code for your case I’ll let you know. Good luck!

[Joseph Jiang]

thank you RAVIL.

[Jamal]

Ravil,
I tried this code, it works fine for one iteration, but for the next, it is giving me the error of mismatched matrix dimensions.
Any solution for that ?

[Jamal]

Joseph Jiang, I’d like to know if you were able to find the snr in matlab.

[SAHIL SINGH]

Hi Ravil and Damian,

Thanks for such a valuable information…

Regards

Sahil Singh

[MHD NA]

you can create an m-file that reads in an your signal and horizontally concatenates the vector (from each sweep) to an array (thus creating a large signal array representing all the sweeps). For example, a “SweepNum” parameter is first setup in the global parameters (from 1 to N), followed by the “Amplitude” of your Oscilloscope Visualizer.

[Rajguru M. Mohan]

Hi Jiseph,
I don’t think that we could export data from optisystem to MATLAB.
Although i could design the networks using MAtlab code.

Thanks,

[Author]

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