Experimental Data on PM-16QAM Long-Haul Transmission (after DSP)

This data set contains received signal data collected from an experimental campaign with multi-subcarrier PM-16QAM signals transmitted over long-haul distances. The aggregate symbol-rate of each PM-16QAM signal is 24 GBaud, with 31 channels being transmitted in a 28 GHz grid. Propagation is performed over PSCF fiber spans with 108.25 km per span. Long-haul transmission is achieved by using a recirculating loop composed of 4 spans of fiber and inline EDFA-only amplification. For further details on the experimental setup, please refer to the following open-access publication:
https://doi.org/10.1364/OE.25.004298

This data set comprises received optical signals after received-side digital signal processing for the following range of parameters:
    1, 2, 4, 6, 8 and 12 subcarriers
    4 to 7 recirculations;
    -1 dBm, -0.5 dBm, 0 dBm, 0.5 dBm, 1 dBm and 2 dBm launched power;
    3 independent aquisitions (trials)

The file names of the received signals follow the convention:

Srx_<nSC>SCs_<Ptx>dBm_<nRec>recs_trial<trialNum>_<string>.mat

where <nSC> is the number of subcarriers, <Ptx> is the launched power, <nRec> is the number of recirculations, <trialNum> is the trial number and <string> indicates the type of signal, which can be one of the following:
    <beforeCPE>: signal before fine tuned carrier-phase estimation (after 8x8/4x4 MIMO equalizer);
    <afterCPE>: signal after a fine tuned (optimized window) maximum likelihood carrier-phase estimation (decision-directed);
    <afterCPE-DA>: signal after a data-aided carrier-phase estimation that maximizes the circularity of the 16QAM points (ideal phase estimation). 
    
Besides these received signals, the dataset also comprises the reference transmitted signal for each number of subcarriers, following the naming convention:

Stx_<nSC>SCs.mat

Finally, inside the sub-directory "results", a .mat file with BER results (measured after QAM demapping and comparison with the transmitted signal) for each data file is provided, following the naming convention:

<nSC>SCs_<Ptx>dBm_<nRec>recs_trial<trialNum>_<stringCPE>

where <stringCPE> can be one of the following:
    <CPE-DA>: corresponding to the results obtained with a data-aided CPE (ideal phase estimation)
    <CPE-DD>: corresponding to the results obtained with a decision-directed CPE with optimized window size
  

 
Edit 2019/03/01:

new data corresponding to the 8 SCs scenario has been added, considering different number of V&V CPE taps (201, 501, 751 and 1001).