This README.txt file was generated on 2023-12-19 by Asun Pérez Pascual

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GENERAL INFORMATION
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Dataset Title: OVS-SCM Modulation (raw data)

Author’s Name: Mª Asunción Pérez Pascual

Address: C/ Paranimf 1, Universitat Politècnica de València Gandia

E-mail: asperez@eln.upv.es 
 
Data Creation Date: December 2019 

Funding Sources: Ministry of Economy and Competitiveness Ref:TEC2015-70858-C2-2-R

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SHARING/ACCESS INFORMATION
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License: OVS-SCM Modulation © 2020 by Asun Pérez Pascual is licensed under CC BY 4.0 

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DATASET DESCRIPTION
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Keywords: Optical communication, SCM, FPGA


Information about the files:

- Medidas_BER_EVM.xls: contains BER and EVM measurements made for different types of modulations for both the HC-SCM modulator and the OVS-SCM, varying the following parameters: 
oversampling factor, transmitter filter span, rolloff factor, receiver filter span, receiver equalizer order, pre-emphasis filter (in transmission)
- Medidas_Potencia.xls: contains BER and EVM values varying the received power for HC-SCM and OVS-SCM modulations; for all QAM modulations under study

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METHODOLOGICAL INFORMATION
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The data was collected from the experiment detailed in section II.A (figure 3) of the article.
This experiment uses a fiber optic communication system, with a 20km fiber, connected to two FPGAs that perform the functions of transmitter and receiver respectively.
Both FPGAs are controlled by a Matlab script which controls the type of modulation used as well as the different parameters that have been modified.


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DATA-SPECIFIC INFORMATION 
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List of variables and full names:
- Modulation Type: QAM modulation type
- Oversampling: oversampling factor, the value 2 indicates HC-SCM modulation; the value 16/7 indicates OVS-SCM modulation
- SpanTX: transmission filter span
- SpanRX: Reception filter span
- Rolloff: rolloff factor
- OrderEQ: order of the receiver equalizer filter
- RetEQ: delay of the receiver equalizer filter
- Preemph: 6dB digital pre-emphasis filter in the transmitter
- BER: Bit error rate
- EVM: Error vector magnitude
- Throughput: transmission frequency
- POT OPT der(dBm): optical power measured at the splitter (1.6% of the transmitted) in dBm
- POT OPT Rx (mW):optical power measured at the transmitter(in mW) 
- POT OPT Rx(dBm):optical power measured at the receiver (in dBm)
- DAC: the phase used in the DAC is indicated
- Att1: electrical attenuation before the RF transmission amplifier
- Att2: electrical attenuation after the RF transmission amplifier
- Att3: electrical attenuation in reception

 Units of measure: 
- EVM: %
- Throughput: Gb/s 
- Power: mW
- Power: dBm