800G Coherent FSO Demonstration: Datasets and Post-Processing Routines

This repository includes a set of experimental data and post-processing routines for the study of ultra-high capacity free-space optics (FSO) systems enabled coherent optical fiber transceivers operating at bit rates of 800 Gbps and above. The repository is organized into the following subfolders:<br> i) <strong>800G experiment</strong>: includes the system performance data (NGMI, SNR, etc) obtained from a 92 Gbaud coherent optical transmission over an outdoor 42 m FSO link under varying weather conditions during 48 hours;<br> ii) <strong>atmospheric turbulence</strong>: includes the raw measured received optical power and post-processing routines to analyze the impact of atmospheric turbulence during a 1-hour period at a sample rate of 10 kHz; <br> iii) <strong>channel estimation</strong>: includes the implementation of an adaptive channel estimator driven by the least mean squares (LMS) or recursive least squares (RLS) algorithms, enabling a highly accurate prediction of the channel state in an outdoor FSO link;<br> iv) <strong>optical beam alignment</strong>: includes the post-processing routines that exploit the sensitivity of an FSO system towards pointing errors using direct air-to-fiber coupling.