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  4. Data-Aided Multi-Format DSP for Robust Free-Space Coherent Optical Communication
 
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2024
Conference Paper
Title

Data-Aided Multi-Format DSP for Robust Free-Space Coherent Optical Communication

Abstract
The increasing demand for fast and license-free satellite feeder links has put optical free-space communications on the research agenda. To compensate for atmospheric turbulence utilizing spatial diversity and post-DSP combining, a DSP is needed that works reliably even at very low SNRs. For this purpose, a custom multi-format data-aided equalizer is developed and its performance is analyzed under various conditions in a dual-polarization coherent transmission system. Numerical simulations and a field test over a 3.2-km free-space optical link are used to validate the DSP design, and show stable DSP performance for a 32 GBd coherent transmission at SNR-values down to 0 dB, even for DP-16QAM modulation.
Author(s)
Johst, Abraham
Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut HHI  
Molle, Lutz
Hochschule für Technik und Wirtschaft Berlin
Perlot, Nicolas  
Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut HHI  
Rothe, Marcel
Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut HHI  
Rohde, Michael
Berliner Hochschule für Technik
Nölle, Markus
Hochschule für Technik und Wirtschaft Berlin
Mainwork
IEEE International Conference on Wireless for Space and Extreme Environments, WiSEE 2024  
Conference
International Conference on Wireless for Space and Extreme Environments 2024  
DOI
10.1109/WiSEE61249.2024.10850117
Language
English
Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut HHI  
Keyword(s)
  • coherent optical communication

  • data-Aided DSP

  • free-space optics

  • satellite feeder links

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