Characterization of multi-level digital waveforms for low-Earth-orbit free space optical communication

Mike S. Ferraro; Rita Mahon; William S. Rabinovich; Andrew G. Coffee; James L. Murphy; James L. Dexter; Wade T. Freeman

doi:10.1117/12.2585889

5 March 2021 Characterization of multi-level digital waveforms for low-Earth-orbit free space optical communication

Mike S. Ferraro, Rita Mahon, William S. Rabinovich, Andrew G. Coffee, James L. Murphy, James L. Dexter, Wade T. Freeman

Proceedings Volume 11678, Free-Space Laser Communications XXXIII; 1167814 (2021) https://doi.org/10.1117/12.2585889
Event: SPIE LASE, 2021, Online Only

Abstract

As satellite constellations continue to expand and capacity demands grow, free-space optical (FSO) communication offers a complementary alternative to RF systems for low-Earth-orbit satellite communication networks. FSO systems can support higher link bandwidths and provide high data security without RF spectral constraints. The performance of FSO-LEO links, however, can be significantly impacted by receive power variation caused by propagation and scattering losses along with losses due to atmospheric turbulence. Here, we investigate intensity modulated, direct detection (IM/DD) digital waveforms that can be adapted to dynamically changing link conditions to optimize bandwidth utilization. Using a laboratory scintillation playback system, the performance of BPSK, QPSK, and 8PSK waveforms will be presented and compared to theoretical modelling. The impact of adaptive equalization will be characterized and initial performance of a multi-channel IM/DD architecture will be presented.

Conference Presentation

Citation Download Citation

Mike S. Ferraro, Rita Mahon, William S. Rabinovich, Andrew G. Coffee, James L. Murphy, James L. Dexter, and Wade T. Freeman "Characterization of multi-level digital waveforms for low-Earth-orbit free space optical communication", Proc. SPIE 11678, Free-Space Laser Communications XXXIII, 1167814 (5 March 2021); https://doi.org/10.1117/12.2585889

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