OAM Mode Selection and Space-Time Coding for Atmospheric Turbulence Mitigation in FSO Communication

Orbital angular momentum (OAM) multiplexing has recently received considerable interest in free space optical (FSO) communications. Propagating OAM modes through free space may be subject to atmospheric turbulence (AT) distortions that cause intermodal crosstalk and power disparities between OAM mod...

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Veröffentlicht in:IEEE access Jg. 7; S. 88049 - 88057
Hauptverfasser: Amhoud, El Mehdi, Trichili, Abderrahmen, Ooi, Boon S., Alouini, Mohamed-Slim
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Piscataway IEEE 2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Angular momentum
Atmospheric turbulence
Coding
Communications systems
Crosstalk
Encoding
Free-space optical communication
Intermodal
MIMO (control systems)
MIMO communication
Modal choice
mode selection
Multiplexing
Optical transmitters
Orbital angular momentum (OAM)
Orbits
Orthogonal Frequency Division Multiplexing
Propagation modes
Space vehicles
space-time coding
ISSN:2169-3536, 2169-3536
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Zusammenfassung:Orbital angular momentum (OAM) multiplexing has recently received considerable interest in free space optical (FSO) communications. Propagating OAM modes through free space may be subject to atmospheric turbulence (AT) distortions that cause intermodal crosstalk and power disparities between OAM modes. In this paper, we are interested in multiple-input-multiple-output (MIMO) coherent FSO communication systems using the OAM. We propose a selection criterion for the OAM modes to minimize the impact of the AT. To further improve the obtained performance, we propose a space-time (ST) coding scheme at the transmitter. Through numerical simulations of the error probability, we show that the penalty from AT is completely absorbed for the weak AT regime, and considerable coding gains are obtained in the strong AT regime.
Bibliographie:ObjectType-Article-1
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ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2925680