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Free-space optical communications system pointer
SPIE Proceedings, 2003Free Space Optical (FSO) communications pointing problems will be described and a solution presented. Conventional systems used in sea, land, and space are illustrated. Our integrated approach investigates three major problems areas: kinematics, structure, and dexterity. Their interrelationship will be discussed.
Mark E. Rosheim, Gerald F. Sauter
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A novel free-space optic communication
SPIE Proceedings, 2005In this paper, we introduce a novel method for free-space optic communication. Normally, the free-space optic communication is sensitive to atmospheric turbulence. In order to overcome the weakness, we utilize two differential modulation optical beams, which improve markedly the quality of free-space optic communication.
Cheng Wang +4 more
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Coherent Optical Free-Space Communications
Optical Amplifiers and Their Applications/Coherent Optical Technologies and Applications, 2006The performance of coherent FSO systems operating within atmospheric are limited by turbulence. The performance statistics are computed from models for the induce index fluctuations, the second order Rytov perturbation method of solution to the stochastic wave equation and an extended form of the Huygens-Fresnel.
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Dual wavelength free space optical communications
(CLEO). Conference on Lasers and Electro-Optics, 2005., 2005We present a technique to correct for atmospheric scintillation noise in free space optical communications. Common mode rejection is used to remove co-channel noise, where each channel is transmitted on separate, but closely spaced, wavelengths.
K.J. Grant +5 more
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Securing Free Space Optics Communications through Optical Chaos
Advanced Photonics, 2011A free space optical chaotic communication system for the secure transmission of a digital message at hundreds Mb/s is presented. The performance of the system is investigated including the indoor infrared channel impairments.
SANTAGIUSTINA, MARCO +2 more
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MIMO Free-Space Optical Communication
2016In this chapter, we study multiple-input multiple-output (MIMO) free-space optical (FSO) communication systems degraded by atmospheric turbulence, absorption, scattering, diffraction, and misalignment. The employment of multiple transmit/receive apertures are studied as a means to enhance the reliability of FSO links by combating atmospheric turbulence
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Free-Space Optical Communications - Standardisation Issues
2018 International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications (CoBCom), 2018In the meantime, Optical Wireless is a well-established Communication Technology. In this talk, Free Space Optics (FSO) is considered within the focus of regulations and standardisation-bodies for future applications. The FSO-Technology is compared to other Communication Technologies (including wireless technologies, like WLAN and satellite ...
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Coding for free space optical communications
LEOS 2008 - 21st Annual Meeting of the IEEE Lasers and Electro-Optics Society, 2008Free-space optical (FSO) systems that are robust in the presence of atmospheric turbulence are discussed in this invited paper: (i) coded-OFDM, (ii) coded MIMO concept, and (iii) raptor code based FSO systems.
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Free-Space Optical Communication Channel Modeling
2015Free-space optical (FSO) systems have proved as the best technologies for communication and surveillance systems. These systems are merged with other technologies for providing robust applications. In FSO systems, when laser light is transmitted through the atmospheric channel, severe absorption is observed especially because of fog, snow, heavy rain ...
G. Eswara Rao +3 more
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