Results 21 to 30 of about 20,118 (299)
IEEE AccessAtmospheric turbulence influence on optical wave propagation, referred to as optical turbulence, has long been studied for astronomical applications and is now being addressed for free-space optical communication links between ground and satellites ...
Florian Quatresooz, Claude Oestges
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LDPC Decoding Techniques for Free-Space Optical Communications
IEEE Access, 2021 There has been significant interest in free-space optical (FSO) communication by the research community in recent years. This is due to its high data rate, unlicensed spectrum, low cost, and immense security for FSO systems.
Albashir Adel Youssef +2 more
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Drones, 2023 Free-space optical (FSO) communication promises to bring fibre-like speeds to data transmissions between ground, sky and space. This is becoming more important in light of the increasing volume of data collected by aircraft and spacecraft. The University
Skevos F. E. Karpathakis +7 more
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Deep learning for enhanced free-space optical communications
Machine Learning: Science and Technology, 2023 Atmospheric effects, such as turbulence and background thermal noise, inhibit the propagation of light used in ON–OFF keying (OOK) free-space optical (FSO) communication. Here we present and experimentally validate a convolutional neural network (CNN) to
M P Bart +10 more
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Relay-assisted free-space optical communication [PDF]
IEEE Transactions on Wireless Communications, 2007 In this paper, we present relay-assisted transmission as a powerful fading mitigation tool for free-space optical systems operating in atmospheric turbulence channels. We study both serial (i.e., multi-hop transmission) and parallel (i.e., cooperative diversity) relaying encoupled with amplify-and-forward and decode-and-forward modes.
Majid Safari, Murat Uysal
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Scientific Reports, 2021 Recently, new physics for unconditional security in a classical key distribution (USCKD) has been proposed and demonstrated in a frame of a double Mach–Zehnder interferometer (MZI) as a proof of principle, where the unconditional security is rooted in ...
Byoung S. Ham
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Point-to-point stabilized optical frequency transfer with active optics
Nature Communications, 2021 Atomic clocks and their networks are useful tools for optical communications and frequency metrology. Here the authors use phase stabilization and active tip-tilt to suppress atmospheric effects and enable optical frequency transfer through free-space.
Benjamin P. Dix-Matthews +10 more
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RESTORE: Low-Energy Drone-Assisted NLoS-FSO Emergency Communications
IEEE Access, 2022 Drones are becoming an alternative for the rapid but temporary deployment of data-communication infrastructure in disaster-struck areas. A drone may be equipped with communications equipment to provide network connectivity for stranded users and first ...
Paa Kwesi Esubonteng +1 more
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Free-Space Optical MISO Communications With an Array of Detectors
IEEE Open Journal of the Communications Society, 2020 Multiple-input multiple-output (MIMO) and multiple-input single-output (MISO) schemes have yielded promising results in free space optical (FSO) communications by providing diversity against fading of the received signal intensity.
Muhammad Salman Bashir +1 more
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A Review of Semiconductor-Based Monolithic Optical Phased Array Architectures
IEEE Open Journal of the Solid-State Circuits Society, 2021 Semiconductor-based monolithic optical phased arrays (OPA) enable optical beam-steering for lidar and 3D imaging, free-space optical communications, projection and 3D holographical displays, and neural probes among many other possible applications.
Hossein Hashemi
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