Results 21 to 30 of about 21,556 (239)
Ergodic Capacity Analysis of Satellite Communication Systems With SAG-FSO/SH-FSO/RF Transmission
IEEE Photonics Journal, 2022 Future non-terrestrial networks aim to achieve a throughput of Terabits/s. Therefore, free-space optical (FSO) communications have been adopted as a candidate solution due to their ability to achieve an extremely high data rate.
Ramy Samy +3 more
doaj +1 more source
International Journal of Technology, 2015 Beam wander and spatial noise that are modulated on optical propagation produce noise modulation in the signal spectral before being received by a Photodetector (PD). In order to suppress noise modulation in the signal spectral, we present an Optical
Ucuk Darusalam +2 more
doaj +1 more source
Laser anemometer measurements of trailing vortices in water [PDF]
, 1974 A series of measurements of trailing vortices behind lifting hydrofoils is described. These measurements were made in the Caltech Free-Surface Water Tunnel, using a laser-Doppler velocimeter to measure two components of velocity in the vortex wake.
Baker, G. R. +3 more
core +1 more source
Toward Global Quantum Communication: Beam Wandering Preserves Nonclassicality [PDF]
Physical Review Letters, 2012 Tap-proof long-distance quantum communication requires a deep understanding of the strong losses in transmission channels. Here we provide a rigorous treatment of the effects of beam wandering, one of the leading disturbances in atmospheric channels, on the quantum properties of light. From first principles we derive the probability distribution of the
Vasylyev, D. Yu. +2 more
openaire +3 more sources
Full-Duplex DF Relaying With Parallel Hybrid FSO/RF Transmissions
IEEE Open Journal of the Communications Society, 2021 The ever-increasing demands for higher data rates in telecommunications networks, along with the significant benefits offered by wireless communications, have pushed the technological developments to new frontiers. Free-space optical (FSO) communications
Michalis P. Ninos +3 more
doaj +1 more source
Design, Testing and Performance Evaluation of Beam Positioning System for Free Space Optical Communication System [PDF]
Radioengineering, 2021 Beam wandering and the wavefront distortion are the significant sources for the power loss in Wireless Optical Communication (WOC). In this paper Full Factorial Design (FFD) and Back Propagation Neural Network (BPNN) controller based autonomous beam ...
T. Pasupathi, J. Arputha Vijaya Selvi
doaj
MIPS: The Multiband Imaging Photometer for SIRTF [PDF]
, 1986 The Multiband Imaging Photometer for SIRTF (MIPS) is to be designed to reach as closely as possible the fundamental sensitivity and angular resolution limits for SIRTF over the 3 to 700μm spectral region.
Arens, J. +14 more
core +2 more sources
Effects of Anisotropic Turbulent Ocean on Propagation of Asymmetric Bessel-Gaussian Beam
IEEE Photonics JournalAiming at the propagation of asymmetric vortex beam, we investigate the spreading and wander characteristics of asymmetric Bessel-Gaussian beam in oceanic turbulence. Based on the cross-spectral density and Wigner distribution function of beam field, the
Lin Yu +3 more
doaj +1 more source
Propagation of Optical Coherence Vortex Lattices in Turbulent Atmosphere
Applied Sciences, 2018 Propagation properties in the turbulence atmosphere of the optical coherence vortex lattices (OCVLs) are explored by the recently developed convolution approach. The evolution of spectral density distribution, the normalized M 2 -factor, and the
Yan Huang +7 more
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PhotonicsDouble-ring perfect vortex beams (DR–PVBs) have attracted increasing attention due to their unique characteristics of carrying independent information channels and exhibiting higher security and stability during propagation.
Xiang Xu +3 more
doaj +1 more source