Auflistung Nach Schlagwort "Optics"
Anzeige der Dokumente 1-11 von 11
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Connectivity Issues for Ultraviolet UV-C Networks
(2011)This paper focuses on the connectivity issues of a non-line-of-sight (NLOS) optical wireless network operating in the ultraviolet UV-C spectral region. NLOS UV-C transmitters have a limited effective coverage and, hence, ... -
Deposition of refractory coatings by LCVD
(1995)TiC layers have been successfully deposited locally on tool steel specimens and real small industrial tools in order to improve their mechanical and corrosion properties. TiC films have been produced by the pyrolytic laser ... -
A feasibility study of dynamic stress analysis inside a running internal combustion engine using synchrotron X-ray beams
(2013)The present investigation establishes the feasibility of using synchrotron-generated X-ray beams for time-resolved in situ imaging and diffraction of the interior components of an internal combustion engine during its ... -
Inverse Gaussian Modeling of Turbulence-Induced Fading in Free-Space Optical Systems
(2011)We propose the inverse Gaussian distribution, as a less complex alternative to the classical log-normal model, to describe turbulence-induced fading in free-space optical (FSO) systems operating in weak turbulence conditions ... -
Node Isolation Probability for Serial Ultraviolet UV-C Multi-hop Networks
(2011)Non-line-of-sight optical wireless transmission, operated in the unlicensed ultraviolet UV-C band, has been recently suggested as an alternative means of communication. However, due to limited coverage, relayed UV-C networks ... -
Optical Wireless Communications With Heterodyne Detection Over Turbulence Channels With Pointing Errors
(2009)We study the error performance of an heterodyne differential phase-shift keying (DPSK) optical wireless (OW) communication system operating under various intensity fluctuations conditions. Specifically, it is assumed that ... -
Performance Analysis of a Laser Ground-Station-to-Satellite Link With Modulated Gamma-Distributed Irradiance Fluctuations
(2010)The performance of a ground-station-to-space laser uplink with a Gaussian-beam wave model subject to turbulence and beam wander effects is the topic of the present study. The modulated gamma distribution is used to describe ... -
Performance of a laser Earth-to-satellite link over turbulence and beam wander using the modulated gamma-gamma irradiance distribution
(2011)We present an analytical framework for the performance evaluation of laser satellite uplinks over the major probabilistic impairments, i.e., atmospheric turbulence and beam wander. Specifically, we consider a ground-stat ... -
QAM and PSK OFDM RoFSO Over M-Turbulence Induced Fading Channels
(2015)Free-Space Optical (FSO) technology can effectively transfer multiple radio-frequency signals, and this new technique is commonly referred in the technical literature as radio on FSO (RoFSO). In the present study, we ... -
Using a HAP Network to Transfer WiMAX OFDM Signals: Outage Probability Analysis
(2013)Transferring wireless broadband services across extremely far distances on Earth is usually implemented nowadays either by ground-based or satellite communications. Terrestrial networks require, however, heavy installation ... -
Weather Effects on FSO Network Connectivity
(2012)The use of relays is one of the most promising methods for mitigating impairments of the performance of free-space optical (FSO) systems and extending their limited transmission range. However, several factors contribute ...