Results 161 to 170 of about 31,839 (188)

Wavelength agile FSO receiver

2013 Integrated Communications, Navigation and Surveillance Conference (ICNS), 2013
The design of a free-space optical (FSO) transceiver suitable for the demands of establishing reliable communication between mobile nodes such as UAVs requires the solution of difficult problems related to pointing, acquisition and tracking. To accommodate the inevitably larger misalignment conditions encountered in mobile applications, the receiver ...
Wei Yi, Peter G. LoPresti, Asaad Kaadan, Hazem H. Refai   +3 more
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Axicons in FSO systems

2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 2007
This paper studies the possibility of using axicons in free space optics (FSO) systems. The behavior of the pseudo- Bessel beams generated by "logarithmic" and "linear" axicons, with or without stops, was analyzed through the Huygens-Fresnel integral of diffraction in cylindrical coordinates.
Leonardo A. Ambrosio, Michel Zamboni-Rached, Carlos H. S. Santos, Hugo E. Hernandez-Figueroa   +3 more
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Hybrid FSO/RF-FSO Systems over Generalized Málaga Distributed Channels with Pointing Errors

2019 27th European Signal Processing Conference (EUSIPCO), 2019
The combined effect of Malaga distributed atmospheric turbulence and pointing errors on the performance of a hybrid free-space optical (FSO)/ radio-frequency (RF)-FSO communication system is presented and analyzed in this paper. We considered three performance metrics, namely, outage probability, average bit error rate (BER) and average capacity.
Banibrata Bag, Akinchan Das, Chayanika Bose, Aniruddha Chandra   +3 more
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Multi-user FSO communication link

2017 Cognitive Communications for Aerospace Applications Workshop (CCAA), 2017
Free Space Optical (FSO) communication technology has a data rate higher than other wireless communication techniques. Although FSO has enjoyed widespread notoriety for its point-to-point communication, the increasing demand of mobile platforms and multi-user communications requires considerable improvement over current FSO systems.
Federica Aveta, Hazem H. Refai, Peter LoPresti   +2 more
openaire   +1 more source

Estimation of terrestrial FSO availability

Free-Space Laser Communication and Atmospheric Propagation XXX, 2018
The availability of free space optics (FSO) links remains an important question in wide-scale deployment of the technology. As with microwave links, for any given terminal design there will be a correlation between the range between nodes and the link availability. This correlation will change depending on location and season. The key variables are the
William S. Rabinovich, Lindsay Willstatter, Michael Vilcheck, Linda M. Thomas, Christopher I. Moore, James L. Murphy, Mike S. Ferraro, Rita Mahon   +7 more
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Optimization of FSO quantum backscatter communication

Applied Optics, 2019
In this paper, the free-space optics (FSO) quantum backscatter communication (QBC), inspired by the quantum illumination concept, is described. In this method, the transmitter generates entangled photon pairs. The signal photon is transmitted in the direction of the modulated retro reflector (MRR) or the tag antenna, and the idler photon is moved to ...
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OFDM-FSO Communication System Analysis

2021
In this paper, we have presented the performance analysis of a QAM-orthogonal frequency-division multiplexing (OFDM)-free space optics (FSO) (QAM-OFDM-FSO) transmission system, based on optical double sideband (ODSB), optical single sideband (OSSB), and optical vestigial sideband transmission scheme. Simulation models have been developed for optimizing
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Hybrid FSO/RF test link

2012 IV International Congress on Ultra Modern Telecommunications and Control Systems, 2012
The paper deals with the design of a test link for the characterization of a hybrid Free Space Optical/Radio-Frequency (FSO/RF) atmospheric channel. The ever-increasing demand on broadband connectivity, specifically in the Last-Mile networks, leads to the use of Free-Space optical systems in combination with RF systems above 100 GHz, which are able to ...
Zdenek Kolka, Zdenek Kincl, Viera Biolkova, Dalibor Biolek   +3 more
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Ethernet bridge for FSO links

2009 19th International Conference Radioelektronika, 2009
The paper deals with a bridge for atmospheric Free-Space Optical links. The atmospheric turbulence causes fades whose duration is typically in the order of tens of milliseconds, which results in the loss of hundreds or thousands of packets. The loss is misinterpreted by the TCP protocol as network congestion and leads to throttling the sender ...
Michal Kubicek, Zdenik Kolka
openaire   +1 more source

FSO in Satellite Communication

This project focuses on understanding the different factors involved in establishing communication between ground station and satellite. With the help of m-QAM and different simulation channels analyze the way channel affects the transmitted signal and data.
Mugelan, RK, Jadhav, Varad, Paul, Basil
openaire   +1 more source