Results 81 to 90 of about 7,278,007 (215)

Lambertian source modelling of free space optical ground-to-train communications [PDF]

, 2012
There is a increasing demand for high speed data services while travelling on trains and other means of public transportation. Hence, an alternative technology to radio frequency (RF) communications called free space optics (FSO) could be used to provide
Ghassemlooy, Zabih, H. Le Minh, Paudel, Rupak, R. Paudel, Z. Ghassemlooy, E. Leitgeb, Leitgeb, Erich, Rajbhandari, Sujan, S. Rajbhandari, Le Minh, Hoa   +9 more
core   +1 more source

Enhancing Medical Image Security Leveraging Quantum Key Distribution

IET Quantum Communication, Volume 7, Issue 1, January/December 2026.
This paper proposes QKD assisted quantum encryption for medical images. BB84 protocol is utilised to generate a secure shared key, which is further enhanced using Henon maps. The logistic map whose parameters are derived from the shared key is employed to generate the permutation sequence for pixel values.
Sudip Shrestha, Dilip Rai, Nanda Bikram Adhikari   +2 more
wiley   +1 more source

Subcarrier intensity modulated free-space optical communication systems [PDF]

This thesis investigates and analyses the performance of terrestrial free-space optical communication (FSO) system based on the phase shift keying pre-modulated subcarrier intensity modulation (SIM).
Popoola, Wasiu Oyewole
core  

Bit error rate measurement of free space optical communication links under laboratory controlled conditions [PDF]

, 2011
This paper outlines the experimental investigation of the fog effect on the bit error rate (BER) performance of the free space optical (FSO) communication link under a controlled laboratory environment.
Ghassemlooy, Zabih, Gholami, Asghar, Rajbhandari, Sujan, Ijaz, Muhammad, Le Minh, Hoa, Perez Soler, Joaquin   +5 more
core  

MODELO PARA UNA RED HIBRIDA ÓPTICA INALÁMBRICA

Redes de Ingeniería, 2012
Este artículo propone un modelo de red hibrida óptica - inalámbrica mediante la tecnología free space optics (FSO) para el desarrollo de una red de acceso de nueva generación, que represente una solución a los proveedores para diferenciación de servicios,
Luis Alejandro Quiroz, Néstor Moreno, Nelson Enrique Vera   +2 more
doaj  

Conception and development of an adaptive optics testbed for free-space optical communication [PDF]

, 2009
Optical free space communications are an efficient approach to transmit high data-rates with small antennas and low power consumption over large distances. Possible scenarios are links between satellites, up- and down-links from and to ground stations as
Moll, Florian
core  

Roadmap to Free Space Optics

, 2020
With the ever-increasing demand for data and radio frequency spectrum becoming congested, Free Space Optical (FSO) communication may find a niche for situations where fiber is too expensive or too difficult to install.
Ooi, Boon S., Alouini, Mohamed-Slim, Cox, Mitchell, Trichili, Abderrahmen   +3 more
core   +1 more source

Investigation of turbulence effect on the free space optical link for ground-to-train communications [PDF]

, 2011
There is a growing demand for high mobility and ultrafast internet/data services which drives the motivation for free space optical (FSO) communications for high speed trains.
Ghassemlooy, Zabih, Paudel, Rupak, Livingstone, Bryan, Rajbhandari, Sujan, Le Minh, Hoa   +4 more
core  

Contrasting space-time schemes for MIMO FSO systems with non-coherent modulation [PDF]

, 2012
International ...
Ghassemlooy, Zabih, Guowei Yang, Virieux, Thomas, Bourennane, Salah, Salah Bourennane, Yang, Guowei, Khalighi, Mohammad-Ali, Thomas Virieux, Zabih Ghassemlooy, Mohammad-Ali Khalighi   +9 more
core   +1 more source

Free-Space Optical Communication Systems with a Partially Coherent Gaussian Beam and Media Diversity [PDF]

Terrestrial free-space optical (FSO) communications is an emerging low-license-free and high-bandwidth access solution, albeit hampered by the combined effects from atmospheric loss, turbulence and pointing errors (PEs).
Lee, It Ee
core