Results 71 to 80 of about 17,683 (311)

Performance analysis of optical differential spatial modulation over atmospheric joint effect

Tongxin xuebao, 2023
Traditional optical spatial modulation techniques all rely on the premise that the system receiving end can obtain accurate channel state information.The optical differential spatial modulation (ODSM) system effectively avoids complex channel estimation,
Hui ZHAO, Jin LI, Weiwen MA, Wenchao DENG, Tianqi ZHANG, Yuanni LIU   +5 more
doaj   +2 more sources

Cₙ² Modeling for Free-Space Optical Communications: A Review

IEEE Access
Atmospheric 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
doaj   +1 more source

BER and outage probability of DPSK subcarrier intensity modulated free space optics in fully developed speckle. [PDF]

, 2009
In this paper a differential phase shift keying (DPSK) subcarrier intensity modulated (SIM) free space optical (FSO) link is considered in negative exponential atmospheric turbulence environment.
Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, Popoola, Wasiu O., Leitgeb, Erich, Ghassemlooy , Zabih   +4 more
core   +1 more source

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

OPTICAL TURBULENCE : CHAOS IN OPTICAL BISTABILITY

Le Journal de Physique Colloques, 1983
The transmitted light from a bistable optical cavity can exhibit a variety of bifurcation phenomena, passing from a stationary state, through successive periodic and chaotic states to a final fully developed chaotic state, as the intensity of incident laser light is increased.
openaire   +2 more sources

Multi‐scale Optimization on Interfacial Evaporative Cooling for Photovoltaic Performance Enhancement

Advanced Science, EarlyView.
This study presents a passive siphon‐driven interfacial evaporative cooling technology for photovoltaics. A multiscale multiphysics model is developed and validated experimentally. Results show that optimizing installation parameters reduces operating temperature by up to 22.3 °C and boosts power efficiency by 8.9%, offering a practical pathway for ...
Fuxiang Li, Haosheng Lin, Zengguang Sui, Yunren Sui, Zhixiong Ding, Wei Wu   +5 more
wiley   +1 more source

On the Relative Effect of Underwater Optical Turbulence in Different Channel Conditions

IEEE Access
This paper presents a simulation framework for modelling optical underwater turbulence in conjunction with absorption and scattering. Using this technique, the channel is evaluated in two ways: the turbulent statistics in different channel conditions ...
Callum T. Geldard, John S. Thompson, Wasiu O. Popoola   +2 more
doaj   +1 more source

Characterization of Localized Atmospheric Turbulence Layer Using Laser Light Backscattered off Moving Target

Applied Sciences, 2020
A concept of atmospheric turbulence characterization using laser light backscattered off a moving unresolved target or a moving target with a glint is considered and analyzed through wave-optics numerical simulations.
Victor A. Kulikov, Svetlana L. Lachinova, Mikhail A. Vorontsov, Venkata S. Rao Gudimetla   +3 more
doaj   +1 more source

Numerical simulations of beam propagation through optical turbulence for high-altitude platform crosslinks

, 2004
In this paper we introduce a simulation method for modelling clear-air atmospheric turbulence effects for long horizontal stratospheric paths. Divergence angles of several hundred microradians in combination with link distances up to 800 km require to ...
Perlot, Nicolas, Jüngling, Ralf, Giggenbach, Dirk, Horwath, Joachim   +3 more
core  

Experimental investigation of the performance of different modulation techniques under controlled FSO turbulence channel

, 2010
This paper experimentally investigates and compares the performance of the free space optics system employing three different modulation schemes, on-off keying (OOK) with nonreturn- to-zero (NRZ) and return-to-zero (RZ) and the binary phase shift keying (
Z. Ghassemlooy, Adebanjo, Olusegun, O. Adebanjo, S. Ansari, S. Rajbhandari, Ghassemlooy, Zabih, H. Le Minh, Ansari, S., A. Gholami, Rajbhandari, Sujan, Ijaz, Muhammad, M. Ijaz, Le Minh, Hoa   +12 more
core   +1 more source