Results 141 to 150 of about 8,556,450 (194)

Unified Finite Series Approximation of FSO Performance Over Strong Turbulence Combined With Various Pointing Error Conditions

IEEE Transactions on Communications, 2020
In this paper, we investigate both the bit error rate (BER) and outage performance of free-space optical (FSO) links over strong turbulence combined with various pointing error conditions.
Kug-Jin Jung, Sung Sik Nam, Mohamed-Slim Alouini   +2 more
exaly   +2 more sources

Optimal Positioning of Hovering UAV Relays for Mitigation of Pointing Error in Free-Space Optical Communications

IEEE Transactions on Communications, 2022
The relay positions or hop distances in a multi-hop relaying scheme is an important parameter that can be optimized in order to mitigate the angle-of-arrival variance or pointing error in a free-space optical (FSO) backhaul link.
M. Bashir, Mohamed-Slim Alouini
semanticscholar   +1 more source

Secrecy Performance of FSO Using HD and IM/DD Detection Technique Over F-Distribution Turbulence Channel With Pointing Error

IEEE Wireless Communications Letters, 2021
This work is concerned with the secrecy performance of a free-space optical (FSO) communication system over Fisher-Snedecor $\mathcal {F}$ -distribution turbulence fading channel.
Liqiang Han, Yawei Wang, Xuemei Liu, Boyu Li   +3 more
semanticscholar   +1 more source

Analysis and compensation of the reflector antenna pointing error under wind disturbance

Research in Astronomy and Astrophysics, 2021
A large reflector antenna has been widely used in satellite communications, gravitational wave detection, galaxy origin observation and other fields due to its narrow beam and high gain.
Qian Xu, J. Zhang, Zhaodi Wang, Huan-Zhi Pan   +3 more
semanticscholar   +1 more source

Recognition of OAM state using CNN based deep learning for OAM shift keying FSO system with pointing error and limited receiving aperture

Conference on Lasers and Electro-Optics, 2021
In this paper, we study the performance of OAM shift keying FSO system with pointing error and limited receiving aperture using CNN based demodulator. The results show that the recognition accuracy can reach 98% with pointing error and weak turbulence.
Biao Gong, Shanyong Cai, Ziyang Xiao, Xin Wang, L. Li, Zhiguo Zhang   +5 more
semanticscholar   +1 more source

Pointing Error Budget Development and Methodology on the Psyche Project

IEEE Aerospace Conference, 2021
The Psyche mission was selected by NASA as the 14th mission in the Discovery Program in 2017. The Psyche spacecraft utilizes solar electric propulsion, and will journey to the asteroid (16) Psyche during a 3.5 year trajectory after its planned 2022 ...
Ashley Madni, Nicholas Bradley, D. Cervantes, D. Eldred, D. Oh, D. Mathews, Peter C. Lai   +6 more
semanticscholar   +1 more source

Performance enhancement of M-ary pulse-position modulation for a wavelength division multiplexing free-space optical systems impaired by interchannel crosstalk, pointing error, and ASE noise

, 2020
The performance evaluations and enhancements of wavelength-division-multiplexing (WDM) for the free-space optical (FSO) communication systems using a digital pulse-position modulation (DPPM), M-ary pulse-position modulation (M-ary PPM), and on–offkeying (
Ebrahim E. Elsayed, B. Yousif
semanticscholar   +1 more source

Ergodic Capacity Analysis for FSO Communications with UAV-Equipped IRS in the Presence of Pointing Error

International Conference on Speech Technology and Human-Computer Dialogue, 2020
This paper proposes an intelligent reflecting surface (IRS) carried by an Unmanned Aerial Vehicle (UAV) for laser path controllable free-space optical (FSO) communication system.
Haocheng Jia, J. Zhong, M. Janardhanan, Gaojie Chen   +3 more
semanticscholar   +1 more source

Performance of Opportunistic Beam Selection for OWC System Under Foggy Channel with Pointing Error

IEEE Communications Letters, 2020
Performance of optical wireless communication (OWC) in outdoor environments can be significantly degraded due to the fog and pointing errors. In this letter, we consider a multi-aperture detector which employs a low complexity opportunistic beam ...
Ziyaur Rahman, S. M. Zafaruddin, V. K. Chaubey   +2 more
semanticscholar   +1 more source