Results 21 to 30 of about 8,556,450 (194)

Reduction of the Beam Pointing Error for Improved Free-Space Optical Communication Link Performance [PDF]

IFAC Journal of Systems and Control, 2021
Free-space optical communication is emerging as a low-power, low-cost, and high data rate alternative to radio-frequency communication in short-to medium-range applications.
I. N’Doye, W. Cai, A. Alalwan, X. Sun, W. G. Headary, Mohamed-Slim Alouini, B. Ooi, T. Laleg‐Kirati   +7 more
semanticscholar   +1 more source

MGF Methods for Fixed and Gain Saturated Optically Preamplified FSO Links Impaired by Misalignments and Atmospheric Turbulence

Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2022
The Gaussian approximation is commonly used to evaluate the performance of free space optical communication systems. However, other performance evaluation methods such as the saddle point approximation, Chernoff bound and the modified Chernoff bound have
Jeremiah Oluwatosin Bandele
doaj   +1 more source

Dual-Hop Optical Communication Systems Over Málaga Turbulence Under Pointing Error Impairments With Decode-and-Forward Protocol

IEEE Photonics Journal, 2022
As a promising technology, free-space optical (FSO) communication plays an important role in the next generation of wireless communication. A dual-hop FSO communication system with decode-and-forward (DF) protocol is proposed in this paper, considering ...
Xiaozong Yu, Guanjun Xu, Qinyu Zhang, Zhaohui Song   +3 more
semanticscholar   +1 more source

Performance Evaluation of LDPC-Coded power series based Málaga (Ḿ) distributed MIMO/FSO link with M-QAM and Pointing Error

IEEE Access, 2022
In this work, the performance evaluation of Low-Density-Parity-Check (LDPC) based Multiple Input Multiple Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) based Free Space Optical (FSO) link with Málaga (Ḿ) channel model is analyzed.
D. Anandkumar, R. S. Sangeetha
semanticscholar   +1 more source

Researching pointing error effect on laser linewidth tolerance in space coherent optical communication systems.

Optics Express, 2022
In order to evaluate the pointing error effect on laser linewidth tolerance in a space coherent optical communication system, we derive a closed-form bit error rate (BER) model for binary phase-shift-keying (BPSK) modulation and heterodyne detection ...
Mi Li, You Guo, Xue Wang, Wanwang Fu, Yuexing Zhang, Yisi Wang   +5 more
semanticscholar   +1 more source

Inverse Solution Error Analysis and Correction of Beam Steering System Based on Risley Prisms

Applied Sciences, 2022
The pointing accuracy of the Risley prisms beam-steering system mainly depends on the accuracy of the solution method and the impact of the error on the solution.
Yinuo Song, Shijie Gao, Jiabin Wu, Shuaifei Wang, Li Huo   +4 more
doaj   +1 more source

Time-Efficient Simulation of Free-Space Optical Communication Systems Under Atmospheric Turbulence, Pointing Error, and Angle-of-Arrival Fluctuations

IEEE Photonics Journal, 2023
Computer simulation is a powerful and convenient tool for the design and performance evaluation of free-space optical (FSO) communication systems. In this article, we present two simulation frameworks that incorporate not only the effects of atmospheric ...
Mat T. Nguyen, Vuong Mai, Hoon Kim
doaj   +1 more source

Power Efficiency Analysis of Spatial Diversity Based Vertical FSO Links With Pointing Error in Multiple Beam Transmissions

IEEE Access, 2022
In this paper, we analyzed the diversity performance with increased pointing error caused by multiple beam transmissions for spatial diversity based vertical free space optical (FSO) back-haul links.
Sungjin Kim, Sang-Koo Han
semanticscholar   +1 more source

Satellite vibration effects on communication quality of OISN system

Open Engineering, 2022
Over space optical communications are considered as the critical technology for high-bandwidth, high-speed, and large-capacity communications. Indeed, the laser wavelength’s narrow beam divergence requires a precise beam pointing at both ends of the ...
Madhag Aqeel, Dhaam Haidar Zaeer
doaj   +1 more source

Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET [PDF]

Atmospheric Measurement Techniques, 2013
Sensitivity studies indicate that among the diverse error sources of ground-based sky radiometer observations, the pointing error plays an important role in the correct retrieval of aerosol properties.
B. Torres, C. Toledano, A. Berjón, D. Fuertes, V. Molina, R. Gonzalez, M. Canini, V. E. Cachorro, P. Goloub, T. Podvin, L. Blarel, O. Dubovik, Y. Bennouna, A. M. de Frutos   +13 more
doaj   +1 more source