Results 51 to 60 of about 4,014 (208)

Interference and noise analysis for hybrid FSO/RF-based 6G mobile backhaul

ETRI Journal, 2022
Optical wireless communication, or free space optics, is a promising solution for backhauls in sixth-generation mobile systems. However, the susceptibility of optical links to weather conditions has led to FSO links being furnished with radio frequency ...
Soyinka Nath, Shree Prakash Singh, Sujata Sengar   +2 more
doaj   +1 more source

Comparative Analysis of Free Space Optics and Single Mode Fiber [PDF]

, 2016
In this paper we have done comparative analysis of free space optics and single mode fibre optical channels system. Performance study is done for variable ranges 1km, 50km and 100km for the FSO and SMF channels.
Vijay, J. (Jayprakash), Vishwakarma, P. (Pinky)   +1 more
core  

Experimental characterization of a 400  Gbit/s orbital angular momentum multiplexed free-space optical link over 120 m [PDF]

, 2016
We experimentally demonstrate and characterize the performance of a 400-Gbit/s orbital angular momentum (OAM) multiplexed free-space optical link over 120- meters on the roof of a building.
Ahmed, Nisar, Ashrafi, Nima, Ashrafi, Solyman, Bock, Robert, Djordjevic, Ivan B., Huang, Hao, Lavery, Martin P.J., Li, Long, Liao, Peicheng, Neifeld, Mark A., Ren, Yongxiong, Tur, Moshe, Wang, Zhe, Willner, Alan E., Willner, Asher, Xie, Guodong, Yan, Yan, Zhao, Zhe   +17 more
core   +1 more source

Hybrid STA With FNN and CNN Models for Robust Channel Estimation in Turbulent FSO and Doppler‐Affected OFDM transmission for LEO Satellite Communication

IET Communications, Volume 20, Issue 1, January/December 2026.
A hybrid framework of deep learning‐based channel estimation for robust communication in free space optical (FSO)‐based low earth orbit (LEO) satellite system using advanced modulation formats for orthogonal frequency division multiplexing (OFDM) transmission. Simulations demonstrate that STA‐ SRCNN and STA‐DNCNN excel in terrestrial FSO channels (NMSE
Saad Rustum, Usman Habib, Salman Ahmed, Muhammad Ahmad, Muhammad Ijaz   +4 more
wiley   +1 more source

Impact of Thermal-Induced Turbulent Distribution Along FSO Link on Transmission of Photonically Generated mmW Signals in the Frequency Range 26–40 GHz

IEEE Photonics Journal, 2020
Microwave photonics is a promising solution to transmit millimeter wave (mmW) signals for the 5th generation (5G) mobile communications as part of a centralized radio access network (C-RAN).
Luis Vallejo, Matej Komanec, Beatriz Ortega, Jan Bohata, Dong-Nhat Nguyen, Stanislav Zvanovec, Vicenc Almenar   +6 more
doaj   +1 more source

Modeling of optical wave propagation through turbulent atmosphere using fractional approach for FSO wireless communication

Journal of Physics Communications, 2023
Free space optical (FSO) wireless communication has emerged as a viable alternative to the existing fiber optics and radio frequency (RF) communications due to its ability to operate in unlicensed spectrum, offering huge data handling capacities and ...
Abdullah Nafis Khan, Muhammad Zubair, Usman Younis   +2 more
doaj   +1 more source

Performance Analysis of the LDPC‐Coded Hybrid LQAM‐MPPM for UWOC Systems

IET Optoelectronics, Volume 20, Issue 1, January/December 2026.
The effectiveness of LDPC codes in improving the performance of hybrid modulations is discussed, with coded 128‐QAM‐(12, 2) MPPM offering ~6.5 and 5.8 dB code gains at a BER of in strong and moderate turbulence, respectively. These results demonstrate the promise of hybrid modulation with LDPC as a robust and efficient modulation scheme for UWOC ...
Hongyan Jiang, Wanyi Hu, Xin Liao, Ning He, Wasiu Popoola, Ahmad Fairuz Omar, Sujan Rajbhandari   +6 more
wiley   +1 more source

Comparison of Non Chirped Nrz, Chirped Nrz and Alternate-chirped Nrz Modulation Techniques for Free Space Optic (Fso) Systems [PDF]

, 2015
Free Space Optics (FSO) is the technology where transmission occurs through optical waveform that contains datatransformed at the transmitter from electrical signal.
Dr. Maisara Binti Othman, Rezki El Arif., Dr. Ir. Sholeh Hadi Pramono, M.S
core  

Delayed Frame Repetition for Free Space Optical communication (FSO) Channel

, 2017
Free space optical communication is gaining interest because of its various advantages like high data rate, high power efficiency, no license regulation etc. However, one has to overcome the challenge of distortion and fading caused by atmospheric turbulences and bad weather conditions. Free space optical communication channel is a time variant channel.
Shrestha, Amita, Giggenbach, Dirk, Hanik, Norbert   +2 more
openaire   +2 more sources

6G Wireless Communications Enabled by the Blockchain: Privacy and Middleware Architecture

International Journal of Distributed Sensor Networks, Volume 2026, Issue 1, 2026.
6G is transformational and brings revolutionary innovations in virtually all sectors, such as healthcare, autonomous systems, and manufacturing, through ultralow latency, massive connection, and far superior computing capabilities than any previous generation.
Moumita Chanda, Olive Mazumder, Tawfikur Rahman, Jannatul Ferdous, Saeed Olyaee   +4 more
wiley   +1 more source