Results 31 to 40 of about 2,144 (180)

Indoor Non-directed Optical Wireless Communications Optimization of the Lambertian Order [PDF]

Journal of Electrical and Computer Engineering Innovations, 2013
For an indoor non-directed line of sight optical wireless communication (NLOS-OWC) system we investigate the optimized Lambertian order (OLO) of light-emitting diodes (LEDs).
F. Ghassemlooy, D. Wu, M.A. Khalighi, X. Tang   +3 more
doaj   +1 more source

A survey on OFDM-based elastic core optical networking [PDF]

, 2013
Orthogonal frequency-division multiplexing (OFDM) is a modulation technology that has been widely adopted in many new and emerging broadband wireless and wireline communication systems.
De Leenheer, Marc, Morea, A, Mukherjee, B, Zhang, GY   +3 more
core   +2 more sources

Relay-Assisted Technology in Optical Wireless Communications: A Survey

IEEE Access, 2020
When the distance between the source and the target is long, the signal will be affected by atmospheric turbulence, weather conditions and obstacles, which cannot support the information transmission.
Wenwen Liu, Jupeng Ding, Jiong Zheng, Xifeng Chen, Chih-Lin I   +4 more
doaj   +1 more source

Rolling Shutter OFDM Scheme for Optical Camera Communication Considering Mobility Environment Based on Deep Learning

Applied Sciences, 2022
This paper presents a rolling shutter orthogonal frequency-division multiplexing (RS-OFDM) optical camera communication higher rate longer range proposed in IEEE 802.15.7a Task Group (TG7a) using an image sensor as a receiver.
Huy Nguyen, Van Linh Nguyen, Duc Hoang Tran, Yeong Min Jang   +3 more
doaj   +1 more source

Design and Analysis of 5G Optical Communication System for Various Filtering Operations using Wireless Optical Transmission

Results in Physics, 2019
In this paper, the Optical Wireless Communication (OWC) channels for different optical filters are analysed and compared with their previous model. Performance analysis is done using different optical filters namely Bessel, Trapezoidal, Gaussian and ...
K.H. Shakthi Murugan, M. Sumathi
doaj   +1 more source

Deep Learning Framework for Wireless Systems: Applications to Optical Wireless Communications

, 2018
Optical wireless communication (OWC) is a promising technology for future wireless communications owing to its potentials for cost-effective network deployment and high data rate.
Lee, Hoon, Lee, Inkyu, Lee, Sang Hyun, Quek, Tony Q. S.   +3 more
core   +1 more source

Spectrum-Efficient Triple-Layer Hybrid Optical OFDM for IM/DD-Based Optical Wireless Communications [PDF]

, 2020
In this paper, a triple-layer hybrid optical orthogonal frequency division multiplexing (THO-OFDM) for intensity modulation with direct detection (IM/DD) systems with a high spectral efficiency is proposed.
Ghassemlooy, Zabih, Ji, Han, Lin, Bangjiang, Qiao, Shuang, Tang, Xuan, Zhang, Tian   +5 more
core   +2 more sources

The Role of Optical Wireless Communication Technologies in 5G/6G and IoT Solutions: Prospects, Directions, and Challenges

Applied Sciences, 2019
The upcoming fifth- and sixth-generation (5G and 6G, respectively) communication systems are expected to deal with enormous advances compared to the existing fourth-generation communication system.
Mostafa Zaman Chowdhury, Md. Shahjalal, Moh. Khalid Hasan, Yeong Min Jang   +3 more
doaj   +1 more source

Theoretical Demonstration of Security Improvement of Optical Phased Array Based on Optically Injection-Locked Lasers

Photonics, 2021
The high security of optical phased array (OPA) signals is an important requirement for OPA-based optical wireless communication (OWC). We propose a method for improving the security of OPA-based OWC systems using optically injection-locked (OIL ...
Anh-Hang Nguyen, Jun-Hyung Cho, Hyuk-Kee Sung   +2 more
doaj   +1 more source

Deep Learning-Aided OFDM-Based Generalized Optical Quadrature Spatial Modulation

IEEE Photonics Journal, 2022
In this paper, we propose an orthogonal frequency division multiplexing (OFDM)-based generalized optical quadrature spatial modulation (GOQSM) technique for multiple-input multiple-output optical wireless communication (MIMO-OWC) systems. Considering the
Chen Chen, Lin Zeng, Xin Zhong, Shu Fu, Min Liu, Pengfei Du   +5 more
doaj   +1 more source