Assessment of the Effectiveness of the Subsea Optical Wireless Communication System in the Arabian Sea Using Field Data

2019 ◽  
Vol 53 (1) ◽  
pp. 9-19
Author(s):  
Vittal Doss Prakash ◽  
Narayanaswamy Vedachalam ◽  
Raju Ramesh ◽  
Pokkali Udaya Prasanth ◽  
Sethuraman Ramesh ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Water Depth ◽  
Arabian Sea ◽  
Light Emitting Diode ◽  
Fold Increase ◽  
Data Rate ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Remotely Operated Vehicle ◽  
Water Depths

AbstractThe article presents the effectiveness of a subsea optical wireless communication (OWC) system comprising a light-emitting diode (LED) transmitter and a photodiode (PD) receiver when operated at various water depths in the Arabian Sea. An optical attenuation profile identified from solar hyperspectral irradiance measured in up to a 90-m water depth in the Arabian Sea using a remotely operated vehicle is used as inputs to the subsea OWC communication effectiveness assessment (CEA) model developed using MATLAB. It is identified that a 30-W LED-PD-based OWC system, with the noise equivalent power of 10−12 W/√Hz, could have a horizontal range and data rate of 146 m and 1 Mbps in water depths ≥220 m in the Arabian Sea. For the same data rate, the horizontal range reduces to 65 m at a 90-m water depth in the same location during the day. In coastal waters, the system could have a data rate of 10 kbps at a 30-m range. A six-fold increase in the transmitter electrical power could increase the horizontal range by a factor of 1.5. An experimental 30-W LED-PD-based OWC system developed and operated in a calibrated tank facility is found to have a data rate and range of 3.2 Mbps and 3 m, respectively. The performance of the prototype complies with the ideal CEA model with an accuracy of 84% under similar inherent channel property and apparent system parameters.

scholarly journals 345 m underwater optical wireless communication with 270 Gbps data rate based on a green laser diode with NRZ-OOK modulation

2017 ◽  
Vol 25 (22) ◽  
pp. 27937 ◽  
Author(s):  
Xiaoyan Liu ◽  
Suyu Yi ◽  
Xiaolin Zhou ◽  
Zhilai Fang ◽  
Zhi-Jun Qiu ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Laser Diode ◽  
Green Laser ◽  
Data Rate ◽  
Optical Wireless Communication ◽  
Optical Wireless

scholarly journals Analisis Performansi Multi User Detection pada Kanal NLOS untuk Sistem NOMA-VLC

2021 ◽  
Vol 9 (2) ◽  
pp. 482
Author(s):  
BIMA SURYA PRATAMA ◽  
NACHWAN MUFTI ADRIANSYAH ◽  
BRIAN PAMUKTI
Keyword(s):  
Wireless Communication ◽  
Visible Light ◽  
Interference Cancellation ◽  
Multiple Access ◽  
Data Rate ◽  
Line Of Sight ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Better Than ◽  
Non Line Of Sight

ABSTRAKNon-orthogonal multiple access (NOMA), mulai diteliti untuk dapat digunakan sebagai teknik multiple access yang efektif pada jaringan 5G karena teknik ini dapat menghemat bandwidth modulasi. Pada penelitian ini, NOMA diterapkan untuk sistem downlink Visible Light Communivation (VLC). Kami telah melakukan analisis performansi Multi-User Detection (MUD) pada kanal propagasi Non-Line of Sight (NLOS) dengan mempertimbangkan efek reflektor dan efek bayangan (shadowing). Kami juga mempertimbangkan teknik MUD yang digunakan pada penelitian ini yaitu Succesive Interference Cancellation (SIC). Setelah simulasi yang ekstensif, kami menemukan bahwa dengan penerapan SIC sebagai MUD pada sistem NOMA-VLC lebih baik dibandingkan dengan tanpa NOMA. Selain itu, kami juga memperoleh peningkatan data rate sebesar 72 %.Kata kunci: VLC, NOMA, NLOS, MUD, Optical Wireless Communication. ABSTRACTNon-orthogonal multiple access (NOMA), began to be studied to be used as an effective multiple access technique on 5G networks because this technique can save modulation bandwidth. In this research, NOMA is applied to the Visible Light Communivation (VLC) downlink system. We have performed a Multi-User Detection (MUD) performance analysis on Non-Line of Sight (NLOS) propagation channels by considering the reflector and shadowing effects. We also consider the MUD technique used in this study, namely Successive Interference Cancellation (SIC). After extensive simulations, we found that the application of SIC as MUD to the NOMA-VLC system is better than without NOMA. In addition, we also achieve an increase in data rate of 72%.Keywords: VLC, NOMA, NLOS, MUD, Optical Wireless Communication.

scholarly journals Optimum resource allocation in optical wireless systems with energy-efficient fog and cloud architectures

2020 ◽  
Vol 378 (2169) ◽  
pp. 20190188 ◽  
Author(s):  
Osama Zwaid Alsulami ◽  
Amal A. Alahmadi ◽  
Sarah O. M. Saeed ◽  
Sanaa Hamid Mohamed ◽  
T. E. H. El-Gorashi ◽  
...  
Keyword(s):  
Resource Allocation ◽  
Wireless Communication ◽  
Multiple Access ◽  
Mobile Node ◽  
Data Rate ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
High Data ◽  
Multiple Users ◽  
Integrated Architecture

Optical wireless communication (OWC) is a promising technology that can provide high data rates while supporting multiple users. The optical wireless (OW) physical layer has been researched extensively, however, less work was devoted to multiple access and how the OW front end is connected to the network. In this paper, an OWC system which employs a wavelength division multiple access (WDMA) scheme is studied, for the purpose of supporting multiple users. In addition, a cloud/fog architecture is proposed for the first time for OWC to provide processing capabilities. The cloud/fog-integrated architecture uses visible indoor light to create high data rate connections with potential mobile nodes. These OW nodes are further clustered and used as fog mini servers to provide processing services through the OW channel for other users. Additional fog-processing units are located in the room, the building, the campus and at the metro level. Further processing capabilities are provided by remote cloud sites. Two mixed-integer linear programming (MILP) models were proposed to numerically study networking and processing in OW systems. The first MILP model was developed and used to optimize resource allocation in the indoor OWC systems, in particular, the allocation of access points (APs) and wavelengths to users, while the second MILP model was developed to optimize the placement of processing tasks in the different fog and cloud nodes available. The optimization of tasks placement in the cloud/fog-integrated architecture was analysed using the MILP models. Multiple scenarios were considered where the mobile node locations were varied in the room and the amount of processing and data rate requested by each OW node was varied. The results help to identify the optimum colour and AP to use for communication for a given mobile node location and OWC system configuration, the optimum location to place processing and the impact of the network architecture. This article is part of the theme issue ‘Optical wireless communication’.

scholarly journals Optical Wireless Communication: A Survey of Recent Advances, Applications and Challenges

2020 ◽  
Author(s):  
Nandhini Devi R ◽  
Leones Sherwin Vimalraj S ◽  
Lydia J
Keyword(s):  
Wireless Communication ◽  
Data Rate ◽  
High Data Rate ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Free Space Optical ◽  
High Data ◽  
Space Optical Communication ◽  
And Performance ◽  
Submerged Area

This paper proposes the Optical Wireless Communication (OWC) for different Application, Advances and Challenges as high data rate multimedia services are evolving continuously and exponentially increasing the demand for wireless capacity 5G generation and upgrading Technologies. These are used to bypass the RF transmission band, which is inadequate to meet the demand for future high data rate 5G services. It offers services for both indoor and outdoor application as well as in the submerged area with contact distances ranging from nm to more than 10,000 km. This paper provides an overview and performance analysis of technical communication involving Visible light, Line of sight underwater, free space, optical communication, optical camera communication and light detection for all surveys of keys understanding technologies (OWCs) and presents them as aspects of criteria such as spectrum use, application, design, classification advances and challenges.

scholarly journals Experimental Demonstration of High-Sensitivity Underwater Optical Wireless Communication Based on Photocounting Receiver

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 467
Author(s):  
Chao Li ◽  
Zichen Liu ◽  
Daomin Chen ◽  
Xiong Deng ◽  
Fulong Yan ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Direct Detection ◽  
Light Emitting Diode ◽  
Photon Counting ◽  
High Sensitivity ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
Receiver Sensitivity ◽  
Data Rates ◽  
Type C

In this paper, we propose a high-sensitivity long-reach underwater optical wireless communication (UOWC) system with an Mbps-scale data rate. Using a commercial blue light-emitting diode (LED) source, a photon counting receiver, and return-to-zero on–off keying modulation, a receiver sensitivity of −70 dBm at 7% FEC limit is successfully achieved for a 5 Mbps intensity modulation direct detection UOWC system over 10 m underwater channel. For 1 Mbps and 2 Mbps data rates, the receiver sensitivity is enhanced to −76 dBm and −74 dBm, respectively. We further investigate the system performance under different water conditions: first type of seawater (c = 0.056 m−1), second type (c = 0.151 m−1), and third type (c = 0.398 m−1). The maximum distance of the 2 Mbps signal can be extended up to 100 m in the first type of seawater.

Development of a ROF-based System Using DQPSK through IsOWC Channel for Long Haul Data Rate Applications

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Paramjot Singh ◽  
Himali Sarangal ◽  
Simrandeep Singh Thapar
Keyword(s):  
Wireless Communication ◽  
High Speed ◽  
Satellite Communication ◽  
Data Rate ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
High Data ◽  
Shift Keying ◽  
Promising Area ◽  
High Speed Data

Abstract In order to achieve large capacity inter-satellite communication, optical wireless communication (OWC) is emerging as a promising area of research amongst the academic and research groups. While radio over fiber (ROF) and advanced modulation technique is considered to be a key enabling technology in the development of OWC based access networks for high-speed data transmission. This paper has proposed a novel ROF based system model using OWC for long haul high data rate applications. This system is designed using differential quadrature phase shift keying (DQPSK) through inter-satellite optical wireless communication (IsOWC) channel. The verification of the performance is performed at bit rates of 100 and 200 Gbps over a space distance range up to 1000 to 50000 km under different transmitted power. The simulative investigation has been carried out in terms of important parameters like BER, Q-factor and eye diagrams.

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