Non-line of sight visible light communications: A technical and application based survey

Merdan, Fayzatul Ashmera Binti; Thiagarajah, Siva Priya; Dambul, Katrina D.

doi:10.1016/j.ijleo.2022.168982

Cited by 16 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there are several challenges that exist in MIMO VLC, and the scientific community is actively researching to find perfect solutions. Rising co-channel interference (CCI) noise brought on by many LEDs at the transmitters and receivers, respectively, is one of the difficulties in adopting MIMO systems [ 19 ]. Crosstalk between the LED transmitters is the reason for CCI occurrence.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Survey on MIMO Visible Light Communication: Current Research, Machine Learning and Future Trends

Sejan

Rahman

Aziz

et al. 2023

Sensors

View full text Add to dashboard Cite

Visible light communication (VLC) has contributed new unused spectrum in addition to the traditional radio frequency communication and can play a significant role in wireless communication. The adaptation of VLC technology enhances wireless connectivity both in indoor and outdoor environments. Multiple-input multiple-output (MIMO) communication has been an efficient technique for increasing wireless communications system capacity and performance. With the advantages of MIMO techniques, VLC can achieve an additional degree of freedom. In this paper, we systematically perform a survey of the existing work based on MIMO VLC. We categorize the types of different MIMO techniques, and a brief description is given. Different problem-solving approaches are given in the subsequent sections. In addition, machine learning approaches are also discussed in sufficient detail. Finally, we identify the future study direction for MIMO-based communication in VLC.

show abstract

Section: Introductionmentioning

confidence: 99%

A Comprehensive Survey on MIMO Visible Light Communication: Current Research, Machine Learning and Future Trends

Sejan

Rahman

Aziz

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…This system competes with fifth-generation (5G) radio frequency (RF) systems [ 2 , 9 ]. In OWC, the data carrier is light waves in the electromagnetic (EM) spectrum; hence, thanks to its broad bandwidth (300 GHz to 30 PHz), high data rate, high security, low cost, and high energy efficiency, it is a promising technology in wireless communications [ 2 , 6 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

A Monte-Carlo/FDTD Study of High-Efficiency Optical Antennas for LED-Based Visible Light Communication

et al. 2022

View full text Add to dashboard Cite

In high-speed wireless communication, visible light communication is considered an emerging and cutting-edge technology. A light-emitting diode can serve both as an illumination source in an environment and as a data transmitter. Nevertheless, plenty of complications stand in the way of developing VLC technology, including the low response time of waveguides and detectors and the field of view dependence of such devices. To cover those challenges, one approach is to develop a superior optical antenna that does not have a low response time related to phosphorescence materials and should also support concentrating light from the surroundings with a wide field of view. This research paper presents an optimized cylindrical optical antenna with benefits, such as affordable cost, fast response time due to high-efficient nanomaterials, and a wide field of view (FOV). The proposed structure avoids the need for intricate tracking systems and active pointing to the source, but it can also be integrated into portable devices. For the analysis of nanomaterials’ characteristics, finite difference time domain simulations are used, and Monte-Carlo raytracing is used to study the proposed optical antenna. It was found that the antenna’s optical efficiency varies from 1 to 29% depending on the size and the number of nanomaterials inside. Compared to other works, this paper shows higher efficiencies and wider FOV.

show abstract

Mixed‐Integer Motion Planning for Nonholonomic Robots Under Visible Light Communication Constraints

Caregnato‐Neto,

Maximo,

Afonso

2024

Optim Control Appl Methods

View full text Add to dashboard Cite

This work is concerned with the problem of motion planning for a group of nonholonomic robots under Visible Light Communication (VLC) connectivity requirements. Recently, multi‐robot systems operating with VLC networks have been demonstrated as an attractive solution for inspection tasks in pipelines and underground facilities. However, there are still no established methodologies to automate their operation. We address this problem with an optimization framework based on Mixed‐Integer Linear Programming (MILP) to design a motion planner that safely coordinates the robot team while jointly addressing the nonlinearity of the robots' dynamics, the directed line‐of‐sight requirement for VLC connections, and the connectivity maintenance of the ensuing directed networks. We propose a novel method to encode the nonlinear dynamics of nonholonomic robots into the MILP formulation and demonstrate through comparative trials that, although the resulting optimization search space is more restricted, the approach still outperforms mixed‐integer nonlinear programming in terms of optimization time and solution quality. The efficacy of the proposal is also demonstrated through realistic simulations of the Turtlebot3 robot platform.

show abstract

Non-line of sight visible light communications: A technical and application based survey

Cited by 16 publications

References 52 publications

A Comprehensive Survey on MIMO Visible Light Communication: Current Research, Machine Learning and Future Trends

A Comprehensive Survey on MIMO Visible Light Communication: Current Research, Machine Learning and Future Trends

A Monte-Carlo/FDTD Study of High-Efficiency Optical Antennas for LED-Based Visible Light Communication

Mixed‐Integer Motion Planning for Nonholonomic Robots Under Visible Light Communication Constraints

Contact Info

Product

Resources

About