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Topical Collection "Visible Light Communication (VLC)"

A topical collection in Sensors (ISSN 1424-8220). This collection belongs to the section "Communications".

Editor

Dr. Chen Chen
E-Mail
Collection Editor
School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
Interests: visible light communication; LiFi; Internet of Things; digital signal processing
Special Issues and Collections in MDPI journals

Topical Collection Information

Dear Colleagues,

Visible light communication has gained enormous popularity across numerous domains, including short- and long-range communications and positioning and intelligent transport systems, amongst others. In general, it has been positioned as an emerging access network technology that has become an ever-increasing topic of interest over the last two decades.

Several key research challenges have emerged within the VLC domain, including multitechnology network tenancy, high data rates, physical layer security, resource allocation, co-design of high-speed data rates and dimming capabilities, machine-to-machine, underwater links, system network topologies, front-end design, and novel material photoactive components. In terms of global development, standards have been developed that define the minimum operation of VLC networks (IEEE802.11bb, amongst others).

In comparison with conventional RF networks, VLC can offer several advantages, including significantly higher data rates exceeding 10 Gb/s, inherent security as light does not traverse walls and the LED beam can be dedicated to a highly defined area (attocells), license-free operation, and no interference with existing RF systems, which is valuable in airplane and hospital applications. Therefore, the field of VLC promises substantial opportunities for basic and applied research and development. The proposed Special Issue will provide an opportunity for a thorough assessment of the current state of VLC across numerous applications, helping to develop the state-of-the-art.

We welcome submissions on any topic in VLC, with particular interest in the following, nonexclusive, list of principal topics:

  • Multitechnology VLC/x integration and transceiver design;
  • High data rate links, channel modelling, and digital signal processing;
  • Conventional and non-orthogonal modulation, coding, and multiple access;
  • Optical camera communication;
  • Underwater VLC;
  • Intelligent transport systems;
  • Mobility and integration of VLC into wider heterogeneous networks;
  • Applications of neural networks and new architectures;
  • VLC in healthcare sensing applications;
  • Co-illumination/dimming and communication system design;
  • Software-defined VLC, resource allocation, and multiuser system design.


Dr. Chen Chen
Guest Editors

Manuscript Submission Information

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Published Papers (2 papers)

2021

Jump to: 2020

Article
On the Achievable Max-Min User Rates in Multi-Carrier Centralized NOMA-VLC Networks
Sensors 2021, 21(11), 3705; https://doi.org/10.3390/s21113705 - 26 May 2021
Viewed by 476
Abstract
Visible light communications (VLC) is gaining interest as one of the enablers of short-distance, high-data-rate applications, in future beyond 5G networks. Moreover, non-orthogonal multiple-access (NOMA)-enabled schemes have recently emerged as a promising multiple-access scheme for these networks that would allow realization of the [...] Read more.
Visible light communications (VLC) is gaining interest as one of the enablers of short-distance, high-data-rate applications, in future beyond 5G networks. Moreover, non-orthogonal multiple-access (NOMA)-enabled schemes have recently emerged as a promising multiple-access scheme for these networks that would allow realization of the target spectral efficiency and user fairness requirements. The integration of NOMA in the widely adopted orthogonal frequency-division multiplexing (OFDM)-based VLC networks would require an optimal resource allocation for the pair or the cluster of users sharing the same subcarrier(s). In this paper, the max-min rate of a multi-cell indoor centralized VLC network is maximized through optimizing user pairing, subcarrier allocation, and power allocation. The joint complex optimization problem is tackled using a low-complexity solution. At first, the user pairing is assumed to follow the divide-and-next-largest-difference user-pairing algorithm (D-NLUPA) that can ensure fairness among the different clusters. Then, subcarrier allocation and power allocation are solved iteratively through both the Simulated Annealing (SA) meta-heuristic algorithm and the bisection method. The obtained results quantify the achievable max-min user rates for the different relevant variants of NOMA-enabled schemes and shed new light on both the performance and design of multi-user multi-carrier NOMA-enabled centralized VLC networks. Full article
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Figure 1

2020

Jump to: 2021

Article
Multi-User Precoder Designs for RGB Visible Light Communication Systems
Sensors 2020, 20(23), 6836; https://doi.org/10.3390/s20236836 - 29 Nov 2020
Viewed by 630
Abstract
In this paper, we design linear precoders for the downlink of a visible light communication (VLC) system that simultaneously serves multiple users. Instead of using phosphor-coated white light-emitting diodes (PWLEDs), we focus on Red-Green-Blue light-emitting diodes (RGB-LEDs) that allow modulating three separate data [...] Read more.
In this paper, we design linear precoders for the downlink of a visible light communication (VLC) system that simultaneously serves multiple users. Instead of using phosphor-coated white light-emitting diodes (PWLEDs), we focus on Red-Green-Blue light-emitting diodes (RGB-LEDs) that allow modulating three separate data streams on the three primary colors of the RGB-LEDs. For this system, we design a zero-forcing (ZF) precoder that maximizes the weighted sum rate for a multilevel pulse amplitude modulation (M-PAM). The precoding design in RGB-based systems presents some challenges due to the system constraints, such as the limited power, the non-negative amplitude constraints per light-emitting diode (LED), and the need to guarantee white light emission while transmitting with RGB-LEDs. For comparison purposes, we also consider the ZF design for a PWLED-based system and evaluate the performance of both a PWLED- and an RGB-based system. Full article
Show Figures

Figure 1

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