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Challenges and Future Trends in Optical Communications
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Challenges and Future Trends in Optical Communications

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Optical Sensors".

Deadline for manuscript submissions: 20 April 2025 | Viewed by 3669

Special Issue Editor

Dr. Alain Richard Ndjiongue

E-Mail Website
Guest Editor
School of Science and Environment, Grenfell Campus, Memorial University of Newfoundland, 20 University Drive, Corner Brook, NL A2H 5G4, Canada
Interests: beyond 5G and 6G enabling technologies; optical wireless communications; hybrid optical wireless and radio frequency communications; reconfigurable intelligent surfaces and smart environments; physical layer security in wireless networks; visible light communications; power line communications

Special Issue Information

Dear Colleagues,

With the deployment of fifth-generation mobile systems and preparations ongoing for the sixth generation, optical communications technology is presented as a key concept. Such advances provide unprecedented communication capacity and cost-effective interconnections to support high-bandwidth applications.  

This Special Issue, entitled “Challenges and Future Trends in Optical Communications”, explores this exciting field. It presents original and unpublished papers on all aspects of optical communication and networking. It focuses on optical systems research, development, and applications. Authors are invited to submit manuscripts for the Special Issue, including, but not limited to, the following topics (keywords).

Manuscripts must be submitted through the Sensors website; authors will need to register and proceed to the author center. Please then follow the links for the Special Issue on Challenges and Future Trends in Optical Communications.

Dr. Alain Richard Ndjiongue
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • optical network protocols and architectures
  • physical layer security in optical networks
  • next-generation optical transport systems
  • performance analysis of optical communications and networks
  • optical devices and system architectures
  • optical networking for data center applications
  • digital signal processing for optical communications and systems
  • optical flexible networks and systems
  • cost-effective and green optical communications, networks, and systems
  • hybrid RF–optical systems and networks
  • testbeds for optical systems and network
  • free space optical communications systems
  • visible light communications
  • RIS-assisted optical systems
  • RIS-assisted hybrid RF-optical wireless communication systems and networks

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Published Papers (3 papers)

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Research

27 pages, 5309 KiB  
Article
A Case Study on the Integration of Powerline Communications and Visible Light Communications from a Power Electronics Perspective
by Felipe Loose, Juan Ramón Garcia-Meré, Adrion Andrei Rosanelli, Carlos Henrique Barriquello, José Antonio Fernandez Alvárez, Juan Rodríguez and Diego González Lamar
Sensors 2024, 24(20), 6627; https://doi.org/10.3390/s24206627 - 14 Oct 2024
Viewed by 686
Abstract
This paper presents a dual-purpose LED driver system that functions as both a lighting source and a Visible Light Communication (VLC) transmitter integrated with a Powerline Communication (PLC) network under the PRIME G3 standard. The system decodes PLC messages from the powerline grid [...] Read more.
This paper presents a dual-purpose LED driver system that functions as both a lighting source and a Visible Light Communication (VLC) transmitter integrated with a Powerline Communication (PLC) network under the PRIME G3 standard. The system decodes PLC messages from the powerline grid and transmits the information via LED light to an optical receiver under a binary phase shift keying (BPSK) modulation. The load design targets a light flux of 800 lumens, suitable for LED light bulb applications up to 10 watts, ensuring practicality and energy efficiency. The Universal Asynchronous Receiver-Transmitter (UART) module enables communication between the PLC and VLC systems, allowing for an LED driver with dynamic control and real-time operation. Key signal processing stages are commented and developed, including a hybrid buck converter with modulation capabilities and a nonlinear optical receiver to regenerate the BPSK reference signal for VLC. Results show a successful prototype working under a laboratory environment. Experimental validation shows successful transmission of bit streams from the PLC grid to the VLC setup. A design guideline is presented in order to dictate the design of the electronic devices involved in the experiment. Finally, this research highlights the feasibility of integrating PLC and VLC technologies, offering an efficient and cost-effective solution for data transmission over existing infrastructure. Full article
(This article belongs to the Special Issue Challenges and Future Trends in Optical Communications)
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14 pages, 3833 KiB  
Article
Real-Time Indoor Visible Light Positioning (VLP) Using Long Short Term Memory Neural Network (LSTM-NN) with Principal Component Analysis (PCA)
by Yueh-Han Shu, Yun-Han Chang, Yuan-Zeng Lin and Chi-Wai Chow
Sensors 2024, 24(16), 5424; https://doi.org/10.3390/s24165424 - 22 Aug 2024
Cited by 1 | Viewed by 754
Abstract
New applications such as augmented reality/virtual reality (AR/VR), Internet-of-Things (IOT), autonomous mobile robot (AMR) services, etc., require high reliability and high accuracy real-time positioning and tracking of persons and devices in indoor areas. Among the different visible-light-positioning (VLP) schemes, such as proximity, time-of-arrival [...] Read more.
New applications such as augmented reality/virtual reality (AR/VR), Internet-of-Things (IOT), autonomous mobile robot (AMR) services, etc., require high reliability and high accuracy real-time positioning and tracking of persons and devices in indoor areas. Among the different visible-light-positioning (VLP) schemes, such as proximity, time-of-arrival (TOA), time-difference-of-arrival (TDOA), angle-of-arrival (AOA), and received-signal-strength (RSS), the RSS scheme is relatively easy to implement. Among these VLP methods, the RSS method is simple and efficient. As the received optical power has an inverse relationship with the distance between the LED transmitter (Tx) and the photodiode (PD) receiver (Rx), position information can be estimated by studying the received optical power from different Txs. In this work, we propose and experimentally demonstrate a real-time VLP system utilizing long short-term memory neural network (LSTM-NN) with principal component analysis (PCA) to mitigate high positioning error, particularly at the positioning unit cell boundaries. Experimental results show that in a positioning unit cell of 100 × 100 × 250 cm3, the average positioning error is 5.912 cm when using LSTM-NN only. By utilizing the PCA, we can observe that the positioning accuracy can be significantly enhanced to 1.806 cm, particularly at the unit cell boundaries and cell corners, showing a positioning error reduction of 69.45%. In the cumulative distribution function (CDF) measurements, when using only the LSTM-NN model, the positioning error of 95% of the experimental data is >15 cm; while using the LSTM-NN with PCA model, the error is reduced to <5 cm. In addition, we also experimentally demonstrate that the proposed real-time VLP system can also be used to predict the direction and the trajectory of the moving Rx. Full article
(This article belongs to the Special Issue Challenges and Future Trends in Optical Communications)
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14 pages, 4452 KiB  
Article
A New Internet of Things Hybrid VLC/RF System for m-Health in an Underground Mining Industry
by Daniel Iturralde, Javier Guaña-Moya, Pablo Palacios Játiva, Iván Sánchez, Muhammad Ijaz, Ali Dehghan Firoozabadi and David Zabala-Blanco
Sensors 2024, 24(1), 31; https://doi.org/10.3390/s24010031 - 20 Dec 2023
Cited by 2 | Viewed by 1406
Abstract
This paper proposes a new system based on the Industrial Internet of Things (IIoT) for the monitoring of Mobile Health (m-Health) of workers in the underground mining industry. The proposed architecture uses a hybrid model in data transmission. Visible Light Communication (VLC) is [...] Read more.
This paper proposes a new system based on the Industrial Internet of Things (IIoT) for the monitoring of Mobile Health (m-Health) of workers in the underground mining industry. The proposed architecture uses a hybrid model in data transmission. Visible Light Communication (VLC) is used for downlink because of its narrow coverage, which aids in worker positioning. Radio frequency (RF) communication technology is used to send data for primary vital signs in the uplink, which is more efficient in transmission and is a viable solution according to the problem raised. The results obtained in terms of coverage and transmission for the downlink and uplink links show the feasibility of implementing the proposed system. Full article
(This article belongs to the Special Issue Challenges and Future Trends in Optical Communications)
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