Article
Engineering, Electrical & Electronic
Tilahun Zerihun Gutema, Harald Haas, Wasiu O. Popoola
Summary: This work investigates probabilistic shaping (PS) for optical wireless communications and its application to wavelength division multiplexing (WDM) based visible light communication (VLC). The performance of the proposed scheme is validated through experimental demonstration. The experimental setup employs lenses to collimate the light beam and optimizes system parameters of the WDM based VLC system, measures channel response, and allocates PS-based symbols to individual orthogonal frequency division multiplexing (OFDM) subcarriers. Under the considered channel conditions, PS achieves a near Shannon capacity transmission rate of 10.81 Gb/s, which is 25% higher than the widely used adaptive bit-power loading algorithm under the same channel conditions.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Lucas Teixeira, Felipe Loose, Carlos Henrique Barriquello, Vitalio Alfonso Reguera, Marco Antonio Dalla Costa, J. Marcos Alonso
Summary: This article discusses the feasibility of using LED lights for visible light communication and its impact. The study found that in low data rate applications, the efficiency of the switching mode converters used as modulators is higher, while in high data rate applications, linear mode modulators are more energy efficient.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Antonio Costanzo, Valeria Loscri, Mauro Biagi
Summary: VLC, as a novel communication paradigm, faces challenges such as external interference affecting system reliability. This article proposes a system driven by link conditions to select modulation schemes and evaluates the feasibility and effectiveness of a bi-directional system to adapt to environmental changes.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Computer Science, Hardware & Architecture
Shimaa Naser, Lina Bariah, Sami Muhaidat, Paschalis C. Sofotasios, Mahmoud Al-Qutayri, Ernesto Damiani, Merouane Debbah
Summary: This article introduces the overview and challenges of visible light communication (VLC) technology, as well as the advantages and limitations of centralized machine learning (ML) techniques. To overcome the privacy and communication overhead issues of centralized ML, the federated learning (FL) paradigm is introduced. The article also provides a review of the application of FL in VLC networks and discusses potential future research directions.
IEEE WIRELESS COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Sylvester Aboagye, Alain R. Ndjiongue, Telex M. N. Ngatched, Octavia A. Dobre, H. Vincent Poor
Summary: The recent development of 5G cellular networks has led to their deployment worldwide, but the skip-zone problem caused by signal obstructions is a challenge that needs to be addressed. By using relays or reconfigurable intelligent surfaces (RISs) to mitigate the effects of obstacles, smooth and efficient operation of 5G networks can be ensured. This paper provides a comprehensive tutorial on indoor visible light communication (VLC) systems utilizing RIS technology, discussing the basics of VLC and RISs, and exploring key challenges and research problems in integrating optical RISs with emerging technologies.
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
(2023)
Article
Telecommunications
Sylvester Aboagye, Telex M. N. Ngatched, Octavia A. Dobre, Alain R. Ndjiongue
Summary: This letter explores the use of intelligent reflecting surfaces (IRSs) in an indoor visible light communication (VLC) system to address the line-of-sight (LoS) blockage issue. A system model and optimization algorithm are proposed to establish robust non-LoS links while considering practical user behaviors and optimizing the orientation of the IRS mirror array. Simulation results verify the effectiveness of the proposed design and algorithm in overcoming the LoS blockage issue.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Computer Science, Information Systems
Mohammad Furqan Ali, Dushantha Nalin K. Jayakody, Yonghui Li
Summary: Underwater visible light communication (UVLC) has emerged as a potential wireless carrier for signal transmission in oceanic environments. It offers high capacity data-rate and bandwidth with minimal delay, but faces challenges in long range deployment due to signal attenuation and turbulent channel conditions. This study provides a comprehensive survey of UVLC implementations and summarizes various techniques and applications related to optical signal propagation.
Article
Computer Science, Information Systems
Sihua Shao, Adrian Salustri, Abdallah Khreishah, Chenren Xu, Shuai Ma
Summary: Retroreflective visible light communication and positioning (R-VLCP) is a low-power IoT technology that utilizes indoor light infrastructures. It offers self-alignment, low SWaP, glaring-free, and sniff-proof features. R-VLCP employs an optical modulator and retroreflector to manipulate the intensity of reflected light for communication and positioning. The channel model is generalized to arbitrary PD and CCR sizes, and an open-source ray tracing simulator is developed for validation. Increasing PD size and CCR density improves performance with diminishing returns.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Computer Science, Information Systems
Shuqiang Niu, Ping Wang, Sihui Chi, Zhongyu Liu, Weina Pang, Lixin Guo
Summary: An enhanced OFDM/OQAM scheme for visible light communication, inspired by the PHO-OFDM scheme, is proposed in this letter. Half of the subcarriers carry useful data while the rest carry negative clipping noise, improving power efficiency. Simulation results show better BER performance compared to PHO-OFDM without additional interference operations.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Sang Hyun Lee, Minsu Zhang, Jae Kyun Kwon
Summary: This paper evaluates the best error performance of dimmable visible light communication systems using binary modulations, emphasizing the importance of error probabilities under different configurations. It provides a practical guideline for enhanced VLC system design based on the ultimate decoding error performance targeted for dimmable VLC systems.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Wangzhaoqi Xie, Bao Li, Yuyang Peng, Han Zhu, Fawaz AL-Hazemi, Mohammad Meraj Mirza
Summary: This paper studies the security optimization scheme of the SSK-VLC system based on the space shift keying (SSK) technology. The antenna selection (AS) technology and artificial noise (AN) cancellation method are adopted to enhance the confidentiality of the SSK-VLC system.
Article
Optics
Xin Liu, Zixian Wei, Mutong Li, Lei Wang, Zhongxu Liu, Changyuan Yu, Lai Wang, Yi Luo, H. Y. Fu
Summary: The study established a high-speed visible light communication system using three different wavelength mini-LEDs and a neural network receiver. The data rates of 16.6 Gbps were achieved, which is the highest reported for mini/micro-LED based VLC systems.
Article
Engineering, Electrical & Electronic
Shuai Ma, Ruixin Yang, Xiong Deng, Xintong Ling, Xun Zhang, Fuhui Zhou, Shiyin Li, Derrick Wing Kwan Ng
Summary: This paper investigates the spectral efficiency (SE) and energy efficiency (EE) of asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) for visible light communication (VLC). Optimal power allocation schemes are proposed to maximize SE and tackle the non-convex EE maximization problems. The performance of the proposed schemes is validated through numerical analysis.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Amr M. Abdelhady, Osama Amin, Ahmed K. Sultan Salem, Mohamed-Slim Alouini, Basem Shihada
Summary: This paper studies the temporal characteristics of the intelligent reflecting surface (IRS)-based visible light communication (VLC) channel, taking into account the dimensions and relative positions of the source, reflector, and detector, and analyzes the impact of various system parameters.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Thanh V. Pham, Anh T. Pham
Summary: This article focuses on the designs of physical layer security (PLS) in visible light communication systems, specifically looking at how to use artificial noise-aided precoding to address the presence of multiple unauthorized users. Different design approaches are proposed considering unknown and known unauthorized users' channel state information (CSI), and two sub-optimal yet low-complexity methods, Concave-Convex Procedure (CCP) and Semidefinite Relaxation (SDR), are examined to solve the non-convex design problem. Extensive numerical results are presented to demonstrate the feasibility and performance of each design with practical parameters.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
