This book explores power allocation in visible light communication systems using Non- Orthogonal Multiple Access (NOMA) and integrating emerging technologies such as Intelligent Reflecting Surfaces and Integrated Sensing and Communication (ISAC). It provides detailed analysis, simulations, and practical insights to advance the field of next- generation wireless communication.  The authors describe techniques with benefits that include minimized latency, improved security, high channel capacity and data rates, accuracy, increased bandwidth, and cost-effective components. Coverage includes simulation results from both indoor and outdoor ecosystems using NOMA communication. The authors also discuss user pairing/joint user pairing, signal power domain control, power allocation, superimposed coding (SC) and successive interference cancellation (SIC) phenomenon, which improve user performance and interference management with full-time frequency resource utilization. The book also addresses intelligent reflection surfaces (IRS) technology and ISAC, as viable integrations for next-generation broadband communication networks.

• Provides detailed information about the Visible Light-Non-Orthogonal Multiple Access (VL-NOMA) communication network
• Includes a performance analysis of various power allocation techniques for VL-NOMA communication systems
• Describes VL-NOMA with intelligent reflecting surface technology for integrated sensing and communication systems
• VL-NOMA-enabled integrated sensing and communication systems have been introduced for various emerging use cases

Chidi Emmanuel Ngene completed his Master MEng (Distinction) and PhD from the University of Johannesburg, South Africa in 2020 and 2024, respectively. Currently, he is serving as a postdoctoral research fellow at the Department of Electrical and Electronic Engineering, University of Johannesburg, South Africa. He has published a number of quality research papers in SCI-indexed Journals and continues to explore the vast area of Telecommunication Engineering focusing on visible light communication, wireless network, non-orthogonal multiple access (NOMA), integrated sensing and communication (ISAC), semiconductors components. Recently he is working towards applications of visible light-non orthogonal multiple access for Smart systems, intelligent reflecting surfaces (IRS), deep reinforcement learning (DRL), 5G/6G networks, wireless communication in VL-NOMA systems, analysis of OptiSystem software simulations tool in optical communication systems and VL/LED integrated sensing and communication (ISAC).ORCID record https://orcid.org/0000-0003- 0308-6762.

Prabhat Thakur has received his Ph.D. in Electronics and Communication Engineering from Jaypee University of Information Technology, Solan India in 2018. He is currently working as an Associate Professor at the Alliance School of Applied Engineering, Alliance University, Bengaluru, India. He also serves as a Visiting Researcherin the Department of Electrical and Electronic Engineering Science, University of Johannesburg (since February 2022), where he previously worked as a Post-Doctoral Researcher (February 2019–December 2021). He has also held academic and research positions at Symbiosis International (Deemed University), Chandigarh University, and Jaypee University of Information Technology, where he contributed to an Indian Space Research Organisation-sponsored research project. His research interests include next-generation communication systems (5G/6G), Society 5.0, the Internet of Things, Signal Processing, and Cybersecurity. He has authored more than 100 research publications, including articles in reputed international journals, conference papers, book chapters, and a book published by Wiley. He is a recipient of the Young Researcher Award from the National Research Foundation (South Africa) and is a Senior Member of IEEE.

Ghanshyam Singh has received PhD degree in Electronics Engineering from the Indian Institute of Technology, Banaras Hindu University (IIT-BHU), Varanasi, India, in 2000. Currently, he is working as a Professor of Electronics and Communication Engineering and Director of the Centre for Smart Information and Communication Systems in the Department of Electrical and Electronic Engineering Science at the University of Johannesburg, South Africa.He was a visiting researcher at Seoul National University in Seoul, South Korea. He has served as a professor in the Department of Electronics and Communication Engineering at Jaypee University of Information Technology in Solan (Waknaghat), India. He has authored or co-authored over 450 scientific research papers in peer-reviewed journals and international conferences. He is a Senior Member of the IEEE.His research and teaching focus on spectrum technologies—spanning RF/microwave, millimeter/THz wave, free-space optics, and visible light—and their innovative applications. These applications encompass next-generation communication systems (5G/6G), sensing, sustainable smart cities, Industry 4.0/5.0, Healthcare 4.0/5.0, intelligent transport systems, energy management (IoE), and digital farming. Hepossesses over 26 years of experience in teaching and research within academia and R&D institutions.He has supervised numerous doctoral theses and master's dissertations. He has completed several sponsored research projects and has authored/co-authored multiple books and book chapters published by Springer, Elsevier, IET, Wiley, and CRC Press.