Article
Engineering, Electrical & Electronic
Nancy A. Arafa, Mohamed S. Arafa, Saied M. Abd El-atty, Fathi E. Abd El-Samie, Hossien B. Eldeeb
Summary: In this article, we investigate the Bit-Error Rate (BER), capacity, and fairness of the NOMA-based infrastructure-to-vehicle (I2V) Visible Light Communication (VLC) system. We consider realistic channel modeling and examine different I2V scenarios. By using NOMA and optimizing the power allocation coefficient, we achieve high fairness index and target BER.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yin-He Jian, Chih-Chun Wang, Chi-Wai Chow, Wahyu Hendra Gunawan, Tzu-Chieh Wei, Yang Liu, Chien-Hung Yeh
Summary: In this paper, we propose and demonstrate a steerable optical beam visible light communication (VLC) system combining orthogonal frequency division multiplexing (OFDM) and non-orthogonal multiple access (NOMA) schemes, and utilizing a spatial light modulator (SLM)-based reconfigurable intelligent surface (RIS) for beam steering.
IEEE PHOTONICS JOURNAL
(2023)
Article
Chemistry, Analytical
Wahyu Hendra Gunawan, Chi-Wai Chow, Yang Liu, Yun-Han Chang, Chien-Hung Yeh
Summary: This work presents a high-capacity visible light communication system that utilizes five dimensions in physics and achieves significant improvements in spectral efficiency and bandwidth utilization. The system is based on orthogonal frequency division multiplexing and non-orthogonal multiple access signals.
Article
Engineering, Electrical & Electronic
Yangping Qian, Chen Chen, Pengfei Du, Min Liu
Summary: Due to the problems of severe inter-beam interference and high costs in conventional full space division multiple access (SDMA)-based multi-user underwater visible light communication (MU-UVLC) systems, a hybrid SDMA and quasi-orthogonal multiple access (QOMA) scheme is proposed to enhance the performance of partial SDMA-based MU-UVLC systems. The scheme aims to reduce inter-beam interference and improve bit error rate (BER) performance by enabling closely located users to share a light beam and using a combination of SDMA and QOMA. Simulation and experimental results show significant improvement in BER performance and a wider range of effective power allocation ratio compared to conventional hybrid SDMA/NOMA schemes.
IEEE PHOTONICS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Fangyuan Xing, Shibo He, Victor C. M. Leung, Hongxi Yin
Summary: This paper investigates the energy efficiency optimizations for single-cell and multi-cell RSMA-based VLC broadcast systems. The precoding and power allocation problems are formulated and solved using successive convex approximation algorithms. Simulation results show that the proposed schemes achieve superior energy efficiency with fast convergence.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2022)
Article
Optics
Ali H. Alqahtani, Esam M. Almohimmah, Mohammed T. Alresheedi, Ahmad Fauzi Abas, Ahmad-Adnan Qidan, Jaafar Elmirghani
Summary: This paper applies a NOMA scheme in an indoor VLC system and studies the impact of multi-user interference on system performance. A power allocation method (DOPA) is proposed to minimize symbol error rate by reducing multi-user interference. Simulation results demonstrate the effectiveness of the proposed method in improving system performance.
Article
Engineering, Electrical & Electronic
Xidong Mu, Yuanwei Liu
Summary: A novel semantics-empowered NOMA framework is proposed for resource efficiency enhancement, where a secondary user employs semantic communication while a primary user employs conventional bit-based communication. The performance limits and tradeoffs of the semantics-empowered NOMA framework are investigated, and an opportunistic communication scheme is proposed to strike a balance between performance and interference. Numerical results show the advantages of the proposed opportunistic scheme and the better performance of semantic communication for the secondary user in certain scenarios.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Shuaidong Chen, Bo Liu, Jianxin Ren, Yaya Mao, Xiangyu Wu, Rahat Ullah, Xiumin Song, Yu Bai, Yibin Wan, Yongfeng Wu, Lilong Zhao, Tingting Sun
Summary: In this paper, a power sparse code division non-orthogonal multiple access (PSCD-NOMA) scheme is proposed for next-generation flexible optical access. The proposed scheme considers users' information as a whole and can achieve more users with better performance. Moreover, an irregular-shaped 8 quadrature amplitude modulation (IS-8QAM) constellation diagram is devised for PSCD-NOMA.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Rui Guo, Juanfan Guan, Lixin Wang
Summary: This paper proposes a polar-coded NOMA-VLC system and investigates the impact of power allocation algorithms on system performance. A dynamic power allocation algorithm is proposed to prioritize the quality of service for user1 and maximize the total transmission rate. Simulation results demonstrate that the polar-coded NOMA-VLC system achieves better performance compared to traditional systems.
OPTICAL ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Rishu Raj, Kumud Jindal, Abhishek Dixit
Summary: Visible light communication (VLC) is a crucial technology for the sixth generation (6G) communication networks, which can meet the massive connectivity requirements of the Internet of things (IoT). It has been shown that using fair power allocation (FPA) scheme in NOMA-VLC systems can improve fairness and system performance, regardless of changes in system parameters.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yibin Wan, Bo Liu, Jianxin Ren, Rahat Ullah, Yaya Mao, Suiyao Zhu, Shuaidong Chen, Xiangyu Wu, Feng Wang, Tingting Sun, Yongfeng Wu, Lilong Zhao
Summary: This paper proposes a novel optical non-orthogonal multiple access (NOMA) scheme based on orthogonal chirp division multiplexing (OCDM) for low-cost passive optical network (PON) systems. The proposed scheme improves spectral efficiency and serves more users by multiplexing spectrally overlaid OCDM signals in power domain. Experimental results show that OCDM-NOMA with higher-order modulation can be a promising candidate for next-generation PONs.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yanyu Cheng, Kwok Hung Li, Yuanwei Liu, Kah Chan Teh, George K. Karagiannidis
Summary: This paper investigates the outage performance of NOMA networks assisted by IRSs with discrete phase shifts, deriving asymptotic expressions for the upper and lower bounds of outage probability in the high SNR regime, and obtaining the diversity order. Results show that a 3-bit resolution for IRSs achieves near-optimal outage performance, indicating the superiority of IRSs over full-duplex decode-and-forward relays.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2021)
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
Baolong Li, Xiaomei Xue, Simeng Feng, Wei Xu
Summary: ABLO-OFDM is a novel scheme that achieves high spectral efficiency and low complexity, outperforming conventional O-OFDM in visible light communication.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Telecommunications
Tang Tang, Tao Shang, Qian Li
Summary: This letter investigates the impact of multiple shadows on indoor visible light communication systems, deriving mathematical expressions for shadow area and position, as well as considering the effect of room size on performance.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Chemistry, Physical
Abrar U. U. Hassan, Sajjad H. H. Sumrra, Wardha Zafar, Muhammad Imran, Sadaf Noreen, Muhammad Irfan
Summary: Nine new dyes were designed by end-capped modelling of a dithiophene-based 6,6 '-di(thiophen-2-yl)-4,4 '-bipyrimidine (DTB) moiety. These dyes exhibited smaller energy gaps and significant nonlinear optical response, making them potential contenders for nonlinear optical applications.
Article
Engineering, Electrical & Electronic
Yalcin Ata, Hanaa Abumarshoud, Lina Bariah, Sami Muhaidat, Muhammad Ali Imran
Summary: Intelligent reflecting surfaces (IRS) offer significant enhancement in the reliability of underwater optical wireless communication (OWC) systems under attenuation, beam displacement, and turbulence effects. The combination of a large number of reflecting surfaces and a larger aperture diameter yields a more noticeable improvement. This study quantifies the performance enhancement offered by the integration of IRS technology in the context of underwater OWC, considering factors such as underwater attenuation, pointing error, and turbulence effects.
IEEE PHOTONICS JOURNAL
(2023)
Article
Computer Science, Information Systems
Ahmed A. Al-Habob, Octavia A. Dobre, Sami Muhaidat, H. Vincent Poor
Summary: This article focuses on reducing the energy consumption of a fleet of UAVs disseminating information to IoT devices. A framework is provided that optimizes the selection of UAVs, file placement, and trajectory planning to minimize energy consumption. Three solution approaches, including a multi-chromosome GA, a hybrid genetic-ant colony algorithm, and a GA with heuristic file placement, are developed to solve the combinatorial optimization problem. The proposed approaches minimize energy consumption and optimize the number of participating UAVs.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Biomedical
Yao Ge, Ahmad Taha, Syed Aziz Shah, Kia Dashtipour, Shuyuan Zhu, Jonathan Cooper, Qammer H. Abbasi, Muhammad Ali Imran
Summary: WiFi sensing has gained significant attention as a potential mechanism for remote monitoring of the aging population without deploying devices on users' bodies. It has the potential to detect critical events such as falls, sleep disturbances, and respiratory disorders. Unlike other sensing methods, WiFi technology is easy to implement and unobtrusive. This paper reviews the current state-of-the-art research on WiFi-based sensing and discusses its healthcare applications and open research challenges.
IEEE REVIEWS IN BIOMEDICAL ENGINEERING
(2023)
Article
Computer Science, Information Systems
Osamah S. Badarneh, Mohamad K. Awad, Sami Muhaidat, Fares S. Almehmadi
Summary: This article investigates a wireless system with decode-and-forward (DaF) scheme, where an unmanned aerial vehicle (UAV) communicates with a ground control station (GCS) through an intelligent reflecting surface (IRS). The UAV moves in a complex urban environment using a three-dimensional (3D) random waypoint model at low altitude. The UAV's signal is decoded and forwarded by a stationary relay station (RS) over an IRS-aided line-of-sight (LoS) link to the GCS. The statistical expressions for various performance metrics are derived and validated through numerical examples and Monte-Carlo simulations.
IEEE SYSTEMS JOURNAL
(2023)
Article
Chemistry, Analytical
Mohammed E. E. Yassin, Khaled F. A. Hussein, Qammer H. H. Abbasi, Muhammad A. A. Imran, Shaimaa A. A. Mohassieb
Summary: This article proposes a wideband low-profile G-shaped strip antenna on a flexible substrate for off-body communication in biomedical applications. The antenna is designed to generate circular polarization (CP) from 5-6 GHz and linear polarization in the frequency range of 6-19 GHz. Through simulation and experimental measurements, the antenna's performance and impedance matching capabilities are investigated. The results show that the antenna achieves a 3dB-AR bandwidth of 18% (5-6 GHz) and an impedance matching bandwidth of 117% (5-19 GHz), with a maximum gain of 5.37 dBi and a radiation efficiency of 98%.
Article
Chemistry, Analytical
Mahmoud A. A. Shawky, Syed Tariq Shah, Qammer H. H. Abbasi, Mohamed Hussein, Muhammad A. A. Imran, Syed Faraz Hasan, Shuja Ansari, Ahmad Taha
Summary: Wireless communication is an integral part of modern vehicles, but securing the exchanged information between terminals is challenging. Physical layer secret key generation using wireless-channel responses shows promise for secure vehicular communication. This study introduces a key-generation approach using a reconfigurable intelligent surface (RIS) to improve performance in low signal-to-noise ratios and non-line-of-sight conditions.
Article
Chemistry, Analytical
Habib Ullah Manzoor, Ahsan Raza Khan, David Flynn, Muhammad Mahtab Alam, Muhammad Akram, Muhammad Ali Imran, Ahmed Zoha
Summary: This paper presents FedBranched, a clustering-based framework for federated learning that addresses the challenges arising from high diversity in client data. The framework utilizes probabilistic methods and hidden Markov model clustering to create branches and assign global models. Experimental results on short-term load forecasting demonstrate the effectiveness of FedBranched in improving performance.
Review
Environmental Sciences
Qian Wang, Wenfeng Li, Zheqi Yu, Qammer Abbasi, Muhammad Imran, Shuja Ansari, Yusuf Sambo, Liwen Wu, Qiang Li, Tong Zhu
Summary: In recent years, there has been a rise in major natural disasters and public safety accidents worldwide. This has prompted countries to strengthen and improve their emergency communication network construction and related technology research. This paper offers a comprehensive survey of the current state and development of emergency communication networks. It explores various technologies such as satellite networks, ad hoc networks, cellular networks, and wireless private networks, as well as the networks currently used in emergency rescue. The survey provides important findings and proposes future directions for the development of emergency communication networks.
Article
Computer Science, Artificial Intelligence
Mohammad Al-Quraan, Lina Mohjazi, Lina Bariah, Anthony Centeno, Ahmed Zoha, Kamran Arshad, Khaled Assaleh, Sami Muhaidat, Merouane Debbah, Muhammad Ali Imran
Summary: Technological advancements in wireless networks have led to an increase in the number of connected devices. The surge in data volume powered by AI in wireless systems has created new opportunities for data-driven intelligent services. This article introduces federated learning (FL), a technique that brings machine learning to the edge of wireless networks, and explores its applications, challenges, and limitations. The effectiveness of FL is also examined in the context of future communication systems. The survey aims to provide a comprehensive overview of FL applications and serve as a foundation for understanding the topic.
IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTATIONAL INTELLIGENCE
(2023)
Review
Remote Sensing
Attai Ibrahim Abubakar, Iftikhar Ahmad, Kenechi G. Omeke, Metin Ozturk, Cihat Ozturk, Ali Makine Abdel-Salam, Michael S. Mollel, Qammer H. Abbasi, Sajjad Hussain, Muhammad Ali Imran
Summary: Unmanned aerial vehicles (UAVs) have emerged as a promising option to enhance capacity in wireless communication networks. By deploying base stations on UAVs and operating them as flying base stations, additional capacity can be provided where it is needed. However, the limited energy storage of UAVs requires optimization of their energy consumption to increase flight time. This survey investigates different energy optimization techniques, classified as conventional and machine learning methods, and also includes a tutorial on optimization methods, power supply, and charging mechanisms of UAVs.
Article
Telecommunications
Hossien B. Eldeeb, Shimaa Naser, Lina Bariah, Sami Muhaidat
Summary: This letter investigates the use of optical reflecting intelligent surfaces (RISs) to relax the line-of-sight (LoS) constraint in vehicle-to-vehicle visible light communication (V2V-VLC). A closed-form expression for the number of RIS elements required to achieve a target energy/spectral efficiency in RIS-aided V2V-VLC system is derived based on realistic V2V-VLC channel modeling. The impact of transceiver, system, and environment parameters on the system performance is further investigated.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yao Ge, Wenda Li, Muhammad Farooq, Adnan Qayyum, Jingyan Wang, Zikang Chen, Jonathan Cooper, Muhammad Ali Imran, Qammer H. Abbasi
Summary: The LoGait system utilizes LoRa signals to recognize gait in indoor environments, overcoming challenges such as video quality, occlusion, and privacy concerns. It enables a larger sensing range of gait recognition compared to WiFi-based systems.
IEEE SENSORS JOURNAL
(2023)
Proceedings Paper
Computer Science, Cybernetics
Adwait Naik, Sajjad Hussain, Linda Steedman, Guodong Zhao, Muhammad A. Imran
Summary: This paper introduces a novel VR-robot interface that allows users to remotely operate a robot and visualize its actions through a VR device. The interface includes a haptic feedback device to enhance the user experience. The authors also plan to extend the interface to support multiple robots.
PROCEEDINGS OF THE 4TH AUGMENTED HUMANS INTERNATIONAL CONFERENCE 2023, AHS2023
(2023)
Article
Computer Science, Information Systems
Chang Sheng Lee, Yaolong Lou, Minghui Li, Qammer H. Abbasi, Muhammad Ali Imran
Summary: This study presents a new and effective method for assessing lung function using acoustic imaging, which links acoustic lung images with pathologic changes. It also analyzes the practicality and extreme design of the acoustic imaging system on the resolution of the located nidus. The research may be used to offer recommendations for acoustic imaging system design and assess the number of sensors in current systems.
