Article
Engineering, Electrical & Electronic
Shubham Bisen, Parvez Shaik, Vimal Bhatia
Summary: This study investigates an energy harvesting-based multi-relay downlink cooperative non-orthogonal multiple access system, analyzing outage probability and ergodic rate for users under different channel conditions. The analytical results are verified through Monte Carlo simulations.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Kaustubh Ranjan Singh, Parul Garg
Summary: This paper investigates a dual-hop time-switched energy harvesting amplify forward relay system with significant performance improvements in terms of system outage probability and throughput achieved by adding a direct link between the source and destination nodes compared to a traditional EH relay system without a direct link.
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2022)
Article
Computer Science, Information Systems
Zih-Sin Wang, Liang-Hung Lin, Jyh-Horng Wen, Yen-Ju Lin, Chien-Erh Weng
Summary: This paper studies the performance of conventional cooperative communication and cooperative communication with SWIPT under an AF relaying network, revealing that the cooperative communication with SWIPT has better outage probability only when the distance between relay node and source node is less than one. Additionally, with the diversity of direct path and relay path, the outage probability of cooperative communication with EH under an AF relaying network has been significantly reduced.
Article
Engineering, Multidisciplinary
Dong Qin
Summary: This paper investigates the resource scheduling problem in a cooperative cognitive radio network using orthogonal frequency division multiplexing technology. By considering the different priorities of primary and secondary users, the goal is to minimize the symbol error probability for secondary users while ensuring the quality of service for primary users. The joint algorithm of power and subcarrier allocation is analyzed and simulated, demonstrating excellent performance in relay location deployment, convergence analysis, and symbol error probability reduction.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2022)
Article
Computer Science, Information Systems
Hanh Dang-Ngoc, Diep N. Nguyen, Khuong Ho-Van, Dinh Thai Hoang, Eryk Dutkiewicz, Quoc-Viet Pham, Won-Joo Hwang
Summary: This article proposes a cooperative friendly jamming framework for swarm unmanned aerial vehicle (UAV)-assisted amplify-and-forward (AF) relaying networks with wireless energy harvesting (EH). The framework allows UAVs to relay information and jam eavesdroppers by collaborating in wireless energy harvesting. The theoretical analysis and Monte Carlo simulations demonstrate the effectiveness of the proposed framework in achieving a desired secrecy protection level.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Civil
Baofeng Ji, Ying Han, Yanan Wang, Dun Cao, Fazhan Tao, Zhumu Fu, Peng Li, Hong Wen
Summary: This paper proposes a relay cooperative transmission algorithm for handling aggregated interference in IoV networks, and derives closed expressions of the outage probability and ergodic capacity of the system based on mathematical theoretical knowledge. Simulation experiments verify the effectiveness of the proposed scheme, improving the transmission rate of the system.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
V Aswathi, A. Babu
Summary: This paper investigates the outage and throughput performance of a full-duplex cooperative relaying based non-orthogonal multiple access system with energy harvesting. Analytical expressions for outage probabilities and optimal factors are derived to minimize system outage probability, and alternating optimization technique is used to determine jointly optimal factors. The proposed schemes significantly improve system outage and throughput performance according to numerical and simulation investigations.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Rahul Bajpai, Harishankar Ramesh, Naveen Gupta, Vivek Ashok Bohara
Summary: This letter proposes a multicarrier full-duplex (FD) cooperative UAV-to-UAV (U2U) communications system, where the UAV transmitter (UT) works as an FD relay for cellular uplink transmission and utilizes a portion of cellular subcarriers for its own transmission to the UAV receiver (UR). An analytical framework is utilized to derive cellular and U2U outage probabilities, and the results show that U2U communications with a substantial outage performance is feasible while maintaining a minimal cellular outage constraint.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Chemistry, Analytical
Tien-Tung Nguyen, Sang Quang Nguyen, Phu X. Nguyen, Yong-Hwa Kim
Summary: This paper investigates the performance of NOMA-based full-duplex IoT relay systems over Nakagami-m fading channels with SWIPT, showing superior performance compared to OMA systems under perfect SIC and good performance with low-to-medium SNR under imperfect SIC. A low-complexity algorithm is provided to optimize system throughput.
Article
Engineering, Electrical & Electronic
Dinh-Thuan Do, Anh-Tu Le, Yuanwei Liu, Abbas Jamalipour
Summary: The development of UAVs has revolutionized wireless communications, but their widespread use is limited by short battery life. Research focuses on energy efficiency, with proposals for energy harvesting techniques in UAV networks needing further exploration. This paper comprehensively evaluates the performance of UAV relay networks using NOMA technique, providing insights into outage and ergodic capacity performance.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Phu Tran Tin, Nguyen Thanh Luan, Tan N. Nguyen, Minh Tran, Tran Trung Duy
Summary: This paper proposes three interference cancellation based multi-hop decode-and-forward (DF) relaying protocols to enhance system throughput under half-duplex and hardware imperfection constraints. The protocols utilize interference cancellation techniques and parallel transmission to increase data rates, while considering imperfect interference cancellation and co-channel interference.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Baha Eddine Youcef Belmekki, Abdelkrim Hamza, Benoit Escrig
Summary: This paper investigates the performance of cooperative transmissions at intersections in the presence of interference for VSCs, considering factors such as decoding strategy and vehicles mobility, and determining the optimal relay position. The research shows that the outage probability performance of VSCs is higher at intersections than on highways, and the outage probability does not improve after the number of infrastructure relays reach a threshold value. The analytical results are validated through Monte-Carlo simulations.
DIGITAL SIGNAL PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
M. T. Dabiri, S. Khankalantary, M. J. Piran, I. S. Ansari, M. Uysal, W. Saad, C. S. Hong
Summary: This paper analyzes the performance of a UAV-based free-space optical relay system with amplify-and-forward relaying. The statistical probability of end-to-end signal-to-noise ratio is obtained under various factors, and closed-form expressions for bit-error rate and outage probability are derived and verified through simulations. The optimal UAV position for minimum outage probability is highly dependent on the optical beamwidth, and the relay-to-destination link length must be shorter than the source-to-destination link for minimum outage probability. By decreasing the beamwidth at the destination, the optimal value for the source-to-destination link length increases.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
L. Wang, W. Tang, Y. Fan, T. Yan, L. Jiang
Summary: This letter investigates the application of PDMA in satellite-terrestrial networks and compares the outage probability, ergodic capacity, and system throughput between PDMA and conventional OMA technologies. The results demonstrate that PDMA-based hybrid satellite-terrestrial relay networks outperform other systems in terms of OP and ergodic capacity.
PHYSICAL COMMUNICATION
(2022)
Article
Engineering, Civil
Yancheng Ji, Wei Duan, Miaowen Wen, Payam Padidar, Jing Li, Nan Cheng, Pin-Han Ho
Summary: This paper studies a cooperative D2D system with NOMA, comparing the performance of single signal decoding and MRC decoding schemes. The results show that the proposed D2D-NOMA scheme performs better under fading channels, especially when employing the MRC decoding scheme.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Telecommunications
Zhifeng Tang, Zhuo Sun, Nan Yang, Xiangyun Zhou
Summary: This paper proposes a new scheduling policy to minimize the cost of the age of information in a multiuser system. By introducing service charge and deriving closed-form expression for the Whittle index, the scheduling policy is designed to improve performance compared to existing policies, as demonstrated by numerical results.
IEEE COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
A. A. Nasir, H. D. Tuan, E. Dutkiewicz, H. Poor, L. Hanzo
Summary: This study investigates relay-aided multi-user OFDM systems, where multiple sources transmit signals to a multi-antenna relay in the first stage and the relay amplifies and forwards the composite signal to all destinations in the second stage. The relay is powered by wireless power transfer and recycled self-interference. The power allocations at the source nodes and the relay are jointly designed to maximize the network's sum-throughput. The results show that improper Gaussian signaling (IGS) outperforms proper Gaussian signaling (PGS) in terms of both sum-rate and individual user-rate, and the recycled self-interference provides a beneficial complementary energy source.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Akram Shafie, Nan Yang, Sheeraz A. Alvi, Chong Han, Salman Durrani, Josep Miquel Jornet
Summary: In this study, spectrum allocation for terahertz band communication systems is explored, taking into account the unique characteristics of THz channels. By dividing the spectrum of interest into sub-bands with unequal bandwidths and investigating the impact of sub-band assignment on multi-connectivity enabled systems, higher throughput can be achieved by enabling and optimizing adaptive sub-band bandwidth. The proposed sub-band assignment strategy outperforms existing strategies, particularly when selecting spectrum with the lowest average molecular absorption coefficient.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Review
Energy & Fuels
Naveed Iqbal, Mudassir Masood, Ali Arshad Nasir, Khurram Karim Qureshi
Summary: Energy harvesting converts ambient energy into electrical energy, offering opportunities for realizing wireless sensors. Seismic exploration can benefit significantly from this technology as energy harvesting equipped geophones can reduce the costs and weight associated with cables. However, due to the random and intermittent nature of harvested energy, geophones must be designed to tap into multiple energy sources for stable operation. Extensive research has been conducted on energy harvesting from various sources, but its application in the seismic context has not been thoroughly investigated. This survey provides a comprehensive literature review on energy harvesting methods suitable for direct adaptation in geophones, focusing on small form factor circuits and systems capable of harvesting energy from wind, sun, vibrations, temperature difference, and radio frequencies. Case studies are presented to assess the suitability of these methods, and a design for an energy harvesting equipped geophone is proposed.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Mathematics, Applied
Ross Pure, Salman Durrani, Fei Tong, Jianping Pan
Summary: This paper presents a novel framework for analytically computing the closed form probability density function (PDF) of the distance between two randomly distributed points. The framework is validated through simulations and comparison with existing literature, and its versatility and advantages are demonstrated by deriving closed form results for a case not yet reported. Additionally, a Mathematica implementation allows users to define and determine distance distributions numerically for arbitrary polygons.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2022)
Article
Telecommunications
Zeeshan Kaleem, Waqas Khalid, Ali Muqaibel, Ali Arshad Nasir, Chau Yuen, George K. Karagiannidis
Summary: This paper proposes a 3D ABS placement and power allocation algorithm assisted by K-means and Q-learning, aiming to improve the system's total capacity. The proposed approach achieves significant performance gains compared to other schemes.
IEEE COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Huabo Fu, Zhichao Sheng, Ali A. Nasir, Ali H. Muqaibel, Lajos Hanzo
Summary: This study investigates non-orthogonal UAV-aided secure downlink transmissions in the presence of multiple colluding eavesdroppers, optimizing UAV trajectory, transmit power, and power splitting ratio to maximize secrecy rate. An iterative algorithm is proposed based on block coordinate descent and successive convex approximation techniques, demonstrating superiority in numerical results.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Zhichao Sheng, Huabo Fu, Ali Arshad Nasir, Rui Wang, Ali H. Muqaibel, Yong Fang
Summary: This paper investigates secure uplink and downlink communications between an unmanned aerial vehicle (UAV) and multiple user equipments (UEs) in the presence of multiple ground-based eavesdroppers (EVs) and unfriendly jammers. A novel secure transmission scheme is proposed to maximize the average secrecy rate (ASR) by optimizing the UAV trajectory, transmit power, and transmission scheduling. The proposed scheme achieves a better ASR than the benchmark schemes.
PHYSICAL COMMUNICATION
(2022)
Article
Engineering, Electrical & Electronic
A. A. Nasir, H. D. Tuan, E. Dutkiewicz, H. Poor, L. Hanzo
Summary: This paper considers a multi-antenna aided base station (BS) that supports multiple multi-antenna downlink users using a reconfigurable intelligent surface (RIS) with programmable reflecting elements (PREs) to improve throughput. The objective is to jointly design the beamformers at the BS and the RIS's PREs by maximizing the geometric-mean of all users' throughput under various access schemes. The paper develops low-complexity algorithms and shows the advantages of non-orthogonal multiple access-aided signaling.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
H. D. Tuan, A. A. Nasir, H. Q. Ngo, E. Dutkiewicz, H. Poor
Summary: This paper discusses a large-scale cell-free massive multiple-input multiple-output network and addresses the power allocation problem to achieve fair service and energy-efficiency. A scalable algorithm is developed and intensive simulations are conducted for validation.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Sheeraz A. Alvi, Yi Hong, Salman Durrani
Summary: This article discusses the application of federated learning in the Internet of Things and proposes a solution based on differential privacy to address privacy concerns and utility unfairness. By controlling the quality of the global model and the expenditure of devices, the proposed scheme significantly reduces the variability of energy costs.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Mahmoud Aldababsa, Anas M. Salhab, Ali Arshad Nasir, Monjed H. Samuh, Daniel Benevides da Costa
Summary: This paper analyzes the performance of multiple reconfigurable intelligent surfaces (RISs)-aided networks with opportunistic RIS scheduling. It provides optimization results on the number of reflecting elements on RISs and the optimal placement of RISs. Accurate closed-form approximations for RIS channels' distributions in non-identically distributed Nakagami-m fading environment are derived. Approximate expressions for outage probability (OP) and average symbol error probability (ASEP) are derived in closed-form. The obtained results show that the considered RIS scenario can provide a diversity order of a/2 K.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Zhichao Sheng, Lei Cui, Ali Arshad Nasir, Rui Wang, Yong Fang
Summary: In this paper, the research focuses on unmanned aerial vehicle (UAV) relay-assisted secure short packet communication. The UAV acts as a decode-and-forward relay to transmit control signals and reduce interference from a ground eavesdropper. Through optimizing the UAV trajectory, transmit power and blocklength allocation, the average secrecy throughput among all actuators is maximized. Numerical results demonstrate that the proposed scheme outperforms benchmark schemes.
PHYSICAL COMMUNICATION
(2023)
Article
Computer Science, Information Systems
Siqiang Wang, Zesong Fei, Jing Guo, Qimei Cui, Salman Durrani, Halim Yanikomeroglu
Summary: This work investigates the uplink transmission in a space-air-ground (SAG) communication network, aiming to maximize the energy efficiency through optimizing user association, power allocation, and UAV trajectory. The joint UA, PA, and UAV trajectory optimization algorithm is developed using the block coordinate descent method. Numerical results demonstrate the superiority of the proposed algorithm in terms of energy efficiency and convergence speed.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Computer Science, Information Systems
Sahar Idrees, Xiaolun Jia, Salman Durrani, Xiangyun Zhou
Summary: Passive technologies like AmBC and IRS have great potential for providing ubiquitous connectivity to IoT devices in future wireless networks. However, AmBC has not been able to fulfill its potential due to interference from direct-link signals, limiting its transmission rate and range. In this work, we propose a novel scheme using an IRS to improve the detection performance of an AmBC system, ultimately enhancing the signal quality.
