Article
Telecommunications
Yuan Gao, Haixia He, Rongjun Tan, Junho Choi
Summary: A combined spatial-temporal energy harvesting and relay selection scheme is proposed to improve the energy efficiency and spectrum utilization of Cognitive Wireless Powered Networks. The setting of a two-layer guard zone effectively reduces the outage probability of the Primary User and improves the EE of CWPNs, while relay selection transmission decreases the outage probabilities of the Secondary Users.
DIGITAL COMMUNICATIONS AND NETWORKS
(2021)
Article
Engineering, Electrical & Electronic
Bin Li, Zhen Yang, Yulong Zou, Jia Zhu, Weifeng Cao, Chenguang Shi
Summary: In this paper, the secure communication problem of a wireless multiuser network is studied in the presence of an eavesdropper. Two EH node aided multiuser scheduling schemes are proposed to enhance the secure communications between BS and multiple users. The security-reliability performance of the proposed schemes and a direct transmission scheme are analyzed, and an iterative algorithm is proposed to determine the optimal time allocation factor. Numerical results show that the EH node can improve the network's performance more significantly as a friendly jammer.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Telecommunications
Xiao Jiang, Peng Li, Ruchuan Wang
Summary: This paper investigates the performance of an energy-harvesting relay network with multiple sources and decode-and-forward relays. The proposed optimal power splitting and joint source-relay selection scheme achieves lower outage probability compared to other schemes, and the outage probability performance can be improved by increasing the number of sources and/or relays.
WIRELESS PERSONAL COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Nadica Kozic, Vesna Blagojevic, Predrag Ivanis
Summary: The paper analyzes a cooperative cognitive wireless system with limited computational resources, suitable for small-sized devices. It explores the outage probability of the cognitive network and validates the results for different relaying protocols.
Article
Computer Science, Information Systems
Avik Banerjee, Santi P. P. Maity
Summary: This study investigates a cognitive radio network with various nodes and fusion center, applying collaborative spectrum sensing and energy harvesting to enhance network performance.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2023)
Article
Engineering, Electrical & Electronic
Addanki Prathima, Devendra S. Gurjar, Yuming Jiang, Suneel Yadav
Summary: This paper examines a radio-frequency energy harvesting enabled cognitive radio network in the presence of transceiver hardware impairments. Using SWIPT technology, one of the secondary nodes harvests energy from the primary signal and provides relay assistance for the primary transmission to improve link reliability and alleviate spectrum scarcity. Numerical results are provided to evaluate system performance, and two optimization problems are proposed to optimize system performance.
PHYSICAL COMMUNICATION
(2022)
Article
Telecommunications
Zhihua Lin, Guang Li, Jianqing Li
Summary: The integration of energy harvesting and cognitive radio addresses energy limitation and spectrum scarcity in IoT networks. The Two-User Relay protocol presented in this paper improves spectrum sharing performance by coordinating energy distribution between primary and secondary signals.
WIRELESS PERSONAL COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Chandan Kumar Singh, Vibhum Singh, Prabhat Kumar Upadhyay, Min Lin
Summary: In this study, a system incorporating energy harvesting, cognitive radio, and nonorthogonal multiple access techniques is proposed, where a secondary transmitter node harvests energy from a primary transmitter's radio-frequency signal for relaying purposes. Two spectrum sharing cooperation schemes are implemented to address hardware impairments and distortion noises impact, evaluating system throughput and energy efficiency. The results demonstrate the advantages of the proposed schemes over traditional transmission and access methods.
IEEE SYSTEMS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Kefeng Guo, Kang An, Feng Zhou, Theodoros A. Tsiftsis, Gan Zheng, Symeon Chatzinotas
Summary: This paper investigates the impact of hardware impairments on the secrecy performance of NOMA-based integrated satellite multiple-terrestrial relay networks, considering two eavesdropping cases and providing closed-form expressions and asymptotic analysis for the secrecy outage probability. Monte Carlo simulations are also conducted to evaluate the secrecy energy efficiency.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Oluwatosin Ahmed Amodu, Mohamed Othman, Nor Kamariah Noordin, Idawaty Ahmad
Summary: This article develops a framework for outage probability of energy harvesting underlay cognitive radio networks, where primary users have constant energy sources and secondary users harvest energy from primary devices. The study reveals the impacts of the number of primary hops on relay selection region and harvested energy, and provides an expression for total outage probability considering N primary hops. Additionally, the effects of other relevant parameters on outage probability are detailed.
IEEE SYSTEMS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Yi Luo, Lihua Zhou, Jian Dong, Yang Sun, Kaixin Xi, Jiahui Xu, Xindi Yang
Summary: This paper investigates the outage performance of an energy harvesting underlay cognitive multihop relay network. The author accurately approximates the outage probability over fading channels and proposes a chaotic dragonfly algorithm to optimize energy harvesting and reduce outage probability.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2022)
Article
Telecommunications
Nguyen Tien Tung, Pham Minh Nam, Phu Tran Tin
Summary: This paper proposes a Two-Way Cognitive Relay Network (TWCRN) and evaluates the performance of secondary networks under hardware impairments and co-channel interference from primary networks. The closed-form expressions of outage probability and throughput over Rayleigh fading channels in two cases were derived, and the energy efficiency issue and optimal position of the relay for maximizing system throughput were investigated. The derivations were verified by Monte Carlo simulation.
DIGITAL COMMUNICATIONS AND NETWORKS
(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
Telecommunications
Renjith Ravindran Unnithan Jalaja, P. G. S. Velmurugan, S. J. Thiruvengadam
Summary: This paper examines the secrecy outage probability and outage performance in a bidirectional cooperative cognitive radio system with the presence of an eavesdropper. The system employs spatial modulation technique to enhance spectral efficiency and energy efficiency. Simulation results demonstrate the proposed system's behavior and the impact of various system parameters.
WIRELESS PERSONAL COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Anu Goel, Richa Bhatia
Summary: This paper investigates mixed RF/FSO decode and forward two-way relaying with consideration of hardware impairments and interference. A double relay selection scheme is employed to combat these effects. The fading characteristics of the RF and CCI links are modeled using the Rayleigh distribution, while atmospheric turbulence on the FSO link follows the Malaga irradiance model. The outage probability is analyzed and a closed-form expression is derived using the Meijer-G function. The impact of various factors on communication channel reliability, such as node availability, optical demodulation, turbulence, pointing error, interference, and hardware impairment, is confirmed through analytical results and Monte-Carlo simulations.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Pham Minh Nam, Ha Duy Hung, Tran Trung Duy, Thuong Le-Tien
Summary: This paper evaluates the outage probability (OP) and intercept probability (IP) of physical-layer security based MIMO networks adopting cooperative jamming (Coop-Jam). The study considers a scenario where a multi-antenna source communicates with a multi-antenna destination using transmit antenna selection (TAS)/selection combining (SC) and faces a multi-antenna eavesdropper using SC. The results demonstrate the advantages of the proposed RAND and SHORT methods over the corresponding one without using Coop-Jam.
Article
Engineering, Electrical & Electronic
Pham Ngoc Son, Tran Trung Duy, Pham Viet Tuan, Tan-Phuoc Huynh
Summary: This paper proposes a scheme for short packet communication in a cognitive radio network assisted by an intelligent reflecting surface (IRS). The proposed scheme utilizes the IRS to enhance the signal-to-noise ratio and optimize the transmitting power of the secondary source. Simulation and analysis results show that the performance can be improved by installing more reconfigurable reflectors or adjusting the blocklength. The proposed IRS protocol outperforms underlay relaying protocols using two time slots for data transmission.
Article
Engineering, Electrical & Electronic
Dinh Thi Tam, Ba Cao Nguyen, Sinh Cong Lam, Nguyen Van Vinh, Tan N. Nguyen
Summary: This paper proposes a combination of transmit antenna selection (TAS) scheme and multiple reconfigurable intelligent surfaces (RISs) to reduce the symbol error rate (SER) of millimeter-wave (MW) communications. The TAS scheme significantly reduces the computational complexity, and the numerical results confirm the benefits of TAS and multi-RIS in the MW communications. Applying TAS decreases the transmit power and the SERs of multi-RIS-aided MW communications are much lower than those without RISs. The paper also investigates various methods for enhancing the performance of multi-RIS-aided MW communications with TAS.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Tan N. Nguyen, Dinh-Hieu Tran, Trinh Van Chien, Van-Duc Phan, Nhat-Tien Nguyen, Miroslav Voznak, Symeon Chatzinotas, Bjorn Ottersten, H. Vincent Poor
Summary: This article investigates the physical layer security with radio frequency energy harvesting in a simultaneous wireless information and power transfer cooperative network. A low-complexity sensor source selection scheme is proposed, and two relaying strategies are considered. Analytical expressions for the outage probability and intercept probability are derived, and simulation results show the superiority of the proposed scheme.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Information Systems
Nhat-Tien Nguyen, Hong-Nhu Nguyen, Ngoc-Long Nguyen, Anh-Tu Le, Tan N. N. Nguyen, Miroslav Voznak
Summary: This paper investigates the performance of a NOMA-based hybrid Satellite-Terrestrial relays system using mmWave technology. The system utilizes multiple antennas and the AF protocol to forward satellite's information. The best relay is chosen based on the rain coefficient as the fading factor. The theoretical derivation is validated through simulation results and the results demonstrate the superiority of NOMA over OMA method.
Article
Computer Science, Information Systems
Tan Nhat Nguyen, Dinh-Hieu Tran, Trinh Van Chien, Van-Duc Phan, Miroslav Voznak, Symeon Chatzinotas
Summary: This article investigates the security and reliability analysis for a novel satellite-terrestrial network. It examines the transmission of confidential information from a satellite to a ground user with the help of multiple relay nodes and the presence of an eavesdropper. The study analyzes the effects of imperfect channel state information and deploys a friendly jammer for secure transmission. The mathematical analyses are validated through Monte Carlo simulations, and the impact of various key parameters is examined.
IEEE SYSTEMS JOURNAL
(2023)
Article
Computer Science, Information Systems
Tan N. Nguyen, Nguyen Nhu Thang, Ba Cao Nguyen, Tran Manh Hoang, Phuong T. Tran
Summary: This article investigates the combination of two new technologies, full-duplex (FD) transmission and intelligent reflecting surface (IRS), in a wireless communication system. The performance of an IRS-aided bidirectional FD communication system is evaluated in a practical scenario, considering imperfect self-interference (SI) cancellation and hardware impairments (HIs). Closed-form expressions for the ergodic capacity (EC) and symbol error rate (SER) of the IRS-aided FD-HI system over Rayleigh fading channels are derived, and their correctness is verified through Monte-Carlo simulations. The performance of the IRS-aided FD-HI system is compared with that of other systems, including IRS-aided FD-ideal hardware (ID), half-duplex (HD)-HI, and HD-ID systems, to clarify the effects of residual SI and HIs. The numerical results demonstrate that residual SI and HIs have a strong impact on the EC and SER of the IRS-aided FD-HI system. Therefore, depending on the residual SI and HI levels and the requirements for EC and SER in practice, the transmit power of terminals and number of reflecting elements in the IRS can be appropriately adjusted to enhance system performance and save energy consumption.
IEEE SYSTEMS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Sergej Jakovlev, Tomas Eglynas, Valdas Jankunas, Miroslav Voznak, Mindaugas Jusis, Pavol Partila, Jaromir Tovarek
Summary: Each physical impact during marine container handling operations leads to physical deformation of the containers' backbone structure. The spreaders of quay cranes, even at low accelerations, have enough force to bend the metal parts of the container corners during additional hooking procedures. The Impacts Detection Methodology (IDM) provides real-time detection of concurrent impacts and shows that more impact events occur when containers are taken from the upper parts of the ship compared to the shafts.
Article
Computer Science, Information Systems
Lam-Thanh Tu, Tan N. Nguyen, Phuong T. Tran, Tran Trung Duy, Quang-Sang Nguyen
Summary: This paper investigates the performance of broadcasting networks using Fountain codes with receiver diversity techniques. The closed-form expressions of the cumulative distribution function (CDF), the probability mass function (PMF), and the raw moments of the required time slots are derived under two diversity schemes. Numerical results are provided to verify the accuracy of the networks and highlight the behaviors of these metrics with respect to key parameters. Furthermore, the advantages of the maximal ratio combining (MRC) scheme over the selection combining (SC) scheme in broadcasting networks are confirmed.
JOURNAL OF INFORMATION AND TELECOMMUNICATION
(2023)
Article
Computer Science, Information Systems
Quang-Sang Nguyen, Tan N. Nguyen, Lam-Thanh Tu
Summary: This paper investigates the reliability and security aspects of simultaneous wireless information and power transfer (SWIPT) enabled full-duplex (FD) relaying in non-orthogonal multiple access (NOMA) networks. The outage probability (OP) at both end-users is derived in closed-form expression from the reliability viewpoint. Intercept probability (IP) is considered a useful metric to measure system security, and a closed-form expression for IP is also derived. Numerical results confirm the correctness of the mathematical framework and provide insights into the impact of key parameters such as transmit power, power-splitting (PS) ratio, and power allocation ratio on both metrics.
JOURNAL OF INFORMATION AND TELECOMMUNICATION
(2023)
Article
Computer Science, Information Systems
Phuong T. Tran, Ba Cao Nguyen, Tran Manh Hoang, Tan N. Nguyen
Summary: This article proposes the integration of multiple reconfigurable intelligent surfaces (RISs) with a relay to improve the performance of a low-power wide-area (LPWA) network. The use of RISs enhances the intermediate links between the IoT sensor and the relay, as well as between the relay and the gateway, resulting in better performance for the network. The article also investigates the impact of various factors such as RIS placement, Nakagami-m parameters, data transmission rate, and modulation scheme on the performance of the network.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2023)
Article
Computer Science, Information Systems
Dinh Tung Vo, Trinh Van Chien, Tan N. Nguyen, Dinh-Hieu Tran, Miroslav Voznak, Byung Seo Kim, Lam Thanh Tu
Summary: In this research, a low-complexity but efficient relay selection method is proposed for a cooperative relaying system that supports simultaneous wireless information and power transfer. The performance analysis of the system is conducted by considering the presence of an eavesdropper and an EH-friendly jammer. Monte-Carlo simulations are used to validate the proposed method's correctness and efficiency.
Article
Engineering, Electrical & Electronic
Lubos Rejfek, Karel Juryca, Tan N. N. Nguyen, Ladislav Beran, Miroslav Voznak
Summary: This article introduces an algorithm for processing data from a GPS receiver, which does not merge pseudoranges from different carrier waves. Compared with the dual-frequency approach, the newly developed algorithm works accurately and can independently estimate propagation delays.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Computer Science, Information Systems
Hung Nguyen, Tan N. Nguyen, Bui Vu Minh, Thu-Ha Thi Pham, Anh-Tu Le, Miroslav Voznak
Summary: This paper presents a controllable analysis framework for evaluating the reliability and security of underlay cognitive radio networks with non-orthogonal multiple access (NOMA). The framework improves the secrecy performance of the primary networks through transmit antenna selection. The paper also studies the impact of quadrature-phase imbalance on the system and shows numerical results of performance improvement and meeting security requirements.
