Article
Telecommunications
Abbass Nasser, Hussein Al Haj Hassan, Ali Mansour, Koffi-Clement Yao, Loutfi Nuaymi
Summary: This paper investigates the impact of deploying Intelligent Reflecting Surface (IRS) on spectrum sensing in cognitive radio networks, considering two different scenarios. The results show that deploying IRS can significantly enhance spectrum sensing performance.
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING
(2022)
Article
Energy & Fuels
Yan Liu, Xizhong Qin, Yan Huang, Li Tang, Jinjuan Fu
Summary: The demand for spectrum has increased due to the rapid growth of wireless devices and service usage. The development of 5G smart cities and the industrial Internet of Things further exacerbates the problems of spectrum resource shortage and energy consumption. To address these issues, the authors propose an energy-harvesting distributed cooperative spectrum sensing architecture and an improved sensing scheme. Simulation results show that the proposed scheme outperforms the centralized scheme in terms of access capability and energy efficiency.
Review
Chemistry, Analytical
Xavier Fernando, George Lazaroiu
Summary: This article systematically reviews the correlations between spectrum sensing, clustering algorithms, and energy-harvesting technology for cognitive-radio-based IoT networks, and explores their applications and optimization methods.
Article
Computer Science, Information Systems
C. A. L. I. N. VLADEANU, A. L. E. X. A. N. D. R. U. MARTIAN, D. I. M. I. T. R. I. E. C. POPESCU
Summary: This paper presents a new algorithm that uses energy detection to sense the spectrum occupancy in cognitive radio systems. The algorithm performs detection in K consecutive sensing time slots around the current slot. Analytical expressions for false alarm probability and correct detection probability are derived based on a specified primary user traffic model. The results are confirmed through numerical simulations, showing good receiver operating characteristic performance for small K values.
Article
Computer Science, Hardware & Architecture
M. Ranjbar, H. L. Nguyen, N. H. Tran, T. Karacolak, S. Sastry, L. D. Nguyen
Summary: This paper investigates the energy efficiency of a full duplex cognitive radio system in the low-power regime under self-interference cancellation and imperfect spectrum sensing conditions. The study shows the benefits of using simultaneous transmit and sense mode for improved channel sensing, and characterizes the secondary network channel as a Gaussian-Mixture channel due to imperfect spectrum sensing. Analytical limits of energy per bit and spectral efficiency curve are obtained in low-SNR metrics, leading to the identification of optimally efficient signaling strategies. The advantages of full duplex cognitive radio over half duplex systems in terms of energy efficiency are clearly demonstrated.
MOBILE NETWORKS & APPLICATIONS
(2021)
Article
Engineering, Electrical & Electronic
K. Danesh, S. Vasuhi
Summary: This paper proposes a suitable spectrum sensing structure based on game theory for energy harvesting hybrid CRN, aiming to solve the issues caused by insufficient SNR, finite sensing duration, and interferences. It includes three phases: co-operative relay approach for primary user transmission, optimal sensing interval estimation, and co-operative energy efficient spectrum sensing and transmission.
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Dawei Nie, Wenjuan Yu, Qiang Ni, Haris Pervaiz, Geyong Min
Summary: This paper proposes a cluster-based cooperative sensing-after-prediction scheme to simplify the complex physical sensing process and reduce energy consumption and the number of users, through cooperative prediction and optimization.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2023)
Article
Computer Science, Artificial Intelligence
Kaleem Arshid, Zhang Jianbiao, Iftikhar Hussain, Muhammad Salman Pathan, Muhammad Yaqub, Abdul Jawad, Rizwan Munir, Fahad Ahmad
Summary: This study proposes a second priority user transmission system using cooperative spectrum sensing, which achieves energy efficiency, improved sensing performance, increased throughput, and reduced handoff time through optimized energy usage and the utilization of a threshold approach.
EGYPTIAN INFORMATICS JOURNAL
(2022)
Article
Computer Science, Information Systems
D. Srikar, Anveshkumar Nella, Ranjith Mamidi, Ashok Babu, Sudipta Das, Sunil Lavadiya, Abeer D. Algarni, Walid El-Shafai
Summary: This article proposes a cognitive radio (CR) integrated antenna system with 1 sensing and 24 communication antennas for better spectrum utilization efficiency. The communication antennas are realized with an 8-element MIMO configuration operating in different frequency bands, while the sensing antenna senses the spectrum from 2 to 12 GHz. The mutual coupling between the antenna elements is found to be less than -12 dB. The peak gains and radiation efficiencies of the antennas meet the specified requirements, and the diversity characteristics of the MIMO antenna are also evaluated.
Article
Computer Science, Information Systems
Nagwa Shaghluf, T. Aaron Gulliver
Summary: The paper introduces a new PCSS scheme that evaluates SE and EE in a high CRN traffic scenario and formulates a tradeoff problem between SE and EE through joint optimization of sensing duration and PCSS decision threshold. Results demonstrate significant improvements in SE and EE with the proposed PCSS scheme compared to existing schemes, achieving a balance between EE and SE requirements while maximizing efficiency.
Article
Computer Science, Hardware & Architecture
Cuimei Cui, Dezhi Yang, Shi Jin
Summary: Researchers propose a novel multichannel network model incorporating the capability of energy harvesting in cognitive users to enhance spectrum-energy efficiency and achieve green cognitive communication in complex wireless networks.
MOBILE NETWORKS & APPLICATIONS
(2021)
Article
Computer Science, Artificial Intelligence
Anitha Bujunuru, Srinivasulu Tadisetty
Summary: The study focuses on energy harvesting in cognitive radio, introducing a technique where secondary users can harvest energy from primary signals to increase their transmission time and lifetime, and proposes parallel sensing and energy harvesting to enhance throughput.
TRAITEMENT DU SIGNAL
(2021)
Article
Computer Science, Hardware & Architecture
Bao Peng, Zhi Yao, Xin Liu, Guofu Zhou
Summary: This paper proposes a sustainable green cognitive radio network combining dynamic spectrum access (DSA) and energy harvesting. By using a reward mechanism of deep Q-learning multiple networks (DQMN), the system can perform intelligent spectrum sensing, spectrum access, and energy harvesting. Simulation results show that the DQMN-based DSA model can autonomously sense the channel state, harvest energy, and select the appropriate access strategy.
Article
Multidisciplinary Sciences
Alaa Rabie Mohamed, Ahmad A. Aziz El-Banna, Hala A. Mansour
Summary: This paper presents a hybrid sensing model for spectrum detection in CR to enhance the sensing efficiency of traditional techniques, showing improved performance compared to conventional methods.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Malgorzata Wasilewska, Hanna Bogucka, H. Vincent Poor
Summary: This article explores reliable and secure spectrum sensing in cognitive radio using federated learning. It discusses the motivation, architectures, and algorithms of federated learning in spectrum sensing. It provides an overview of security and privacy threats on these algorithms and presents possible countermeasures. The article also includes illustrative examples and offers design recommendations for future cognitive radios.
IEEE COMMUNICATIONS MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Wenzhang Zhang, Jinyao Zhang, Chaoyun Song, Rui Pei, Xuanming Zhang, Haiwen Liu, Congzheng Han, Yi Huang, Jiafeng Zhou
Summary: Due to the low available ambient power level, it is desirable to have a high gain and wide beamwidth antenna. However, it is difficult to achieve both simultaneously. In this study, a multi-port antenna using a nonuniform metasurface is proposed to overcome this limitation. By exciting three modes with complementary radiation patterns, and connecting each feed to a rectifier, the antenna achieves a wide beam and high gain effectively. The proposed rectenna has a beamwidth of 114 degrees with a gain ranging from 8 to 9.8 dBi, and an RF-to-DC conversion efficiency of 3%-67% at 2.45 GHz.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Shangjing Xi, Kai-Da Xu, Shuai Yang, Xue Ren, Wen Wu
Summary: This paper proposes a bandpass frequency selective surface (FSS) with low loss and angular stability based on three metal layers. The FSS structure is built by coupling the top and bottom resonant layers through a metal ring layer. The performance of the FSS is insensitive to the polarization and angle of the incident wave, and the prototype measurements agree with the simulations.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Ibrahim Abuishmais, Hani H. Ahmad, Fadi. R. Shahroury
Summary: This paper presents a WLED driver solution for multi-display screen systems, featuring a single-inductor power stage with independent outputs and multiple WELD strings with independent digital brightness/dimming control for each display. The inclusion of high-side switches enables independent output voltage control and minimized power consumption.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Rawaa Maher, Ahmed Allam, Haruichi Kanaya, Adel B. Abdelrahman
Summary: This paper presents two high-gain, dualband antennas designed to harvest energy from GSM-1800 and the 2.45 GHz ISM frequency bands. The antennas demonstrate good gain and circular polarization characteristics. Additionally, a dualband rectifier is designed to achieve high peak conversion efficiency.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Trapti Sharma, Addagatla Prashanth, Srinivas Bachu, Deepa Sharma, Anil Kumar Sahu
Summary: This article presents two architectures for ternary Schmitt trigger designs based on carbon nanotube technology. The proposed designs demonstrate superior performance in terms of power consumption and power delay product compared to similar designs, and show stability under process variations. These designs have the potential to achieve higher information density and lower power consumption in digital computation.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Tolga Yucehan
Summary: This manuscript introduces an ICFOA-based lossless floating immittance simulator (FIS). The FIS realizes floating capacitance multiplier, simulated floating inductor, and floating frequency-dependent negative resistor through selection of passive elements. Simulation results confirm the ideal performance of the proposed circuit within certain frequency ranges.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Kumar Saurabh, Sukwinder Singh
Summary: This article introduces a method to improve the performance of a power amplifier. By calculating the optimal load and source impedances through source and load-pull analysis, and designing the optimal matching architecture of input and output network using neural network algorithm, the power amplifier achieves high efficiency and gain in the frequency range of 13.75 GHz-14.5 GHz.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Zhengjia Wang, Yongqing Leng, Xin Qiu, Ming Hui, Youbo Jing, Demin Cao
Summary: This paper proposes a novel reconfigurable filter that can flexibly tune both the center frequency and bandwidth simultaneously. The filter consists of a filter network with Chebyshev properties and a parallel resonator. Through simulation and experiments, it has been proven that this reconfigurable filter has a tunable frequency coverage range of 0.4-2 GHz, with a large tunable range.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Audrey Cayron, Christophe Viallon, Ayad Ghannam, Alessandro Magnani, Thierry Parra
Summary: A 4x4 Butler matrix for millimeter-wave communications is presented in this paper, which utilizes a new 3-D Integrated Passive Devices (IPD) process to achieve a higher performance/compactness trade-off. The design incorporates 3-D transformers and solenoids to optimize couplers and phase shifters and results in a wide bandwidth and low insertion loss.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Abdelali Agouzoul, Emmanuel Simeu, Mohamed Tabaa
Summary: This study aims to improve energy efficiency in buildings, specifically in heating control. By utilizing a model predictive control system based on artificial neural network models and advanced technologies such as FPGAs, the study successfully achieved a significant reduction in heating energy consumption in buildings.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Amjad Iqbal, Muath Al-Hasan, Ismail Ben Mabrouk, Pererik Andreasson, Emil Nilsson, Amor Smida, Tayeb A. Denidni
Summary: This study proposes a compact and frequency-adjustable/reconfigurable substrate integrated waveguide antenna for duplex wireless communications. The antenna achieves frequency reconfigurability and high isolation through the use of resonators and dielectric materials. It has stable radiation properties and a wide frequency range, making it suitable for compact reconfigurable devices.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Peyman PourMohammadi, Hassan Naseri, Noureddine Melouki, Fahad Ahmed, Qi Zheng, Amjad Iqbal, Guy A. E. Vandenbosch, Tayeb A. Denidni
Summary: This article presents a novel low-profile self-duplexing antenna with high isolation for out-band operation applications. The antenna features two patches, one rectangular and one triangular, both utilizing the quarter-mode substrate integrated waveguide (QMSIW) cavity for enhanced performance. Miniaturization is achieved through capacitive slots. The antenna operates at both 5.8 and 9.8 GHz frequencies, with impressive alignment between measured and simulated results. It has compact dimensions and 40 dB isolation between its ports, as well as consistent radiation patterns at both frequencies. The gains at 5.8 and 9.8 GHz are 4.1 and 4.6 dBi, respectively. The antenna's frequency bands can be independently tuned by adjusting the size of the capacitive slots. The article also provides valuable insights into the antenna's functionality and versatility, making it a valuable asset for dual-band wireless communication applications.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Duy-Thai Nguyen, Thanh-Hai Le, Van-Sang Doan, Van-Phuc Hoang
Summary: This paper proposes a method that combines UNet and rootMUSIC algorithm to improve the accuracy of DOA estimation. By converting the covariance matrix of received signals into an ideal antenna array's covariance matrix, and then using rootMUSIC algorithm for DOA estimation, the experimental simulation results show that this method can significantly reduce the error of DOA estimation compared with traditional methods.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Shafaq Kausar, A. U. Kausar, Muhammad Usman Hadi, Hani Mehrpouyan
Summary: This paper presents the design of a high gain multi-beam transmitarray antenna, which is capable of independently steering multiple beams in the azimuth and elevation plane. By using a passive meta-surface, the antenna achieves continuous beam steering by adjusting the phase of the unit cell transmission coefficient. The designed antenna is low cost, robust, and suitable for satellite communication and mm-Wave 5G systems.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
Article
Engineering, Electrical & Electronic
Jeong-Hun Park, Kyeong-Jun Lee, Seung-Jun Park, Moon-Que Lee
Summary: A new self-oscillating mixer (SOM) has been proposed in this paper, which includes a dielectric resonator (DR) antenna fed by a half-mode substrate integrated waveguide (HMSIW) on an FR4 epoxy substrate using hybrid integrated circuit technique. The high quality factor of the HMSIW resonator and the higher order HEM13 delta mode excitation of the DR radiator contribute to the excellent phase noise performance of the oscillator and the high directivity of the antenna, respectively. The phase noise, estimated LO power, and conversion gain are -102.5 dBc/Hz at 1 MHz offset, 8.74 dBm at an oscillation frequency of 24.15 GHz, and 8.5 dB, respectively. The figure-of-merit for the oscillator is -172.8 dBc/Hz.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2024)
