Article
Telecommunications
Akanksha Srivastava, Gurjit Kaur
Summary: The study proposes three spectrum sensing schemes, with the cooperation-based joint cooperation spectrum sensing (JCSS) scheme showing an increased sensing probability for vacant spectrum by 34%. These schemes are scalable in terms of energy harvesting and do not require sensing all spectrums, leading to a reduction in sensing time.
TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Jesus Perez, Javier Via, Luis Vielva, David Ramirez
Summary: This study focuses on centralized cooperative schemes based on the soft fusion of energy measurements at cognitive radios, and proposes a new algorithm that jointly estimates the instantaneous SNRs and detects the presence of primary signals to improve detection performance in mobile scenarios.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Telecommunications
Dimpal Janu, Kuldeep Singh, Sandeep Kumar
Summary: This paper surveys the application of machine learning algorithms in cooperative spectrum sensing and dynamic spectrum sharing in cognitive radio networks, focusing on feature extraction, algorithm types, and performance evaluation. It discusses the suitability of supervised, unsupervised, and reinforcement learning algorithms in the CSS domain, as well as reviews the application of ML algorithms in solving the DSS problem.
TRANSACTIONS ON EMERGING TELECOMMUNICATIONS TECHNOLOGIES
(2022)
Article
Engineering, Multidisciplinary
Srinivas Samala, Subhashree Mishra, Sudhansu Sekhar Singh
Summary: An improvement in spectrum usage can be achieved with the help of a cognitive radio network, where secondary users can access the unused licensed frequency band of primary users. Spectrum sensing is a crucial concept in cognitive radio networks, and cooperative spectrum sensing using machine learning has gained attention for enhancing sensing capability. In this study, the effectiveness of using K-means clustering for cooperative spectrum sensing in a generalized fading channel is analyzed, and the proposed strategy is compared to existing detection techniques.
JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Rajarshi Dutta, Saikat Chakrabarti, Ankush Sharma
Summary: This study proposes an M-estimator of scatter matrix for data-driven topology detection in Active Distribution Networks (ADNs) using bus voltage phase angle measurements available from Micro Phasor Measurement Units (mu PMUs). The proposed method is robust to bad measurements and non-Gaussian mu PMU noise.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Chemistry, Analytical
Chai-Sheng Wen, Chin-Feng Lin, Shun-Hsyung Chang
Summary: This study develops a passive acoustic monitoring system using empirical mode decomposition, energy characteristics analysis, and entropy of information theory to detect marine mammal vocalizations in complex marine environments. The proposed detection algorithm involves five main steps and four signal feature extraction and analysis algorithms. Experimental results show that the CESED detector outperforms the other three detectors in signal detection and achieves efficient sound detection of marine mammals.
Article
Telecommunications
Zitong Liu, Guoru Ding, Zheng Wang, Shilian Zheng, Jiachen Sun, Qihui Wu
Summary: Topology sensing plays a crucial role in understanding and predicting network behavior, especially in wireless networks with randomness and uncertainty. This article introduces a cooperative topology sensing framework using distributed sensors to cope with wireless randomness and formulate communication events among wireless transceivers as a multi-dimensional Hawkes process. The simulation results demonstrate that signal power and event number significantly affect sensing accuracy, highlighting the effectiveness of cooperative topology sensing in addressing wireless channel randomness.
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING
(2021)
Article
Engineering, Electrical & Electronic
Intikhab Hussain, Ke Wu
Summary: This article introduces and demonstrates a cooperative radar-communication system architecture using a multiport interferometer receiver for low-power and low-cost multifunction wireless applications. The system operates in both radar sensing and radio communication modes, arranged in different time slots within a single hardware platform. The proposed architecture benefits from the cooperative approach and enhances the signal quality through balanced detection scheme. The system performance has been established and evaluated through experiments, showing good capabilities in target finding and demodulation of digitally modulated signals.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Vanessa Mendes Renno, Jose Candido Silveira Santos Filho
Summary: In this study, a unified simulation method is proposed for α-μ, η-μ, and κ-μ fading models. The method can accommodate full-range values of all fading parameters and accurately match the first-order statistics while approximating the second-order statistics well. Analytical expressions and optimized simulation parameters are derived to improve the match for the second-order statistics. Useful series representations and asymptotic expressions for essential first- and second-order statistics are obtained. The results are fully validated through Monte Carlo simulation.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Optics
Pengxiang Liu, Liyuan Guo, Feng Qi, Weifan Li, Wei Li, Qiaoqiao Fu, Jiyong Yao, Mingjun Xia, Zhaoyang Liu, Yelong Wang
Summary: This paper reports an experimental study on the indirect upconversion detection of 3-8 μm mid-infrared (MIR) using a 1 μm laser-pumped BaGa4Se7 crystal. The detection scheme, integrated with an optical parametric oscillator and an optical receiver, offers high temporal and spectral resolution. The characteristics of this detection scheme, including wide response band and large dynamic range, make it superior to commercial detectors and suitable for high-resolution gas analysis and spectral imaging applications.
Article
Computer Science, Information Systems
Srinivas Nallagonda, Abhijit Bhowmick, Binod Prasad
Summary: This paper introduces a novel cooperative spectrum sensing network with improved energy detector for cognitive radio users, utilizing multiple antennas and selection combining for sensing and data transmission. Performance comparisons, analytical frameworks, and simulation results demonstrate the overall performance advantages in different fading channels and the significant impact of diversity on performance improvement.
Article
Environmental Sciences
Eric Chraibi, Haley Arnold, Sandra Luque, Amy Deacon, Anne E. Magurran, Jean-Baptiste Feret
Summary: Monitoring biodiversity on a global scale is challenging, with field assessments being costly and limited to small spatial scales. This study explored the use of remote sensing to assess tree biodiversity changes in cacao agroforests and primary forests, highlighting the potential of remote sensing to detect compositional changes in forests and expand on field data for better understanding landscape-level patterns of forest diversity.
Article
Medicine, General & Internal
Carlos Rocha-de-Lossada, Jose-Maria Sanchez-Gonzalez, Davide Borroni, Victor Llorens-Belles, Rahul Rachwani-Anil, Josep Torras-Sanvicens, Vito Romano, Jorge Peraza-Nieves
Summary: In patients with Fuchs endothelial corneal dystrophy (FECD) undergoing Descemet membrane endothelial keratoplasty (DMEK), chord mu length decreased significantly within the first three months postoperatively and remained stable after 12 months, while chord alpha length remained stable throughout the 12-month follow-up period.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Engineering, Multidisciplinary
Dragana Krstic, Nenad Petrovic, Issam Al-Azzoni
Summary: This paper proposes a model-driven framework for proactive network planning using deep learning and multiobjective optimization. The framework takes into account service demand, energy consumption, and degradation effects, and treats the optimization task as a component allocation problem. The goal is to find the best base station allocation that maximizes Quality of Service while minimizing costs and energy consumption.
MATHEMATICAL PROBLEMS IN ENGINEERING
(2022)
Article
Telecommunications
Rania A. Mokhtar, Rashid A. Saeed, Hesham Alhumyani
Summary: This paper proposes a distributed architecture to improve the spectrum sensing performance of cognitive radio systems. By using cooperative sensing and dynamic threshold, the sensing efficiency and reliability are significantly improved, and reporting errors are reduced.
WIRELESS PERSONAL COMMUNICATIONS
(2022)
