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16th IEEE Malaysia International Conference on Communication, MICC 2023

作者： Khan, Sher Dali Abbasi, Muhammad Inam Ibrahim, Imran Mohd Sohu, Izhar Ahmed Khan, Sanaullah Faculty of Electrical and Electronic Engineering Technology Malaysia Faculty of Electronic and Computer Engineering Malaysia

ISBN: (纸本)9798350304343

The future compliance of reflectarray antenna necessitates a methodical examination of its primary traditional configurations to anticipate improvements. The current design, which utilizes microwave and millimeter wave frequencies, serves as a fundamental foundation for further investigation. This study offers a comparison and characterization of various dielectric substrates employed in Sub-6 GHz and millimeter wave reflectarray antenna, based on unit cells designed at 3.5 GHz and 28 GHz. The analysis utilizes a range of commercially accessible dielectric materials characterized by dielectric permittivity $({{\varepsilon _r}})$ values spanning 2 to 3.6 and loss tangent (tan) values ranging from 0.0009 to 0.001. The performance of different dielectric materials in the design of infinite reflectarray is assessed in terms of bandwidth and reflection loss, providing a comprehensive comparison. It is observed that the bandwidth of patch element unit cells at different levels exhibits significant variations depending on the material properties, with a 10% bandwidth range. Furthermore, it is illustrated that the reflectarray antenna's reflection loss can be deconstructed into dielectric and conductor losses, both contingent upon the material properties utilized in the design. This article presents a comparison of eleven distinct substrate materials that have the potential to result in disruptive designs for both the architecture and components, thereby impacting the performance of the reflectarray antenna. © 2023 IEEE.

关键词： Bandwidth

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High-Throughput Independent Component Analysis Processor for Full Duplex Systems

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IEEE Journal on Selected Areas in Communications 2023年第9期41卷 2821-2832页

作者： Cheng, Jen-Hao Chang, Tien-Min Shen, Chung-An Fouda, Mohammed E. Eltawil, Ahmed M. National Taiwan University of Science and Technology Department of Electronic and Computer Engineering Taipei10607 Taiwan University of California at Irvine Electrical Engineering and Computer Science Department IrvineCA92697 United States King Abdullah University of Science and Technology Electrical and Computer Engineering Program Thuwal23955 Saudi Arabia

This paper presents the algorithm and very-large-scale integration (VLSI) architecture of a high-throughput and highly efficient independent component analysis (ICA) processor for self-interference cancellation (SIC) in in-band full-duplex (IBFD) systems. This is the first VLSI architecture reported in the literature based on the state-of-the-art entropy bound minimization (EBM) approach. A novel ICA algorithm is presented in this paper with momentum gradient descent optimization. Simulation results show that the number of iterations for the proposed algorithm is significantly reduced compared to the conventional ICA algorithms. Furthermore, a novel early-distribution estimation scheme is proposed in the designed ICA processor to compute multiple distribution functions with low latency and low complexity. The processing flow and the efficiency for the hardware utilization are specifically designed so that the processing speed is maximized with minimum employment of hardware components. The proposed ICA processor is designed and implemented based on the application-specific-integrated circuit (ASIC) flow. The post-layout estimations show that compared with the conventional EBM-based scheme, the proposed design improves the throughput and efficiency by 30x. In addition, compared to prior designs shown in the literature, the proposed ICA processor also demonstrates a significant enhancement in terms of throughput and efficiency. © 1983-2012 IEEE.

关键词： VLSI circuits

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A Comb-shaped Corrugated Antipodal Vivaldi Antenna with a Parasitic Patch for UWB Application 3

A Comb-shaped Corrugated Antipodal Vivaldi Antenna with a Pa...

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3rd International Conference on Advancement in electrical and Electronic engineering, ICAEEE 2024

作者： Razib, Mohammad Rahman Das, Debprosad Murshed, Abu Hena Istiaque, Arif Hossain, Md. Azad Chittagong University of Engineering & Technology Department of Electronics and Telecommunication Engineering Bangladesh The University of Texas at Dallas Department of Electrical and Computer Engineering United States

ISBN: (纸本)9798350388282

This paper presents a performance comparison of a comb-shaped Vivaldi antenna for ultrawideband (UWB) applications, which is antipodal in nature. The antenna utilizes a 50 Ω microstrip feed line for energizing the antenna. To achieve ultrawide-band behavior, a parasitic elliptical-shaped patch and corrugated slots are employed. The patch controls frequency shifting along with high-gain behavior via electromagnetic coupling. To validate the proposed antenna, Rogers RT5880 substrate is used ( =2.2., tan .δ=0.0009). The proposed antenna operates in a frequency range from 5 to 28 G H z , with the highest gain of 12.5dBi at 27.5GHz. It has a total radiation efficiency of 97\% at 21.25GHz. The proposed Vivaldi antenna is a suitable candidate for high-gain wireless applications. The CST Studio Suite is employed to extract the simulation results of the antenna. © 2024 IEEE.

关键词： Microstrip antennas

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Net Load Prediction Using Machine Learning Methods: A Case Study of Residential Households 3

Net Load Prediction Using Machine Learning Methods: A Case S...

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3rd International Conference on Energy Transition in the Mediterranean Area, SyNERGY MED 2024

作者： Herodotou, Panagiotis Tziolis, Georgios Makrides, George Georghiou, George E. PV Technology Laboratory Department of Electrical and Computer Engineering Cyprus for Intelligent Nicosia Cyprus

ISBN: (纸本)9798350375923

As residential solar photovoltaic (PV) systems are increasingly integrated into distribution networks globally, there is a growing necessity to shift from traditional load forecasting to net load forecasting (i.e., predicting the combination of PV and load collectively). Understanding and predicting the daily net energy of a typical household is crucial for designing and sizing appropriate renewable energy systems and storage solutions. This paper compares the performance of different machine learning methods in predicting the net load patterns of a typical household. The database contained PV production and energy load records from 68 actual households in Cyprus, over a period of one year. The results showed that the eXtreme Gradient Boosting (XGBoost) model outperformed all other models yielding a normalized root mean square error of 5.52%. Despite the inherent unpredictability of net load patterns, the findings indicate that the proposed XGBoost model can achieve high prediction accuracies for household electricity net load profiles. © 2024 IEEE.

关键词： Prediction models

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Disparate Scenarios for Reduction of Voltage and Current Sensors in Nested Neutral Point Clamped (NNPC) Converter 16

Disparate Scenarios for Reduction of Voltage and Current Sen...

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16th Annual Power Electronics, Drive Systems, and Technologies Conference, PEDSTC 2025

作者： Bagheri Hashkavayi, M. Masoud Barakati, S. Saeid Mohtavipour, S. Sadafi, Mojtaba Darmian, Saeed Yousofi University of Sistan and Baluchestan Department of Electrical and Computer Engineering Zahedan Iran University of Guilan Department of Electrical and Computer Engineering Rasht Iran Esfarayen University of Technology Department of Electrical and Computer Engineering Esfarayen Iran Regional Electric Co. of Sistan and Baluchestan Department of Research and Planning Zahedan Iran

ISBN: (纸本)9798331533946

The Nested Neutral Point Clamped (NNPC) converter, functioning as a voltage source Converter (VSC), provides an effective solution for applications requiring Medium-Voltage and High-Power (MVHP). Earlier implementations of this converter typically required many sensors to maintain capacitor voltages equally in all series Half-Bridge Sub-Modules (HB-SMs). This research introduces two methodologies to minimize sensor requirements for computing capacitor voltages using novel algorithms based on estimation methods. These strategies simplify the converter control procedure by eliminating individual current and voltage sensors specified for HB-SMs. The proposed approaches ensure precise voltage balance with minimal estimation error by continuously adjusting capacitor voltages using estimated values from previous iterations and switching signals. Extensive MATLAB Simulink tests verify the effectiveness of these techniques across diverse practical scenarios. The results highlight significant simplification of sensor complexity while maintaining strong performance in NNPC Converter applications, emphasizing the importance of sensor implementation in the cost and operational effectiveness of VSCs. © 2025 IEEE.

关键词： Capacitor bank

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A Relay-Assisted Ground to LEO and LEO to GEO Inter-Satellite Optical Wireless Communication Link 4

A Relay-Assisted Ground to LEO and LEO to GEO Inter-Satellit...

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4th IEEE International Conference on electrical, computer, and Energy Technologies, ICECET 2024

作者： Faria Ahmad, Arsalan Ghafoor, Salman School of Electrical Engineering and Computer Science National University of Sciences and Technology Islamabad Pakistan

ISBN: (纸本)9798350395914

Inter-satellite optical wireless communication (IsOWC) links are expected to be commonly used for future generation networks for transferring data through low earth orbit (LEO) satellite and geostationary earth orbit (GEO) satellite. In this work, we created a link from ground station to LEO satellite at a range of 2000 km and an IsOWC link between LEO and GEO satellite at a distance of 40,000 km based on a regenerative relay. The LEO satellite works as the relay between ground station and the GEO satellite. In comparison to conventional amplifier-based relays, our proposed regenerator-based relay at LEO satellite proved to have lower intensity fluctuations on the optical signals. The designed regenerator is built on an EAM modulator and its performance is observed under various turbulent conditions such as low, medium and strong. In case of strong turbulence;the results showed a decrease of 3.5 dB in the received optical power compared to the conventional amplifier-based relay. © 2024 IEEE.

关键词： Geostationary satellites

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Portable Edge Computing System Analysis for Real-Time Detection and Classification of Wheat Yellow Rust Infection Types Using Embedded AI

Portable Edge Computing System Analysis for Real-Time Detect...

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2024 International Conference on engineering and Computing, ICECT 2024

作者： Khalid, Hassan School of Electrical Engineering and Computer Science National University of Science and Technology Islamabad Pakistan

ISBN: (纸本)9798350349719

Wheat rust diseases, notably yellow rust, pose a substantial threat to global food security by adversely impacting crop yields. The timely and precise detection of these diseases is imperative for implementing effective management strategies. This research paper delves into the challenges associated with categorizing wheat yellow-rust infection types and critically reviews existing approaches within the domain. The primary focus is on embedded AI solutions, digital image processing techniques, and deep learning methodologies aimed at achieving accurate and early detection of wheat rust diseases. In addition, the paper aligns with Sustainability Development Goals (SDGs) by contributing to global efforts in ensuring food security, as the proposed integrated AI approach addresses identified issues, fostering a sustainable and resilient agricultural ecosystem. © 2024 IEEE.

关键词： Deep learning

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Maximizing Profit of the Service Providers through Efficient Content Placement and Retrieval in an IoT-enabled Edge-Cloud Platform 18

Maximizing Profit of the Service Providers through Efficient...

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18th IEEE International Conference on Advanced Networks and Telecommunications Systems, ANTS 2024

作者： Gandhi, Preet Mahanta, Abhishriya Ghose, Manojit Sahu, Aryabartta Indian Institute of Technology Department of Computer Science and Engineering Guwahati India Indian Institute of Technology School of Computing and Electrical Engineering Mandi India Indian Institute of Information Technology Department of Computer Science and Engineering Guwahati India

ISBN: (纸本)9798350391725

In today's 5G era, the amount of data generated by the Internet of Things (IoT) devices is enormous. Data is processed and stored in the cloud under a traditional cloud computing architecture, and real-time processing and retrieval of these data is time-consuming. Therefore, an edge-cloud framework comes in handy where the content generated is placed on the edge nodes of the network, and it can reach the endusers in a time-bound manner. A majority of the previous research works on content placement under the edge-cloud architecture primarily aimed at improving the latency of the system. However, the approach proposed in this paper aims to maximize the profit of the service provider by effectively placing the content in a hierarchically organized edge-cloud network. We propose two strategies and compare them with random and greedy approaches for both synthetic and real data sets. The experimental results demonstrate the effectiveness of the proposed strategies, and the profit of the service providers increases by 38.81% (maximum) and 10.51% (on average) for the synthetic dataset and by 65.74% (maximum) and 22.83% (on average) for the real-world dataset when compared with the greedy approach. © 2024 IEEE.

关键词： Cloud platforms

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WIP: Relatable Rebound Story Project: Transforming How Students View and Overcome Setbacks 54

WIP: Relatable Rebound Story Project: Transforming How Stude...

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54th IEEE Frontiers in Education Conference, FIE 2024

作者： Wills, Linda M. Collins, Thomas R. Wolfe, Jennifer De Ocampo, James S. Lee, Ted S. Ting, Aric J. School of Electrical and Computer Engineering Georgia Institute of Technology AtlantaGA United States

ISBN: (纸本)9798350351507

This innovative practice WIP paper presents a pilot study of an educational intervention designed to transform the way students view and overcome struggles that are a normal-and essential-part of the learning process. The intervention involves sharing 'relatable rebound stories' from previous students, each describing a setback or challenge encountered and the specific agentic strategies used to resolve it. Preliminary results are presented from a pilot study conducted in an entry-level computer engineering course of 168 students that requires time management and project-based learning. This study shows the positive impact of this intervention on quantitative sense of belonging and selfefficacy scales and confidence in skills related to computing, systems prototyping, and problem-solving. © 2024 IEEE.

关键词： Students

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Active Control for Resonance Mitigation in Electric Drive Applications 15

Active Control for Resonance Mitigation in Electric Drive Ap...

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15th International Symposium on Industrial Electronics and Applications, INDEL 2024

作者： Berglund, Emelie Borg, Johan Johansson, Jonny Luleå University of Technology Dept. of Computer Science Electrical and Space Engineering Sweden

ISBN: (纸本)9798350352320

The use of inverter-based motor controllers that can generate fast voltage level transitions is increasing in the field of electric drive systems because of their ability to achieve higher efficiency. However, the fast voltage transitions, dv/dt's, are prone to generate bearing currents and cause overvoltages that may harm the electric motor. An LC filter applied between the inverter and the motor terminals can reduce the dv/dt's. However, the LC filter will cause overvoltage due to resonance but this can be overcome by introducing an extra pulse at each pulse-width modulation (PWM) transition. The timing of this extra pulse is crucial for suppressing the resonance, but due to nonlinearities in a real system, the time instants may vary over time and are thus in need of control. In this study, an analytical expression for the optimal pulse location and duration is derived and we propose a control algorithm that continuously calculates the optimal pulse switch time instants based on the measured output voltage. The control algorithm can handle sudden system disturbances and a Monte Carlo simulation is performed to evaluate the performance of the algorithm. This hybrid filter successfully reduces dv/dt's at the motor terminals while simultaneously eliminating overvoltages due to the filter resonance. © 2024 IEEE.

关键词： Control nonlinearities

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