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International Conference on Modern Circuits and Systems Technologies (MOCAST)

作者： V. Samaras K. Tatas A. Lontos Department of Electrical Engineering Computer Engineering and Informatics Frederick University Nicosia Cyprus Department of Mechanical Engineering Frederick University Nicosia Cyprus

This paper presents the development of proof of concept for a low-cost, real-time Cyber Physical System (CPS)/IoT that deals with observed excess braking issues in Formula Student (FS) race cars. The goal is to utilize telemetry aspects through a smart monitoring system under the FS low budget competition restrictions, with low-cost materials, open-source software, Long Range wireless communication (LoRa) and cloud services. The paper also introduces an algorithm for implementing an adaptive sampling rate based on the proximity of monitored parameters to warning levels to minimize unnecessary data transmission. The system prototype was tested under realistic driving conditions, obtaining useful preliminary data that can be used to guide both driving behavior and future vehicle design. The results demonstrate that the proposed approach can be useful for the race team in FS conditions and may be possible to expand it to other similar driving scenarios outside FS.

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The Effect of Parasitic Elements on EMI Common Mode Filter Insertion Loss

The Effect of Parasitic Elements on EMI Common Mode Filter I...

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IEEE Conference on Industrial electronics and Applications (ICIEA)

作者： Pin-Tzu Chiu M.H. Pong Chun-Jen Yao Huang-Jen Chiu Department of Electronic and Computer Engineering National Taiwan University of Science and Technology Taipei Taiwan

ISBN: (数字)9798350360868

ISBN: (纸本)9798350360875

The common mode filter is a commonly used to suppress common mode noise. The parasitic elements within the filter components significantly impact its performance. It is highly valuable to illustrate the effect of these parasitic elements on the insertion loss of the common mode filter. This work proposes an illustration of the effects of filter parasitic element and a design procedure aimed at determining the corner frequencies in the insertion loss characteristic. The required inductance and capacitance necessary are calculated to achieve the design attenuation at the specified frequencies. Parasitic elements are also accounted for through impedance characteristic calculation. Circuit simulation is employed to compute the noise spectrum with filter, which is then validated through experiment verification. This study identifies the four corner frequencies on the insertion loss with non-ideal LC filter model. Through this design procedure, the simulation results closely match the actual EMI measurement.

关键词： Matched filters Noise Electromagnetic interference Multichip modules Transfer functions Insertion loss Loss measurement

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Determination of Admissible Power and Digital Filtering Algorithm Development of Discretely Regulated Autonomous Induction Generators 4

Determination of Admissible Power and Digital Filtering Algo...

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4th IEEE KhPI Week on Advanced Technology, KhPI Week 2023

作者： Shurub, Yuriy Morozov-Leonov, Oleksandr Department of Electromechanical Systems Institute of Electrodynamics of the National Academy of Sciences of Ukraine Kiev Ukraine Department of Informatics and Computer Engineering National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" Kiev Ukraine

ISBN: (纸本)9798350395532

Autonomous induction generators have such advantages as simplicity of design and high reliability. For a number of generators based on general industrial induction motors, their admissible capacities were determined according to the criterion of permissible thermal load of the stator winding. A digital filtering algorithm was developed for discrete adjustment of the capacitance of the excitation system under the conditions of stochastic load, which allows to avoid rattling of contacts at switching points. © 2023 IEEE.

关键词： Induction motors

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An Improved Doppler Radar Imaging Model for Retrieving Ocean Current Velocity from SAR Image under DCA Framework

An Improved Doppler Radar Imaging Model for Retrieving Ocean...

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2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Du, Yanlei Yin, Junjun Yang, Jian Chinese Academy of Sciences National Key Laboratory of Microwave Imaging Technology Aerospace Information Research Institute Beijing100101 China University of Science and Technology Beijing School of Computer and Communication Engineering Beijing100083 China Tsinghua University Department of Electronic Engineering Beijing100084 China

ISBN: (纸本)9798350375909

In this paper, an improved Doppler radar imaging model (IDopRIM) is proposed by considering all three radar imaging modulation transfer functions and implementing a modified hydrodynamic model. The proposed model is validated by comparing to the measurements and the widely-used empirical model. It is indicated that the IDopRIM effectively addresses the overestimation issue of the original DopRIM model and presents a significant accuracy improvement. For most conditions, the root mean square (RMS) errors of the proposed model are within 0.3 m/s. © 2024 IEEE.

关键词： Radar imaging

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Potentials of radar sensor detecting the presence of an imitated user for optimising short-range presence-sensing lighting in homes

Potentials of radar sensor detecting the presence of an imit...

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2023 International Conference on the Built Environment in Transition, CISBAT 2023

作者： Sithravel, RatnaKala Landré, Jérôme Hurtig-Wennlöf, Anita Aries, Myriam Department of Construction Engineering and Lighting Science School of Engineering Jönköping University Jönköping Sweden Department of Computer Science and Informatics School of Engineering Jönköping University Jönköping Sweden Department of Natural Science and Biomedicine School of Health and Welfare Jönköping University Jönköping Sweden

Current presence-sensing technologies for energy-efficient lighting control and building optimisation are (i) catered to commercial and institutional environments, and (ii) focused on lamp technology and occupancy detection. They often ignore user behaviour characteristics, which significantly influence energy consumption. Therefore, this study aims to identify alternative sensing techniques as part of a lighting control system that can energy-efficiently support user's behavioural needs in mixed-function residential spaces. An exploratory study investigated the optimal placement of a non-wearable radar sensor to detect an imitated user's breathing frequency at varying pre-set horizontal distance positions, and the sensor's performance was validated with a spirometer. The procedure measured a balloon's radar-detected distance, radar-detected breathing frequency, and spirometer-registered breathing frequency at each pre-set position. The radar sensor detected all simulated breathing frequencies with almost 100% data accuracy but was not comparable in detecting all distances. The radar offers a less intrusive short-range presence-sensing for homes, accurately detecting breathing frequencies in a contactless way between 0.2m to 0.8m. Further investigations are recommended to develop radar sensing that could predict lighting options based on user's objective feedback. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Energy utilization

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Fast Mapping of Flexibility Regions at TSO-DSO Interfaces under Uncertainty

Fast Mapping of Flexibility Regions at TSO-DSO Interfaces un...

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2022 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2022

作者： Patig, Alice Stanojev, Ognjen Aristidou, Petros Kiprakis, Aristides Hug, Gabriela Eth Eeh - Power Systems Laboratory Zurich Switzerland University of Edinburgh School of Engineering Institute for Energy Systems United Kingdom Cyprus University of Technology Computer Engineering and Informatics Department of Electrical Engineering Cyprus

ISBN: (数字)9781665480321

ISBN: (纸本)9781665480321

The gradual decommissioning of fossil fuel-driven power plants, that traditionally provide most operational flexibility in power systems, has led to more frequent grid stability issues. To compensate for the lack of flexible resources, Distributed Energy Resources (DERs) in distribution networks can be employed. To facilitate the use of DERs, the aggregated flexibility in a distribution grid is commonly represented on a PQ-plane displaying the feasible active and reactive power exchange with the upstream grid. This paper proposes a fast feasible operating region mapping mechanism that utilizes a linear power flow approximation in combination with linearized generator, current, and voltage constraints to construct a high-dimensional polyhedral feasible set of DER power injections. The obtained polytope is projected onto the PQ-plane using Fourier-Motzkin Elimination to represent the aggregate network flexibility. Additionally, uncertainty in DER generation is addressed using chance-constraints. Our analysis of a modified 33-bus IEEE test system demonstrates that the proposed method obtains more accurate approximations than former geometric methods and is ten times faster than the tested optimization-based method. © 2022 IEEE.

关键词： Electric power distribution

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Performance Evaluation of Fully Generalized Spatial Modulation with Hybrid Beamforming in Vehicular Networks: MmWave vs. IEEE 802.11ad 7

Performance Evaluation of Fully Generalized Spatial Modulati...

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7th IEEE International Symposium on Telecommunication Technologies, ISTT 2024

作者： Mohamed Hashim, Sheemaa Ali Dziyauddin, Rudzidatul Akmam Bin Mohd Izhar, Mohd Azri Seman, Norhudah Rahim, Sharul Kamal Abd. Chatzimisios, Periklis Universiti Teknologi Malaysia Faculty of Artificial Intelligence Kuala Lumpur Malaysia King Khalid University Applied College in Khamis Mushait Computer Science Department Abha Saudi Arabia Universiti Teknologi Malaysia Faculty of Electrical Engineering Johor Malaysia International Hellenic University Department of Information and Electronic Engineering Thermi Greece

ISBN: (纸本)9798350392074

The increasing need for high data rates in vehicular networks necessitates the development of innovative technologies to improve spectral efficiency (SE) and guarantee the reliability of cellular connections. An innovative approach that uses an integration of Fully Generalized Spatial Modulation (FGSM) with hybrid beamforming (H-FGSM) to improve vehicular communication, exhibiting notable enhancements in SE. This paper explores the utilization of FGSM in conjunction with hybrid beamforming within vehicular communication systems, specifically emphasizing two predominant frameworks: millimeter-wave (mmWave) and IEEE 802.11ad. It employs a complete performance analysis to investigate the effects of H-FGSM on the aforementioned communication frameworks. It is worth mentioning that the mmWave framework has a superior SE of 7bps/Hz in comparison to IEEE 802.11ad, in addition to extended coherence time by 3 times and decreased frequency of adjustments to channel state information (CSI). These characteristics render mmWave very suitable for dynamic vehicular environments that require reliable communication routes. Consequently, the integration of FGSM with hybrid beamforming presents a potentially viable approach for addressing the requirements of advanced intelligent transportation systems in future vehicle networks, which leads to the foundation for future investigations aim at enhancing the efficiency of mmWave communication systems in dynamic vehicular situations. © 2024 IEEE.

关键词： Vehicular ad hoc networks

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Maximizing Key Distribution Capability: An Application in Quantum Cryptography 4

Maximizing Key Distribution Capability: An Application in Qu...

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4th IEEE International Conference on Quantum Computing and engineering, QCE 2023

作者： Nguyen, Tu N. Nguyen, Dung H. P. Nguyen, Manh V. Le, Thinh V. Liu, Bing-Hong Dinh, Thang N. Kennesaw State University Department of Computer Science MariettaGA30060 United States National Kaohsiung University of Science and Technology Department of Electronic Engineering Kaohsiung Taiwan Virginia Commonwealth University Department of Computer Science VA23284 United States

ISBN: (纸本)9798350343236

Quantum key distribution (QKD) integrated wavelength-division multiplexing (WDM) offers an information-theoretically secure solution to the key exchange problem. In this paper, we investigate the joint problem of how to efficiently schedule QKD to provision sufficient secret keys over WDM networks. Specifically, we propose and formulate the problem of maximizing key distribution capability (MKDC) by employing a mixed integer linear programming (MILP) model for the first time. We then suggest two near-optimal algorithms adopted to address larger-scale problems in polynomial time. One employs the linear programming relaxation technique combined with a rounding algorithm (LPR-RA) and the other is inspired by the fact that the application with a higher risk of disruption is prioritized to recharge secret keys, dubbed progressive serving algorithm (PSA). Simulation results show that both the LPRRA and PSA can approach the best feasible solution or the upper-bound of the problem. In addition, by means of using NetSquid, an open simulator for quantum networks, we conduct experiments to get insight into the BB84, a protocol applied popularly in QKD networks nowadays. © 2023 IEEE.

关键词： Quantum cryptography

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Interference-Robust Broadband Rapidly-Varying MIMO Communications: A Knowledge-Data Dual Driven Framework

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IEEE Transactions on Wireless Communications 2025年

作者： Zhao, Jingjing Su, Jing Cai, Kaiquan Zhu, Yanbo Liu, Yuanwei Al-Dhahir, Naofal Beihang University Department of Electrical and Electronic Engineer Beijing China State Key Laboratory of CNS/ATM Beijing China Queen Mary University of London Department of Electronic Engineering and Computer Science London United Kingdom University of Texas at Dallas Department of Electrical and Computer Engineering Richardson United States

A novel time-efficient framework is proposed for improving the robustness of a broadband multiple-input multiple-output (MIMO) system against unknown interference under rapidly-varying channels. A mean-squared error (MSE) minimization problem is formulated by optimizing the beamformers employed. Since the unknown interference statistics are the premise for solving the formulated problem, an interference statistics tracking (IST) module is first designed. The IST module exploits both the time- and spatial-domain correlations of the interference-plus-noise (IPN) covariance for the future predictions with data training. Compared to the conventional signal-free space sampling approach, the IST module can realize zero-pilot and low-latency estimation. Subsequently, an interference-resistant hybrid beamforming (IR-HBF) module is presented, which incorporates both the prior knowledge of the theoretical optimization method as well as the data-fed training. Taking advantage of the interpretable network structure, the IR-HBF module enables the simplified mapping from the interference statistics to the beamforming weights. The simulations are executed in high-mobility scenarios, where the numerical results unveil that: 1) the proposed IST module attains promising prediction accuracy compared to the conventional counterparts under different snapshot sampling errors;and 2) the proposed IR-HBF module achieves lower MSE with significantly reduced computational complexity. © 2002-2012 IEEE.

关键词： Mean square error

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Performance Analysis of STAR-RIS-Assisted Cell-Free Massive MIMO Systems with Electromagnetic Interference and Phase Errors

arXiv

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arXiv 2024年

作者： Qian, Jun Murch, Ross Letaief, Khaled B. Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

—Simultaneous Transmitting and Reflecting Reconfigurable Intelligent Surfaces (STAR-RISs) are being explored for the next generation of sixth-generation (6G) networks. A promising configuration for their deployment is within cell-free massive multiple-input multiple-output (MIMO) systems. However, despite the advantages that STAR-RISs could bring, challenges such as electromagnetic interference (EMI) and phase errors may lead to significant performance degradation. In this paper, we investigate the impact of EMI and phase errors on STAR-RIS-assisted cell-free massive MIMO systems and propose techniques to mitigate these effects. We introduce a novel projected gradient descent (GD) algorithm for STAR-RIS coefficient matrix design by minimizing the local channel estimation normalised mean square error. We also derive the closed-form expressions of the uplink and downlink spectral efficiency (SE) to analyze system performance with EMI and phase errors, in which fractional power control methods are applied for performance improvement. The results reveal that the projected GD algorithm can effectively tackle EMI and phase errors to improve estimation accuracy and compensate for performance degradation with nearly 10% ∼ 20% SE improvement. Moreover, increasing access points (APs), antennas per AP, and STAR-RIS elements can also improve SE performance. Applying STAR-RIS in the proposed system achieves a larger 25%-likely SE than conventional RISs. However, the advantages of employing more STAR-RIS elements are reduced when EMI is severe. Copyright © 2024, The Authors. All rights reserved.

关键词： Mean square error

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