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4th International Conference on Electronic and electrical engineering and Intelligent System, ICE3IS 2024

作者： Shabira, Hanna Putri Natali, Yus Apriono, Catur Universitas Indonesia Department of Electrical Engineering Depok Indonesia Telkom University Telecommunication Engineering Program Jakarta Indonesia

ISBN: (纸本)9798350378368

This research study uses a radio over fiber at 28 GHz for a 5G fronthaul design that uses a single channel without and with amplification. For a 20 km distance, the downstream Q factor has not yet met the standard at 3.37, while upstream, it has increased to 10.76. The results show that the power received increases when an amplifier is used, but the Q factor and BER are not significantly improved. It shows that in this scheme, the dispersion factor is more dominant in influencing data transmission than the power level. From the current results, some issues can be further researched, such as dispersion compensation to improve the data transmission quality and suppress unwanted harmonic frequencies. © 2024 IEEE.

关键词： Radio-over-fiber

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Jamming Attack Mitigation in Wireless Federated Learning Networks Using Bayesian Games

IEEE Networking Letters

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IEEE Networking Letters 2024年第4期6卷 247-251页

作者： Barkatsa, Sofia Diamanti, Maria Charatsaris, Panagiotis Tsiropoulou, Eirini Eleni Papavassiliou, Symeon Institute of Communication and Computer Systems School of Electrical and Computer Engineering National Technical University of Athens Zografou15780 Greece University of New Mexico Department of Electrical and Computer Engineering AlbuquerqueNM87131 United States

Federated Learning (FL), an emerging distributed Artificial Intelligence (AI) technique, is susceptible to jamming attacks during the wireless transmission of trained models. In this letter, we introduce a jamming attack mitigation mechanism for the uplink of wireless FL networks using the power-domain Non-Orthogonal Multiple Access (NOMA) technique. The problem of transmission power allocation for all clients (legitimate and malicious) is formulated and solved distributively as a Bayesian game with incomplete information. The clients aim to successfully transmit their model parameters, minimizing transmission time and consumed power, while having probabilistic knowledge about the malicious behavior of the other clients in the game. © 2019 IEEE.

关键词： Federated learning

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Performance Analysis of Curved Track G2T-FSO(Ground-to-Train Free Space Optical)Model under Various Weather Conditions

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Computer Modeling in engineering & Sciences 2024年第12期141卷 2087-2105页

作者： Mohammed A.Alhartomi Mohammad F.L.Abdullah Wafi A.B.Mabrouk Mohammed S.M.Gismalla Ahmed Alzahmi Saeed Alzahrani Mohammad R.Altimania Mohammed S.Alsawat Department of Electrical Engineering University of TabukTabuk71491Saudi Arabia Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia(UTHM)Johor86400Malaysia Center for Communication Systems and Sensing King Fahd University of Petroleum and Minerals(KFUPM)Dhahran31261Saudi Arabia Department of Mechanical Engineering University of TabukTabuk71491Saudi Arabia

The demand for broadband data services on high-speed trains is rapidly growing as more people commute between their homes and ***,current radio frequency(RF)technology cannot adequately meet this *** order to address the bandwidth constraint,a technique known as free space optics(FSO)has been *** paper presents a mathematical derivation and formulation of curve track G2T-FSO(Ground-to-train Free Space Optical)model,where the track radius characteristics is 2667 m,divergence angle track is 1.5°for train velocity at V=250 km/*** transmitter configurations are proposed to maximize coverage range and enhance curve track G2T-FSO link performance under varying weather *** curved track G2T-FSO model was evaluated in terms of received power,signal-to-noise ratio(SNR),bit error rate(BER),and eye *** results showed maximum coverage lengths of 618,505,365,and 240 m for 4Tx/1Rx,3Tx/1Rx,2Tx/1Rx,and 1Tx/1Rx configurations,*** analyzed results demonstrate that the G2T-FSO link can be effectively implemented under various weather conditions.

关键词： Free space optics curve track ground-to-train communications geometrical loss weather conditions

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Performance of Radio over Fiber from Radio to Millimeter-wave Spectrum for A Fronthaul Optical Network 13

Performance of Radio over Fiber from Radio to Millimeter-wav...

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13th IEEE International Conference on Communication, Networks and Satellite, COMNETSAT 2024

作者： Al Faruq, Syafiq Maulana Natali, Yus Apriono, Catur Universitas Indonesia Department of Electrical Engineering Depok Indonesia Telkom University Telecommunication Engineering Program Jakarta Indonesia

ISBN: (纸本)9798350368086

Radio over fiber (RoF) technology enables the transmission of radio signals over optical fiber, offering reliable and high-performance connectivity for front-haul applications. This is particularly beneficial in the context of 5G cellular networks, where there is a demand for robust and efficient front-haul connectivity to support the high data rates and low latency requirements of 5G applications and services. Using RoF, 5G cellular networks can achieve improved reliability, flexibility, and performance in their front-haul infrastructure. This research investigates the performance of a proposed RoF network for front-haul applications by considering the Q-factor parameter using OptiSystem. The findings from the study demonstrate that radio-over-fiber (RoF) technology is highly suitable for operating within the millimeter wave spectrum, specifically at frequencies as low as 10 GHz. As the frequency escalates to 40 GHz and beyond, the system's performance becomes saturated, yielding a Q factor of approximately 23 for upstream transmission and 19 for downstream transmission. It is important to note that careful consideration and strategic planning are vital for the effective and efficient implementation of RoF, especially when it comes to managing spectrum usage. © 2024 IEEE.

关键词： Radio-over-fiber

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Optical Link Design of 5G Triple-Band Radio over Fiber Using Wavelength Division Multiplexing Technique 25

Optical Link Design of 5G Triple-Band Radio over Fiber Using...

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25th International Seminar on Intelligent Technology and Its Applications, ISITIA 2024

作者： Al Faruq, Syafiq Maulana Natali, Yus Apriono, Catur University of Indonesia Department of Electrical Engineering Depok Indonesia Telkom University Telecommunication Engineering Program Jakarta Indonesia

ISBN: (纸本)9798350378573

The need for communication networks with high speed and capacity continues to increase along with the development of information and communication technology. 5G technology applied to Radio over Fiber accompanied by Wavelength Division Multiplexing can meet these needs. Fronthaul schemes were designed with radio frequencies of 0.7, 2.6 and 26 GHz. Simulations in the upstream and downstream schemes showed that channel 1 and channel 2 in the upstream scheme had reached the target with a BER value of less than 1e009 and a Q Factor of more than 6. In the downstream scheme, no channel reaches the target. © 2024 IEEE.

关键词： Radio-over-fiber

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A Deep Learning Approach for Brain Tumor Classification

A Deep Learning Approach for Brain Tumor Classification

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2024 International Conference on Computer and Applications, ICCA 2024

作者： Abdelmoniem, Aya Ebrahim, Gamal A. Abdellatif, Mohammad M. The British University in Egypt Faculty of Engineering Electrical Engineering Department Cairo Egypt Ain Shams University Faculty of Engineering Computer and Systems Engineering Department Cairo Egypt

ISBN: (纸本)9798350367560

The medical field is incredibly stressful for both specialists and patients, especially when dealing with life threatening cases. Brain tumor identification is one of the most challenging tasks even for experts in the field. Fortunately, the evolution of machine learning techniques and their flexibility to be integrated into many different fields, including tumor identification and classification has greatly simplified this task. For the physicians to accurately diagnose a patient, they must first have a lot of knowledge and years of experience in addition to going through many cases. Machine learning simplifies this process when it comes to learning and using this knowledge to decide without human intervention. If the data fed to the model is accurate, the decisions made will be more accurate. In this paper, an automated machine learning model is developed to identify brain tumors. Different datasets are utilized in the developed model. The accuracy achieved by the model lies between 60% and 70%. Another dataset is then used, and the model shows an accuracy of 99%, precision of 83%, F1 score of 77% and recall of 75%. © 2024 IEEE.

关键词： Federated learning

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Design of WDM Fiber-Free Space Optic for A Point to Point Communication 7

Design of WDM Fiber-Free Space Optic for A Point to Point Co...

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7th International Conference on Informatics and Computational Sciences, ICICoS 2024

作者： Indradjaya, Justin Natali, Yus Apriono, Catur Universitas Indonesia Department of Electrical Engineering Depok Indonesia Telkom University Telecommunication Engineering Program Jakarta Indonesia

ISBN: (纸本)9798350375886

Cities often face difficulties in developing optical technology infrastructure due to the dense existing infrastructures. In addition, there is an increasing demand for data transmission, which requires a better and more flexible telecommunications system design solution. This research proposes a hybrid design between fiber optics and free space optics (FSO) that utilizes 4 WDM channels (wave division multiplexing) to improve capacity. The performance of the proposed design is simulated using Optisystem, and the Q factor and BER parameters are used to evaluate the effectiveness of the design. Several scenarios are conducted, including fiber optic distance, FSO medium distance, and attenuation within the FSO medium. The system's results show positive output, with the best performance achieved at 7 km of fiber optic distance, 1500 m of medium FSO distance, and the least attenuation factor. The proposed design reaches a Q factor of up to 8.2 and a BER minimum of as low as 10-21. These results indicate that fiber optic distance, FSO medium distance, and attenuation in FSO medium are factors that affect system performance. In general, the proposed design is capable of performing as a wide-bandwidth-efficient system for point-to-point communication in cities. © 2024 IEEE.

关键词： Q factor measurement

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Single Channel Passive Optical Network with High Data Rate for Increasing Broadband Access Capacity

Single Channel Passive Optical Network with High Data Rate f...

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2024 International Conference on Information Technology Research and Innovation, ICITRI 2024

作者： Rayhan, Berlian Erlangga Natali, Yus Apriono, Catur Universitas Indonesia Department of Electrical Engineering Depok Indonesia Telecommunication Engineering Program Telkom University Jakarta Indonesia

ISBN: (纸本)9798350376210

Digital transformation requires significant high data rate transmission for broadband access, including optical fiber networks. Increasing the data rate is a technique to provide more capacity linearly;however, its major challenge is dispersion, which limits its capacity in shorter distances. This research proposed an optical network design with a bitrate observation of 16 Gbps and 12.5 Gbps, respectively, for downstream and upstream in a single-channel passive optical network by applying the dispersion compensation fiber (DCF) to compensate for the dispersion of a 1: 64 splitting ratio. The results show that the compensating component improves the Q factor, which means that the dispersion can be suppressed. Without using DCF, the maximum downstream distance to meet the target is 30 km with a Q-Factor of 6.07. With DCF, a downstream distance of 40 km is still feasible, as the Q-Factor at 40 km is 7.06. Meanwhile, the upstream system shows unreachable performance in the transmission. Different considerations on data rate, input power, and other factors may contribute to the upstream results. More investigations are necessary to provide an upstream performance that achieves the expected condition. © 2024 IEEE.

关键词： Q factor measurement

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Exploration of ZnO:SiC composite material for photovoltaic applications

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Interactions 2025年第1期246卷 1-10页

作者： Mosabbir, A.S.M. Sadek, M.S. Mahmood, Minhaz Sultan, Sakhr M. Alshammari, Fuhaid Alobaid, Mohammad Alghafis, Abdullah A. Ibrahim, Mohd Adib Sobayel, K. Bangi43600 Malaysia Department of Avionics Engineering Bangabandhu Sheikh Mujibur Rahman Aviation and Aerospace University Dhaka Bangladesh Dept. of Electrical Electronic and Systems Engineering Universiti Kebangsaan Malaysia Bangi43600 Malaysia Mechanical Engineering Department Engineering College University of Hail Hail2440 Saudi Arabia Department of Mechanical and Industrial Engineering College of Engineering Majmaah University Almajmaah11952 Saudi Arabia Department of Mechanical Engineering College of Engineering Qassim University Buraydah51431 Saudi Arabia

This study explores the development and characterization of zinc oxide—silicon carbide (ZnO-SiC) composite materials fabricated using RF magnetron sputtering, with a focus on their potential application as electron transport layers (ETL) in perovskite solar cell. The ZnO-SiC composites were prepared by varying the SiC sputtering power from 10 to 30W, and the resulting films were analyzed for their optical, electrical, and morphological properties. UV–Vis spectroscopy revealed that the bandgap of the films ranged between 3.3 eV and 3.8 eV, with high transmittance values, making them suitable for ETL applications. Hall effect measurements indicated that all films exhibited n-type conductivity with the highest carrier concentration observed at 20W SiC power. Additionally, AFM analysis showed that the surface roughness decreased with increasing SiC power, with Sample 2 (SiC at 15W) demonstrating the smoothest surface, which is advantageous for enhancing charge transfer efficiency in photovoltaic devices. The results suggest that ZnO-SiC composites, particularly those sputtered at moderate SiC power, hold promise as effective ETLs in perovskite solar cells. Future research should focus on optimizing sputtering parameters to further enhance the electrical properties and crystallinity of these materials. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.

关键词： Carrier concentration

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Study on Effects of Line Coding and Power Variations on the Uplink Scheme of 8-Channel WDM-FSO HAP for 5G Applications

Study on Effects of Line Coding and Power Variations on the ...

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2024 IEEE International Conference on Industry 4.0, Artificial Intelligence, and Communications Technology, IAICT 2024

作者： Suryono, Valerie Olive Natali, Yus Apriono, Catur Department of Electrical Engineering Universitas Indonesia Depok Indonesia Telecommunication Engineering Program Telkom University Jakarta Indonesia

ISBN: (纸本)9798350353464

This study discusses the Wavelength Division Multiplexing-based Free-Space Optics (WDM-FSO) communication system over HAPs for 5G applications. It aims to evaluate the potential of this system in meeting the need for reliable 5G connectivity. Through simulations using OptiSystem, the research explores the implementation of HAPs with a focus on uplink connectivity between ground stations and HAPs. The study examines the influence of line coding, transmission power, atmospheric conditions, and altitude on the Log-Bit Error Rate (Log-BER) and system quality factor (Q-Factor). The results show that RZ line coding is effective in altitude variations, while NRZ is better in weather variations. Power variations do not show significant changes in line coding. This research illustrates the potential of WDM-FSO technology on HAPs to support reliable wireless connectivity in the future. ©2024 IEEE.

关键词： Bit error rate

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