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Utilizing mean greedy algorithm using user grouping for chunk allocation in OFDMA systems with carrier aggregation

Utilizing mean greedy algorithm using user grouping for chun...

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International Conference on telecommunication Systems, Services, and Applications (TSSA)

作者： Arfianto Fahmi Rina Pudji Astuti Linda Meylani Vinsensius Sigit Widhi Prabowo Telecommunication Engineering Study Program Telkom University Bandung Indonesia

In this paper, utilizing user-order chunk allocation algorithm for OFDMA systems using carrier aggregation environment is proposed and evaluated. Chunk allocation algorithm is performed based on mean greedy algorithm which has low complexity. In order to adopt this algorithm to those system, all users are divided into a certain group in accordance with the number of available aggregated carriers. The simulation results are shown that the performance and time complexity of the proposed scheme is same with the system without user grouping. Therefore, the proposed scheme could be considered to realize in LTE-Advanced platform.

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RFI measurements at Bosscha observatory to prepare a new VGOS station

RFI measurements at Bosscha observatory to prepare a new VGO...

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2023 International Symposium From the Universe Back to Earth: Developing Astronomy to Meet Today's Natural Challenges

作者： Ramadhan, S. Hidayat, T. Suryana, J. Romadhoni, A. Kurniasari, M. Bosscha Observatory Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Indonesia Astronomy Study Program Faculty of Mathematics and Natural Sciences Institut Teknologi Bandung Indonesia Laboratory of Radio and Microwave Telecommunication School of Electronics and Informatics Engineering Institut Teknologi Bandung Indonesia

A new VGOS (VLBI Global Observing System) radio telescope will be constructed at Bosscha Observatory Lembang, West Java, in cooperation between Shanghai Astronomical Observatory (SHAO) and Institut Teknologi Bandung. One of the preparation steps is to conduct RFI (Radio Frequency Interference) measurements to obtain the RFI environment from the vicinity of the observatory. In this work, we report preliminary measurements of the RFIs that were done for several days in August and September 2023. Instruments used includes: A-INFOTM LB-20180 horn antenna, Wright TechnologiesTM low noise amplifier, and AaroniaTM Spectran V5 80200 OEM spectrum analyzer. The frequency range of 2.0 - 18.0 GHz is targeted referring to VGOS frequencies. Measurements in one day are carried out for about 24 hours in eight cardinal directions and two polarizations. The results and analysis are presented in spectral power flux density plots. © Published under licence by IOP Publishing Ltd.

关键词： Observatories

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Odd-even quantisation and cartesian delta-sigma (ΔΣ) Upconverters for Transmitter Design

Odd-even quantisation and cartesian delta-sigma (ΔΣ) Upcon...

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International Conference on Communication Systems

作者： Sirmayanti Sirmayanti Vandana Bassoo Horace King Mike Faulkner Telecommunication Engineering Study Program State Polytechnic of Ujung Pandang Indonesia School of Innovative Technologies and Engineering University of Technology Mauritius School of Engineering and Science Victoria University Melbourne Australia

This paper offers an alternative odd-quantisation approach scheme for Cartesian ΔΣ systems proposed for the all-digital upconversion of baseband modulation to radio frequency (RF). The developed Cartesian ΔΣ system with even-quantisation has a minimum pulsewidth of two clock periods. This leads to a potential coarse quantisation at low signal levels. We show that the noise problem can be reduced with a new odd-quantisation scheme which is based on pulses with an odd number of clock periods. In this paper, the minimum pulsewidth is reduced to one clock period. Other quantized amplitudes are obtained by incrementing the pulsewidth in steps of two clock periods, which maintains a constant phase reference. In both cases separate quantisers for amplitude and phase enable simple implementation. We show that both odd and even-quantisation schemes produce the same distortion products that increase with frequency offset. The odd-quantisation scheme, however, has improved SNR by approximately 2 dB.

关键词： Quantization OFDM Clocks Pulse width modulation Noise Harmonic analysis Wireless communication

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study of Radiation Pattern Response on Phase-Controlled Ku-Band 8×4 Array Antenna

Study of Radiation Pattern Response on Phase-Controlled Ku-B...

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International Conference on Radar, Antenna, Microwave, Electronics, and telecommunications (ICRAMET)

作者： Yohanes Galih Adhiyoga Tri Nur Arifin Ganjar Febriyani Pratiwi Erfiana Wahyuningsih Bagus Edy Sukoco Yaya Sulaeman Teguh Praludi Folin Oktafiani Yuyu Wahyu Research Center for Telecommunication National Research and Innovation Agency Bandung Indonesia Electrical Engineering Study Program Universitas Dian Nusantara Jakarta Barat Indonesia

ISBN: (数字)9798350389920

ISBN: (纸本)9798350389937

This paper presents the design, simulation, and parametric study of a phase-controlled Ku-Band $8 \times 4$ array antenna for satellite communication. The single element is a rectangular patch antenna fed directly by a $50-0 \mathrm{hm}$ coaxial feed optimized for operation at 12.5 GHz. In the array configuration, 32 elements are arranged linearly along the x and y axes to achieve a gain of 24 dBi. The proposed study focused on the effect of phase control along the x-axis and y-axis to steer the radiation pattern in azimuth and elevation, respectively. Simulations reveal that increasing the phase difference applied to the elements results in a more significant shift of the main beam direction but also increases the sidelobe level (SLL) and decreases the antenna gain. The study further demonstrates that the main beam direction does not increase linearly beyond a specific phase difference, and grating lobes become apparent when the phase difference exceeds 90 degrees. The number of array elements can be increased to achieve a broader range of main beam steering, and higher bit phase shifters can provide finer phase resolution. The findings of this study offer valuable insights for optimizing phase-controlled beam steering in array antennas, balancing performance trade-offs, and enhancing the flexibility and effectiveness of the beam steering mechanism.

关键词： Phased arrays Satellite antennas Beam steering Azimuth Antenna theory Spaceborne radar Radar antennas Ku-band Microwave antenna arrays Antenna radiation patterns

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ΣΔ modulator for digital wireless architecture: A review

ΣΔ modulator for digital wireless architecture: A review

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Makassar International Conference on Electrical engineering and Informatics (MICEEI)

作者： Sirmayanti Sirmayanti Mike Faulkner Victoria University School of Engineering and Science Melbourne Victoria Australia Telecommunication Study Program The State Polytechnic of Ujung Pandang Makassar Sulawesi Selatan Indonesia

This paper studies Sigma-Delta (ΣΔ) technique to embed a complex modulation scheme such as orthogonal frequency division multiplexing (OFDM) into a single `on'-`off' bit stream operating at the carrier frequency. The amplitude of the signal is related to the pulse widths and the phase to the pulse position. This paper concentrates on all digital up-converter structures of ΣΔ modulator architecture. The binary nature of their output removes the need for analog components in the up-conversion chain. Their outputs can be used directly to drive the switch mode power amplifier (SMPA) for high efficiency operation.

关键词： Radio frequency Clocks Band-pass filters Switches Frequency modulation Encoding

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OFDM performance with odd-even quantisation in Cartesian ΔΣ upconverters

OFDM performance with odd-even quantisation in Cartesian Δ...

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International Conference on Signal Processing and Communication Systems, ICSPCS

作者： Sirmayanti Sirmayanti Vandana Bassoo Horace King Mike Faulkner School of Engineering and Science Victoria University Melbourne Australia Telecommunication Engineering Study Program State Polytechnic of Ujung Pandang Indonesia School of Innovative Technologies and Engineering University of Technology Mauritius Mauritius

This paper studies the odd-quantisation technique when subjected to OFDM input signals in a Cartesian Delta Sigma (ΔΣ) upconverter. The results will be compared to the even-quantisation method of [9] to establish whether there is an improvement in performance. The overall performance of the odd-quantisation scheme has about 5dB reduced adjacent channel power (ACP) compared to the even-quantisation scheme. The smaller first quantisation step results in lower quantisation noise for small signals, leading to a lower noise floor. When the signal is frequency offset, a number of distortions become visible in the spectrum. The third harmonic is the biggest distortion contributor followed by the image. Interestingly, the overall better noise performance of the odd-quantisation scheme does not improve the distortion spectra. Best performance occurs when frequency offsetting is avoided.

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Mapping the Literature of Artificial Intelligence in Medical Education: A Scientometric Analysis 7th

Mapping the Literature of Artificial Intelligence in Medical...

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7th International Conference on Inventive Communication and Computaional Technologies, ICICCT 2023

作者： Maulana, Fairuz Iqbal Zaın, Muhammad Yasır Lestari, Dian Purnomo, Agung Adi, Puput Dani Prasetyo Computer Science Department Bina Nusantara University Jakarta11480 Indonesia Informatics Engineering Study Program University of Madura Pamekasan Indonesia Faculty of Medicine Universitas Airlangga Surabaya60132 Indonesia Entrepreneurship Department BINUS Business School Undergraduate Program Bina Nusantara University Jakarta Jakarta11480 Indonesia Telecommunication Research Center National Research and Innovation Agency Jakarta11480 Indonesia

ISBN: (纸本)9789819951659

This study aims to investigate the use of artificial intelligence in health education in the last ten years from 2012 to 2022 using the Scopus database. Researchers use bibliometric analysis combined with the quantification method of Vosviewer and Rstudio software used for literature analysis. The results of the article that were flushed showed data such as the year of publication, journal, country, keywords, and authors, to the highest number of citations. The general keywords used by researchers are artificial intelligence, medical, and education. Researchers limit findings through keywords as in the last ten years and English only so that 1681 articles were obtained. According to the study's findings, McGill University affiliation had the greatest number of papers, with 69 pieces, and medicine had a proportion of 39.7% (n = 1067). This bibliometric study will be useful for other researchers to examine the development of research on artificial intelligence in health education in the last ten years. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Medical education

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The Scientific Progress and Prospects of Artificial Intelligence for Cancer Detection: A Bibliometric Analysis 24

The Scientific Progress and Prospects of Artificial Intellig...

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24th International Seminar on Intelligent Technology and Its Applications, ISITIA 2023

作者： Maulana, Fairuz Iqbal Adi, Puput Dani Prasetyo Lestari, Dian Ariyanto, Sandy Vikki Purnomo, Agung Bina Nusantara University School of Computer Science Computer Science Department Jakarta11480 Indonesia National Research and Innovation Agency Telecommunication Research Center Jakarta11480 Indonesia Universitas Airlangga Faculty of Medicine Surabaya60132 Indonesia University of Madura Informatics Engineering Study Program Pamekasan Indonesia Bina Nusantara University BINUS Business School Undergraduate Program Entrepreneurship Department Jakarta11480 Indonesia

ISBN: (纸本)9798350313956

Using the Scopus database, this study aims to investigate the use of artificial intelligence for cancer detection in the last ten years from 2013 to 2022. The researchers used bibliometric analysis combined with VosViewer and Rstudio software quantification method for literature analysis. The results of the flushed articles show data such as publication year, journal, country, keywords, and authors, to the highest number of citations. Common keywords used by researchers are artificial intelligence, medical, and human. Researchers limited the findings through keywords such as in the last ten years, documents are journals, and English only so that 1868 articles were obtained. The results found that Harvard Medical School affiliation had the highest number of articles, with 101 articles, by subject area, Medicine had a proportion of 41.9% (n=1320). This bibliometric study will be useful for other researchers to examine the development of research on Artificial Intelligence for Cancer Detection in the last ten years. © 2023 IEEE.

关键词： Diseases

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Internet of Medical Things: A Bibliometric Analysis of Research Publications from 2018–2022 4th

Internet of Medical Things: A Bibliometric Analysis of Resea...

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4th International Conference on Electronics, Biomedical engineering, and Health Informatics, ICEBEHI 2023

作者： Maulana, Fairuz Iqbal Lestari, Dian Adi, Puput Dani Prasetyo Arifin, Mohammad Nazir Purnomo, Agung Computer Science Department School of Computer Science Bina Nusantara University Jakarta11480 Indonesia Faculty of Medicine Universitas Airlangga Surabaya60132 Indonesia Telecommunication Research Center National Research and Innovation Agency Jakarta11480 Indonesia Informatics Engineering Study Program University of Madura Pamekasan Indonesia Entrepreneurship Department BINUS Business School Undergraduate Program Bina Nusantara University Jakarta11480 Indonesia

ISBN: (纸本)9789819714629

The field of the Internet of Medical Things (IoMT) is experiencing significant growth as it involves the integration of medical devices and systems with the internet and various digital technologies. This study provides a bibliometric analysis of scholarly articles pertaining to the Internet of Medical Things (IoMT) during the time frame of 2018 to 2022. The analysis is conducted using data sourced from the Scopus database. A total of 1165 documents were identified and analyzed to gain insights into the current state of research in this field. The analysis includes trends in publication output, top authors and institutions, and key research topics. The results of the analysis indicate a steady increase in publication output on IoMT over the past five years, with the highest number of publications in 2022. The top authors in this field were Mohanty, S.P., Kougianos, E., and Pirbhulal, S., while the top institutions were King Saud University, Chinese Academy of Sciences, and University of North Texas. Co-citation analysis revealed that wearable devices, telemedicine, and data analytics were among the key research topics in IoMT. This bibliometric analysis offers useful insights into the present research landscape of the Internet of Medical Things (IoMT) spanning the years 2018 to 2022. The findings can be beneficial for researchers, practitioners, policymakers, and funding agencies in understanding the trends and priorities in this field. The top authors and institutions identified in this analysis can serve as valuable resources for collaboration and staying updated on the latest developments in IoMT. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Digital devices

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Wireless Disturbance Mapping and Path Selection for Placement of Network Control System Components 2

Wireless Disturbance Mapping and Path Selection for Placemen...

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2nd International Conference on Mechanical, Electronics, Computer, and Industrial Technology, MECnIT 2018

作者： Joelianto, Endra Ghazali, Muhammad Zhaka Juhana, Tutun Instrumentation and Control Research Group Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Engineering Physics Study Program Faculty of Industrial Technology Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia Telecommunication Engineering School of Electrical and Informatics Institut Teknologi Bandung Jl. Ganesha 10 Bandung40132 Indonesia

Wireless transmitters in measurement instruments act for transmitting data or signals using radio frequency or currently better known as WIFI by means of 2.4 GHz. WIFI is a wireless local area network (WLAN) communication network. With the existence of telecommunications, measurement and control in industrial processes are heading to a high level of reliability compared to the conventional wired instruments in reaching hard locations or dangerous and hazardous areas. However, this cannot be done easily especially in maintaining the communication performances. Research is needed on the reliability of the wireless transmitter itself. Several factors such as communication disruptions are new challenges for the industry of wireless technology manufacturers to be able to prevent or to minimize errors that can arise in wireless network control systems. Signal strength mapping is needed in designing wireless network control systems. In this paper, the mapping is performed by measuring the signal strength parameters (Power Level) and the use of channels (Channel Usage) at planned locations. The measurement results are then used as sample points in the mapping. Data show that the signal strength measurement at each channel has a maximum of - 60 dBm and a minimum of -105 dBm. Mapping is performed by using two methods, namely Inverse Distance Weight (IDW) and Spline Interpolation (SI) methods. The paper proposes an algorithm to select the appropriate wireless communication paths from the planned locations. The mapping results indicate the appropriate area to place the transmitter and the receiver devices in a wireless data transmission network. With good placement, it is expected that measurements using wireless transmitters have minimum disruptions. © 2019 Published under licence by IOP Publishing Ltd.

关键词： Mapping

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