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International Conference on Science and Innovated engineering 2018, i-COSINE 2018

作者： Suryati Misriana Safitri, Nelly Telecommunication Engineering Study Program Politeknik Negeri Lhokseumawe Indonesia Electrical Engineering Study Program Politeknik Negeri Lhokseumawe Indonesia

New trends for making an all-weather photovoltaic (PV) that is able to trigger by both sunlight and raindrops become trends in developing the solar energy systems to generate electricity for households, industries and buildings. The idea is to develop a hybrid device that harvests kinetic energy from water without destroying the output of the solar cell during sunny times. This paper reviews the two devices of hybrid sunlight and raindrops, namely are the Triboelectric Nano Generator (TENG) and Pseudo Capacitor Graphene Layer (PCGL), respectively. Both TENG and PCGL similarly in such way places two transparent polymer layers on top of PV cell. When raindrops fall on to the layers and then roll off, the friction generates a static electricity charge. In addition, these devices even could provide electricity at night whenever there is rain. These two trends of all-weather PV obviously have advantages and drawbacks, as they have been developed in order to make them more compact and efficient as the device that harvesting sunlight during dry seasons and rainfall during wet seasons both for days and nights. © Published under licence by IOP Publishing Ltd.

关键词： Rain

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IoT Techniques Implementation to Coordinate Single-phase Rooftop PVs in Three-phase LV Network

IoT Techniques Implementation to Coordinate Single-phase Roo...

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International Conference on Science and Innovated engineering 2018, i-COSINE 2018

作者： Safitri, Nelly Yassir Rachmawati Hayati, Raisah Electric Engineering Study Program - Politeknik Negeri Lhokseumawe Indonesia Telecommunication Engineering Study Program - Politeknik Negeri Lhokseumawe Indonesia

As the single-phase rooftop photovoltaics (PVs) are installed into the three-phase low voltage (LV) distribution network, the network voltage profiles become unbalanced. Although the load at the customer side has already imbalanced the network, as the single-phase rooftop PVs with random ratings of 1-5kW are installed, the power quality issues, such as voltage magnitude and angle, frequency, active and reactive powers become significantly noticeable. This is because of the grid infrastructure from plants to beyond the customer side is disrupted as several utility devices added into the network. This paper aims to implement the concept of several internets of things (IoT) techniques into the electric and communication infrastructures as they are virtuously cycling, enabling, amplifying and reinforcing the infrastructure development. This concept also applied to the voltage regulation technique (VRT), in order to improve the voltage unbalanced and other power quality issues. This communication-based VRT has been conducted by the authors in their previous studies. The results show that the concept of IoT techniques successfully implemented if both communication devices and technology properly selected and designed. Additionally, the considered classifying of the communication layers also plays an important role to coordinate sensors actuators and meters along the feeder of the LV network. © Published under licence by IOP Publishing Ltd.

关键词： Internet of things

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Acoustic Noise Mapping on Various Location in Surabaya 21

Acoustic Noise Mapping on Various Location in Surabaya

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21st International Electronics Symposium, IES 2019

作者： Rosmala, Olivia Putri Budi Santoso, Tri Huda, Miftahul Politeknik Elektronika Negeri Surabaya Telecommunication Engineering Study Program Surabaya Indonesia

ISBN: (纸本)9781728144498

Environmental noise level is usually linked to the life quality of a certain place because it can affect its convenience of economy activities to its convenience of education activities. To find out the level of acceptable noise level, noise mapping needs to be done. This step is very useful in determining the characteristics of noise that occurs in the area. In this research, a series of environmental noise measurements had conducted in three different locations, which are SMA Negeri 15 Surabaya, SMA Khadijah Surabaya, and Politeknik Elektronika Negeri Surabaya. The measurement began with sound recording, then followed by distribution pattern analysis, power spectral density analysis, and spectrogram analysis. These parameters will be used as references in noise mapping. Based on the results of noise mapping in each location shows that SMA Negeri 15 Surabaya has a dominant frequency noise below 7 kHz with noise levels up to 45 dB. Whereas in other locations, which are SMA Khadijah Surabaya and Politeknik Elektronika Negeri Surabaya, the dominant frequency was below 10 kHz with noise levels up to 60 dB. © 2019 IEEE.

关键词： Location

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A combined user-order and chunk-order algorithm to minimize the average BER for chunk allocation in SCFDMA systems

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Telkomnika (telecommunication Computing Electronics and Control) 2016年第2期14卷 574-587页

作者： Fahmi, Arfianto Astuti, Rina Pudji Meylani, Linda Asvial, Muhamad Gunawan, Dadang Telecommunication Engineering Study Program School of Electrical Engineering Telkom University Jalan Telekomunikasi no. 1 Terusan Buah Batu Bandung Indonesia Electrical Engineering Department University of Indonesia Depok Indonesia

A Chunk by chunk-based allocation is an emerging subcarrier allocation in Single Carrier Frequency Division Multiple Access (SC-FDMA) due to its low complexity. In this paper, a combined userorder and chunk-order allocation for solving chunk allocation problem which minimizes the average BER of all users while improving the throughput in SC-FDMA uplink is proposed. The subcarrier grouping into a chunk of all users on both-order allocations are performed by averaging the BER of a contiguous subcarriers within a chunk. The sequence of allocation is according to the average of users' BER on userorder allocation and the average of chunks' BER on chunk-order allocation. The best allocation is determined by choosing one of both-order allocations which provides the smaller BER systems. The simulation results showed that the proposed algorithm can outperform the previous algorithms in term of average BER and throughput without increase the time complexity. © 2016 Universitas Ahmad Dahlan.

关键词： Frequency division multiple access

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Distributed FFR as the novelty solution of the integration Femtocell and macrocell in cellular network

Distributed FFR as the novelty solution of the integration F...

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IEEE Asia Pacific Conference on Wireless and Mobile, APWiMob 2015

作者： Yusuf, Nur Fahmi, Arfianto Astuti, Rina Pudji Budiman, Gelar School of Electrical Engineering Telkom University Bandung Indonesia Telecommunication Engineering Study Program Telkom University Bandung Indonesia

ISBN: (纸本)9781479982905

LTE-Advanced and Femtocell are deployed by cellular operators to improve the coverage and capacity to respond the demand for higher data rates in wireless networks. Integration of femtocell into cellular network faced interference between femtocell and macrocell. Several scenarios based on Fractional Frequency Reuse (FFR) methods have been proposed to mitigate this interference, including integer fractional fraction reuse (FFR), soft frequency reuse (SFR), frequency frequency reuse orde-3 (FFR-3) and optimal static fractional frequency reuse (OSFFR). The study proposes Distributed Fractional Frequency Reuse scenario to mitigate interference and improve performance simultaneously. Distributed fractional Frequency reuse (DFFR) is an improvement of OSFFR by allocating sub-bands proportional and it is reused for each sector. © 2015 IEEE.

关键词： Femtocell

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Analysis of Diameter Changes Effect on Radiation Element to Improve Characteristics of Fullwave Loop Antenna

Analysis of Diameter Changes Effect on Radiation Element to ...

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International Conference on Science and Innovated engineering 2018, i-COSINE 2018

作者： Denti, Amir Razi, Fakhrur Indrawati Syamsul Telecommunication T Network Engineering Technology Study Program Electrical Engineering Department Politeknik Negeri Lhokseumawe Indonesia Multimedia and Networking Study Program Information Technology and Computers Politeknik Negeri Lhokseumawe Indonesia

The article explained about the analysis of effect changes the diameter of radiating elements to the improvement of antenna characteristics. The antenna radiating element studied was solid copper wire and the type of antenna observed was an antenna that had a circular contour called the Full Wave Loop antenna. This antenna is use for digital television broadcast receiver applications and has a circle radius of 16 cm. Improved antenna characteristics were analyze for 3 types of radiation element diameter, namely;3.5 mm;2.5 mm and 2.0 mm. The Antennas were operated in a working frequency of 586 MHz, which is for digital television receiver broadcast channels. Based on the test data on the 3 diameter antenna elements and calculation analysis, it is known that the improvement is characteristics VWSR occurs in the radiation element with 2.0 mm diameter, the VSWR value is 1.93, return loss is 7.6 dB, antenna impedance is 97 Ω, gain of 12.88 dBi and antenna bandwidth of 7,17% and gain of 12.86 dBi, while the antenna characteristics of the radiating elements that are 2.5 mm and 3.5 mm larger are worse, among others;for VSWR 2.7 and 3.63. Return loss is -6,9 dB and 4.9 dB. Antenna impedance was 135 Ω and 175 Ω. The antenna gain was 8.78 dBi and 7.1 dBi. The smaller the diameter of the radiating element in the Full Wave Loop antenna will improve the characteristics of VSWR, Return loss, input impedance, gain. On the other hand, the smaller the radiation element will reduce the antenna bandwidth, so it is necessary to look for other methods to improve bandwidth capacity without changing the four characteristics of the good antenna. Likewise, the equation for determining the physical size of the radiating element is redefined. © Published under licence by IOP Publishing Ltd.

关键词： Bandwidth

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Interference Management Using Power Allocation for Downlink Transmission of Femtocell-Macrocell Ultra Dense Networks 9

Interference Management Using Power Allocation for Downlink ...

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9th International Conference on Information Technology, Computer and Electrical engineering, ICITACEE 2022

作者： Suryani, Sri Susanto, Misfa Sadnowo, Ageng Hasim, Sitronella Nurfitriani Hamdani, Fadil University of Lampung Bandar Department of Electrical Engineering Lampung Indonesia Institute Technology of Sumatera South Study Program of Telecommunication Engineering Lampung Indonesia

ISBN: (数字)9781665471503

ISBN: (纸本)9781665471480

Femtocell is a promising technology to increase network capacity and coverage, especially in indoor areas. It has low power, short range. The Home Base Station/HeNB (Femtocell Base Station) can be installed by users using connection of personal equipment such as laptops, notepads and cell phones, and it is activated by service provider. By deploying femtocells into existing macrocell/microcell areas, the radio resources are shared among femtocells and existing macrocells. However, the sharing of limited available bandwidth frequency licenses cause interference problems between femtocells and/or macrocells. The interference problem becomes more complex when the number of deployed femtocells is many and dense creating a phenomenon of Ultra Dense Network (UDN). To cope with this interference problem, this paper proposes a power allocation method for femtocells deployed in macrocells areas (UDN) at downlink transmissions. In this method the power transmitted at HeNB to each femtocell user is adjusted in such a way as to reduce or increase the transmitted power at HeNB. If the estimated SINR value at current time is less than 20 dB, the power on the HeNB is increased by such a way so SINR is expectedly to be 20 dB for next transmission time. However, if the obtained SINR at current transmission time is more than 20 dB, then the transmission power at the HeNB is reduced so that the SINR value becomes 20 dB for the next transmission time. Extensive simulation has been carried out and the performance parameters in terms of SINR, throughput, and BER have been measured and compared to the baseline system, i.e., the system without power allocation method. The simulation results show that the system that applies power allocation method which is used in the cell edge area is better than the baseline system both in the center and the edge of cells. © 2022 IEEE.

关键词： Femtocell

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Spatial Selection Configuration on EEG Stroke Signal 1

Spatial Selection Configuration on EEG Stroke Signal

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1st International Conference on Information System and Information Technology, ICISIT 2022

作者： Firdaus, Fulki Hapsari, Anggit Fauzi, Hilman Shapiai, Ibrahim Fuadah, Yunendah Telkom University Telecommunication Engineering Study Program Faculty of Electrical Engineering Bandung Indonesia Telkom University Biomedical Engineering Study Program Faculty of Electrical Engineering Bandung Indonesia Malaysia-Japan International Institute of Technology Universiti Teknologi Malaysia Electrical System Engineering Kuala Lumpur Malaysia

ISBN: (数字)9781665402002

ISBN: (纸本)9781665402002

Stroke is one of the cerebrovascular health disorders caused by a blockage of blood flow to the brain. Data from South East Asian Medical Information Center (SEAMIC) explain that the most significant stroke mortality occurred in Indonesia, Philippines, Singapore, Brunei, Malaysia, and Thailand. There are several methods for diagnosing stroke, one of which is an electroencephalograph (EEG). EEG is one of the more widely used BCI methods due to its lower price, portability, ease of use, and high temporal resolution than other methods. Most EEG require signals from various places on the scalp to achieve good performance. However, using a large number of channels can degrade signal performance in the EEG. Spatial selection can be used for channel selection in the EEG stroke signal which can then be useful for evaluation of stroke therapy. Therefore, this study will select the optimized channel using the spatial selection method to see which channels are relevant to the EEG stroke signal. Also, using the Power Spectral Density extraction feature and Extreme Learning Machine classification. The L2-norm energy calculation method gets better results than other methods. This method can also select the active channel relevant to the stroke EEG signal. The results show that the spatial selection method can increase accuracy by 15 percent and optimize the system with 37.5 percent channel reductions. © 2022 IEEE.

关键词： Learning systems

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Emerging Potential on Laser Engraving Method in Fabricating Mold for Microfluidic Technology 1

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2nd International Conference on Electronics, Biomedical engineering, and Health Informatics, ICEBEHI 2021

作者： Yusro, Muhammad Biomedical Engineering Study Program Faculty of Telecommunication and Electrical Engineering Institut Teknologi Telkom Purwokerto Jalan D.I. Panjaitan 128 Purwokerto Indonesia

ISBN: (数字)9789811918049

ISBN: (纸本)9789811918032

The microfluidic device needs multi-step fabrication, and this process relatively takes time because it requires meticulous treatment. This approach, using laser engraving, reduces the conventional mold fabrication step which is created by soft lithography in the cleanroom. For biomedical research purposes, a certain dimension of the microfluidic design needs to be achieved. Meanwhile, different material needs different variable setting in laser engraving. This article’s research objectives are seeking the optimum variable to achieve targeted dimension and investigating the influenced parameters lead to better understand the laser engraving fabrication process. The Poly (methyl methacrylate) (PMMA) sheets had been engraved to a particular dimension refers to the mold design that uses in the microfluidic device. The result showed that parameters meet the desired dimension found at values: 1000 for resolution, 95 for power, 500 for frequency, and 60 for speed. It can be noted that these adjusted parameters were performed for a single passage. Moreover, these influenced parameters also had been investigated to see their effect related to the engraving result. The result showed that the speed was the most significant parameter meanwhile the frequency has a stagnant value in the laser engraving process. This study also observed that higher resolution could smoother the rough surface. This study emerges the potential of laser engraving as rapid prototyping machinery for microfluidic technology. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Microfluidics

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study of performance analysis of Ka-Band satellite communication link in Makassar

Study of performance analysis of Ka-Band satellite communica...

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Makassar International Conference on Electrical engineering and Informatics (MICEEI)

作者： Muhammad Mimsyad Abdullah Bazergan Yuliana Rauf Telecommunication Engineering Study Program Politeknik Negeri Ujung Pandang

This research aims to analyze link performance of Ka-Band satellite communication in Makassar. Analysis is carried out by calculating rain rate of time integration of 1 minute based on the Chebil model and then predicting rain attenuation based on the ITU - R P.618 - 8 model. Performance analysis is performed by link budget analysis to provide the knowledge of link availability. The result shows that rain attenuation for downlink of Ka-Band satellite link in Makassar is 19.92 dB at availability of 99.5% in one year. Whereas availability of 99.5% can be reached in which this availability is still allowed for internet access application.

关键词： Modulation Downlink Internet Polarization Availability

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