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ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika
Published by Institut Teknologi Nasional Bandung
ISSN : 23388323     EISSN : 24599638     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering Engineering
Jurnal ELKOMIKA diterbitkan 3 (tiga) kali dalam satu tahun pada bulan Januari, Mei dan September. Jurnal ini berisi tulisan yang diangkat dari hasil penelitian dan kajian analisis di bidang ilmu pengetahuan dan teknologi, khususnya pada Teknik Energi Elektrik, Teknik Telekomunikasi, dan Teknik Elektronika.
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Articles 19 Documents
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Search results for , issue "Vol 9, No 3: Published July 2021" : 19 Documents clear
Algoritma Epsilon Greedy pada Reinforcement Learning untuk Modulasi Adaptif Komunikasi Vehicle to Infrastructure (V2I) KURNIAWATI, NAZMIA; NINGSIH, YULI KURNIA; PUSPA, SOFIA DEBI; ADI, TRI SWASONO
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.716

Abstract

ABSTRAKKomunikasi Vehicle to Infrastructure (V2I) memungkinkan kendaraan dapat terhubung ke berbagai macam infrastruktur. Dengan kondisi kendaraan yang bergerak, maka kondisi lingkungan yang dilewati mempengaruhi parameter komunikasi. Implementasi modulasi adaptif pada skema V2I memperbolehkan sistem menggunakan skema modulasi yang berbeda untuk mengakomodasi perubahan kondisi lingkungan. Pada penelitian ini digunakan skema modulasi QPSK, 8PSK, dan 16-QAM dengan memanfaatkan reinforcement learning dan algoritma epsilon greedy untuk menentukan skema modulasi yang digunakan berdasarkan level AWGN. Dari hasil simulasi dengan kondisi nilai epsilon yang divariasikan dari 0.1 hingga 0.5 didapatkan bahwa semakin tinggi nilai epsilon maka semakin sering agen tidak memilih skema modulasi dengan reward tertinggi.Kata kunci: Reinforcement learning, Modulasi Adaptif, AWGN ABSTRACTVehicle to Infrastructure (V2I) communication allows vehicles to be connected to various infrastructures. Under the scenario of a moving vehicle, the environmental conditions which is passed by the vehicle will affect the communication parameters. The adaptive modulation implementation in the V2I scheme allows the system to use different modulation schemes to accommodate changing environmental conditions. In this study, the QPSK, 8PSK, and 16-QAM modulation schemes were used by utilizing reinforcement learning and the epsilon greedy algorithm to determine the modulation scheme used based on AWGN level. From the simulation results with the conditions of the epsilon value varying from 0.1 to 0.5, it is found that the higher the epsilon value, the more often the agent does not choose the modulation scheme with the highest reward.Keywords: Reinforcement learning, Adaptive Modulation, AWGN
Penerima Gelombang ELF berbasis Op-Amp untuk Pengolahan Akuisisi Data Gempa Bumi ASTHAN, RHEYUNIARTO SAHLENDAR; CORIO, DEAN; ULFAH, MIA MARIA; RAMADHANI, URI ARTA; MUNIR, ACHMAD
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.592

Abstract

ABSTRAKPenelitian ini membahas mengenai penerima gelombang extremely low frequency (ELF) untuk pengolahan akuisisi data gempa bumi. Penerima ELF dirancang menggunakan operational amplifier (Op-Amp) dengan masukan takmembalik. Sinyal yang diterima oleh antena diteruskan ke penerima ELF yang terdiri dari preamplifier dan amplifier untuk proses penguatan, serta filter aktif orde 2 untuk menekan sinyal di atas frekuensi cut-off sebesar 50Hz. Karakterisasi penerima ELF dilakukan dengan mengamati perbandingan level tegangan sinyal keluaran terhadap level tegangan sinyal masukan, sensitivitas, serta bentuk sinyal keluaran dari penerima ELF dalam domain waktu. Hasil simulasi menunjukkan bahwa penerima ELF menghasilkan penguatan sebesar 60,8dB dengan sensitifitas tinggi untuk level sinyal masukan di bawah -30dB yang mampu memenuhi level sinyal untuk pengolahan akuisisi data.Kata kunci: extremely low frequency, penerima ELF, operational amplifier, filter aktif, gempa bumi ABSTRACTThis research presents extremely low frequency (ELF) receiver for earthquake data acquisition processing. The ELF receiver is designed based on non-inverting operational amplifier (Op-Amp). The signal received by the antenna is fed into ELF receiver which consists of preamplifier and amplifier for amplification, and second order active filter to suppress unwanted signal above the cut-off frequency of 50Hz. Characterization of ELF receiver is performed by observing the comparison of the level output signal to level input signal, sensitivity, and ELF receiver signal output in time domain. The simulation results show that the ELF receiver has gain of 60.8dB with high sensitivity for low level input signals below -30dB that is able to meet signal level for data acquisition processing.Keywords: extremely low frequency, ELF receiver, operational amplifier, active filter, earthquake
Perencanaan LTE-A untuk Heterogeneous Network dengan Metode CADS4 di Grand Asia Afrika ARIYANTO, YOGI; PUTRI, HASANAH; NOVIANTI, ATIK
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.663

Abstract

ABSTRAKBerdasarkan hasil pengukuran di Grand Asia Afrika (GAA) diketahui terdapat peningkatan kualitas jaringan setelah pemasangan unit COMBAT selama 7 hari. RSRP ≥ -95 dBm sebelumnya sebesar 75,70% menjadi 100%, SINR ≥ 0 dB dari 53,58% menjadi 97,54%, dan throughput ≥ 8 Mbps sebelumnya sebesar 48,12% menjadi 89,55%. Untuk mempertahankan kualitas tersebut maka dibangunlah small cell. Perencanaan menerapkan metode inter-band carrier aggregation pada heterogen network LTE dengan skema CADS4 sebagai pengganti unit COMBAT. Tujuan perencanaan ini adalah extended throughput dan agar kualitas layanan pada beban trafik tinggi tetap baik. Macro cell sebagai Primary Cell (PCell) pada band-1 2100 MHz dan micro cell sebagai Secondary Cell (SCell) pada band-3 1800 MHz. Hasil perencanaan menunjukkan telah memenuhi standar RF Parameter LTE yaitu RSRP sebesar -92,65 dBm, SINR sebesar 16,55 dB, throughput sebesar 1,062 Mbps, dan user connected 97%.Kata kunci: LTE-A, heterogen network, CADS4, Great Asia Afrika Bandung ABSTRACTBased on the report on the development of temporary sites in the tourist area of Great Asia Africa (GAA), it shows that the DRR rate is> 90% in the sectors leading to GAA. From the measurement, it is known that there is an increase in network quality after installing the COMBAT unit for 7 days. For RSRP ≥ -95 dBm, the previous amount was 75.70% to 100.00%, for SINR ≥ 0 dB previously it was 53.58% to 97.54%, and for throughput ≥ 8 Mbps the previous was 48.12% to 89,55%. To maintain the quality of the network, small cells were built to cover the GAA area. Planning to apply the inter-band carrier aggregation method to the heterogeneous LTE network with the CADS4 scheme to replace the COMBAT unit. The purpose of planning is to provide extended throughput and so that the service quality at high traffic loads remains good. The configuration used is a macro cell as a Primary Cell (PCell) in the band-1 2100 MHz and a micro cell as a Secondry Cell (SCell) in the 1800 MHz band-3. The results of the planning meet the LTE parameter RF standards, RSRP of -92.65 dBm, SINR of 16.55 dB, throughput of 1.062 Mbps, and users connected to 97%.Keywords: LTE-A, heterogen network, CADS4, Great Asia Afrika Bandung
Pengaruh Harmonisa Penggerak Kecepatan Variabel terhadap Kinerja Motor DC FanTest Set SAODAH, SITI; WIWIT, I MADE; DENI, AHMAD; SODIQ, DJAFAR; PUGUH, BAMBANG
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.505

Abstract

ABSTRAKFan test set merupakan salah satu peralatan penting laboratorium di Jurusan Teknik Konversi Energi yang digunakan untuk menguji karakteristik laju perpindahan fluida. Alat ini terdiri dari gandengan motor DC penguatan bebas dan kipas. Fan test set ini dapat menghasilkan aliran udara yang tetap atau berubahubah dengan menetapkan atau mengubah-ubah kecepatan putaran kipasnya. Kecepatan putaran kipas ini sendiri diatur melalui kecepatan putaran motor dc penggeraknya. Dalam kegiatan penelitian ini telah dilakukan perancangan dan pembuatan konverter ac/dc terkendali yang dapat mengubah daya listrik arus ac menjadi daya listrik arus dc yang dapat dikendalikan. Daya listrik dc variabel yang dihasilkan selanjutnya digunakan untuk menyuplai belitan jangkar motor dc agar kecepatan putaran kipas dan aliran udara dapat dikendalikan. Perangkat ini dapat menghasilkan tegangan keluaran dalam rentang 10 – 100 V dc yang mampu memutar motor dc dari 203,6 – 1849 rpm dan menghasilkan harmonisa yang sebesar 6,7% saat vibrasi motor mencapai 2,8 mm/s.Kata kunci: beban nol, fan test set, harmonisa, konverter ac/dc ABSTRACTFan test set is one of the important laboratory equipment in the Department of Energy Conversion Engineering which is used to test the characteristics of the fluid transfer rate. It consists of a coupled free-amplifying DC motor and fan. This fan test set can produce a fixed or changing airflow by setting or varying the fan speed. The rotational speed of the fan itself is regulated through the rotational speed of the dc motor driving it. In this research activity, the design and manufacture of a controlled ac/dc converter that can convert ac into controllable dc power has been carried out. The resulting variable dc power is then used to supply the DC motor anchor winding so that the fan rotation speed and air flow can be controlled. This device can produce an output voltage in the range of 10 - 100 V dc which is capable of rotating a dc motor from 203.6 - 1849 rpm and producing a harmonic of 6.7% when the motor vibration reaches 2.8 mm / s.Keywords: no load, fan test set, harmonics, ac/dc converter
Evaluasi Kinerja GSM VoIP Gateway pada Sistem IP PBX ANDRIANTO, HERI; SETIADIKARUNIA, DANIEL; RAHARJO, HENDRY
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.731

Abstract

ABSTRAKGSM VoIP Gateway digunakan untuk menghubungkan jaringan VoIP dengan jaringan GSM sehingga memungkinkan VoIP client melakukan komunikasi dengan VoIP client lain melalui jaringan GSM sehingga biaya komunikasi dapat ditekan. Pada penelitian ini, telah dirancang dan direalisasikan sistem IP PBX yang dihubungkan ke jaringan GSM menggunakan GSM VoIP Gateway. Evaluasi kinerja GSM VoIP Gateway pada sistem IP PBX dilakukan dengan mengamati nilai parameter Quality of Service (QoS). Komunikasi antara VoIP client dengan GSM VoIP Gateway dikategorikan pada kualitas layanan VoIP yang baik karena memiliki nilai rata-rata jitter ≤ 5,7 ms, packet loss ≤ 0,18% dan delay ≤ 9,41 ms. Komunikasi antara softphone SIPdroid dengan GSM VoIP Gateway memiliki nilai rata-rata jitter 22,58 ms, paket loss 48,68%, dan delay 14,54 ms, hal ini disebabkan karena komunikasi VoIP menggunakan koneksi WiFi. Selain itu perbedaan spesifikasi perangkat keras dan perangkat lunak juga turut mempengaruhi nilai parameter QoS.Kata kunci: GSM VoIP Gateway, IP PBX, VoIP ABSTRACTGSM VoIP Gateway is used to connect the VoIP network to the GSM network, allowing VoIP clients to communicate with other VoIP clients via the GSM network therefore the communication costs can be reduced. In this research, an IP PBX system connected to a GSM network using a GSM VoIP Gateway has been designed and realized. Performance evaluation of the GSM VoIP Gateway on the IP PBX system is carried out by observing the value of the Quality of Service (QoS) parameter. Communication between the VoIP client and GSM VoIP Gateway is categorized as a good quality VoIP service because it has an average value of jitter ≤ 5.7 ms, packet loss ≤ 0.18% and delay ≤ 9.41 ms. Communication between the SIPdroid softphone and the GSM VoIP Gateway has an average jitter value of 22.58 ms, a packet loss of 48.68%, and a delay of 14.54 ms, due to VoIP communication uses a WiFi connection. In addition, differences on hardware and software specifications also affect the value of QoS parameters.Keywords: GSM VoIP Gateway, IP PBX, VoIP
Antena Mikrostrip Biosensor untuk Deteksi Virus pada Darah RAHAYU, YUSNITA; KURNIATI, MEILITA; QODRIYAH, INESTI LAILATUL
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.604

Abstract

ABSTRAKKemajuan teknologi gelombang mikro memainkan peran penting dalam berbagai aplikasi diagnosa dan deteksi penyakit. Penelitian ini mengusulkan dua model antena untuk mendeteksi virus menggunakan Antena Mikrostrip Biosensor yang beroperasi pada ISM band (2,4-2,5 GHz). Antena yang diusulkan disimulasikan pada Software CST dengan material substrat Roger 3010. Hasil simulasi yang diperoleh antena pertama beroperasi pada 2,46 GHz, return loss -19,76 dB, bandwidth 401,2 MHz. Antena kedua pada 2,45 GHz, return loss -22,51 dB, bandwidth 227,4 MHz. Hasil simulasi pengujian menggunakan phantom darah menunjukkan pergeseran frekuensi semakin rendah dengan antena pertama 2,38 GHz dan antena kedua 2,43 GHz. Pengukuran antena pertama beroperasi pada 2,5 GHz dengan return loss -21,55 dB dan antena kedua beroperasi pada 2,47 GHz dengan return loss -28 dB. Pengukuran antena menggunakan VNA menunjukkan pergeseran frekuensi semakin meningkat diikuti return loss semakin rendah dibandingkan dengan hasil simulasi.Kata kunci: antena deteksi virus, ISM, proximity coupled, mikrostrip, phantom.ABSTRACTAdvances in microwave technology play an important role in a wide variety of disease diagnostic and detection applications. This study proposes two antenna models for virus detection using a Microstrip Biosensor antenna that operates on the ISM band (2.4-2.5 GHz). The proposed antenna is simulated in CST software with Roger 3010 substrate material. The simulation results obtained by the first antenna operate at 2.46 GHz, return loss of -19.76 dB, a bandwidth of 401.2 MHz. The second antenna at 2.45 GHz, return loss of -22.51 dB, a bandwidth of 227.4 MHz. The test simulation results using blood phantom show that the frequency shift is getting lower with the first antenna at 2.38 GHz and the second antenna at 2.43 GHz. The first antenna measurement operates at 2.5 GHz with a return loss of -21.55 dB and the second antenna operates at 2.47 GHz with a return loss of -28 dB. Antenna measurement using VNA shows that the frequency shift is increasing followed by lower return loss compared to the simulation results.Keywords: antena for virus detection, ISM, proximity coupled, microstrip, phantom.
Penerapan DevOps pada Sistem Tertanam dengan ESP8266 menggunakan Mekanisme Over The Air NUGRAHA, AZIS WISNU WIDHI; ROSYADI, IMRON; KHOERULLATIF, FAHMI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.678

Abstract

ABSTRAKDevOps mendorong percepatan pengembangan sistem. Namun bukti nyata penerapannya pada sistem tertanam belum mencukupi. Salah satu penyebabnya adalah kesulitan proses deployment pada perangkat. Konsep IoT menghubungkan sistem tertanam dengan jaringan yang memungkinkan proses pembaharuan firmware menggunakan mekanisme Over The Air (OTA). Tulisan ini mengusulkan infrastruktur DevOps untuk pengembangan sistem tertanam. Perangkat keras yang digunakan adalah microcontroller ESP8266. Sedangkan lingkungan DevOps menggunakan perangkat lunak PlatformIO, GitHub dan Travis CI. Pengujian dilakukan dengan mengubah user requirement yang kemudian diterapkan pada perangkat keras. Tahapan DevOps (build and test, release hingga deploy) telah berhasil dilakukan secara otomatis. Sistem mampu mendeteksi kesalahan penulisan kode sumber. Rerata waktu keseluruhan proses adalah 77,21 detik. Proses build and test mendominasi waktu proses dengan rerata sebesar 77,21 detik dan waktu deploy memiliki rerata 1,41 detik.Kata kunci: IoT, Sistem Tertanam, OTA, DevOps, ESP8266 ABSTRACTDevOps drives the acceleration of system development. However, the concrete evidence of its application in embedded systems is not sufficient. One of the causes is difficulty in the deployment process on the device. Firmware update using an Over-The-Air (OTA) mechanism is allowed by the IoT concept that connects embedded systems into a network. This paper is proposing a DevOps infrastructure for embedded system development. Proposed infrastructure using ESP8266 for the hardware and PlatformIO, GitHub, and Travis CI for the DevOps environment. Testing the proposed system is done by changing the user requirements that are applied to the hardware. The DevOps stages from building and test, release, and deployment have automatically been done. The system is also able to detect developer errors in writing source code. The average time of the whole process on trial was 77.21 seconds. The build and test process dominates the processing time with an average of 77.21 seconds and the deployment time is relatively short with an average of 1.41 seconds.Keywords: IoT, Embedded System, OTA, DevOps, ESP8266
Analisis Prediksi Path Loss Teknologi Seluler 5G Pada Sel Micro Urban Wilayah Kota Bandung ARYANTA, DWI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.548

Abstract

ABSTRAKImplementasi teknologi seluler 5G di Indonesia perlu dilakukan kajian dalam beberapa aspek. Analisis nilai path loss pada sistem seluler merupakan pendekatan dalam aspek large scale fading untuk menghitung cakupan layanan. Penelitian ini melakukan kajian nilai path loss dengan mengambil kondisi di Kota Bandung dengan karakter sel urban mikro outdoor. Model prediksi yang digunakan pada kajian ini meliputi model SUI, ABG, CI, dan NYUSIM simulator menggunakan frekuensi kerja 3,5 GHz dan 28 GHz dengan lebar pita 100 MHz dan 800 MHz. Hasil pengujian memperlihatkan simulator NYUSIM memberikan nilai prediksi path loss yang paling mendekati nilai rata-rata path loss dengan nilai margin sebesar 1,25 dB untuk frekuensi 3,5 GHz dan 1,8 dB untuk frekuensi 28 GHz. Frekuensi kerja 28 GHz memiliki nilai path loss lebih tinggi dibandingkan frekuensi 3,5 MHz sebesar 19 dB. Nilai path loss pada kondisi LOS dan NLOS berdampak pada penurunan nilai path loss sebesar 35% pada frekuensi 3,5 GHz dan 26% pada frekuensi 28 GHz.Kata kunci: path loss, micro cell, urban, NYUSIM, LOS, NLOS ABSTRACTThe implementation of 5G cellular technology in Indonesia needs to be studied in several aspects. Analysis of the path loss value on the cellular system is an approach in the aspect of large scale fading to calculate service coverage. This research studies the path loss value by taking conditions in the city of Bandung with the character of outdoor micro urban cells. The prediction models used in this study include the SUI, ABG, CI, and NYUSIM simulators using working frequencies of 3.5 GHz and 28 GHz with a bandwidth of 100 MHz and 800 MHz. The test results show that the NYUSIM simulator provides a path loss prediction value that is closest to the average path loss value with a margin value of 1.25 dB for the 3.5 GHz frequency and 1.8 dB for the 28 GHz frequency. The 28 GHz working frequency has a path loss value higher than the 3.5 MHz frequency of 19 dB. The path loss value in LOS and NLOS conditions has an impact on reducing the path loss value by 35% at a frequency of 3.5 GHz and 26% at a frequency of 28 GHz.Keywords: path loss, micro cell, urban, NYUSIM, LOS, NLOS
Indeks Subjeks dan Indeks Pengarang -, - INDEKS
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 9, No 3: Published July 2021
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v9i3.%p

Abstract

Indeks Subjeks dan Indeks Pengarang

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