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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Teknologi Elektro ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Community Development Journal: Jurnal Pengabdian Masyarakat Journal of Informatics and Communication Technology (JICT) International Journal of Engineering Continuity Jurnal Rekayasa elektrika Multifinance
Yus Natali
Universitas Telkom
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health

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PERANCANGAN LINK TRANSMISI MIKROWAVE MENGGUNAKAN TEKNIK SPACE DIVERSITY Yus Natali; Anisa Nur Cahyani
Jurnal Teknologi Elektro Vol 9, No 3 (2018)
Publisher : Electrical Engineering, Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6349.572 KB) | DOI: 10.22441/jte.v9i3.4352

Abstract

Penelitian ini akan membahas perancangan link transmisi mikrowave yang melintasi laut dari site Sekotong Barat hingga HUT Senggigi dan menganalisa kualitas link budget yang baik dari hasil perancangan menggunakan teknik space diversity. Space diversity adalah teknik yang menggunakan dua buah antena dalam satu site, satu antena sebagai antena TR (Transmit/Receive) dan satu lagi sebagai antena DR (Diversity Receiving) yang dipasang secara vertikal terpisah dengan jarak yang sudah ditentukan. Space diversity biasanya digunakan untuk mengatasi multipath fading pada sinyal radio mikrowave yang terjadi ketika melintasi lautan dan memiliki jarak lintasan yang jauh. Teknik ini sangat umum digunakan untuk memperbaiki kualitas link budget yang dihasilkan. Metodologi yang digunakan yaitu studi literatur, metode observasi dan metode survey. Parameter yang digunakan yaitu Receive Signal Level (RSL), Fading Margin dan Availability. Perancangan link transmisi yang dilakukan menggunakan software Pathloss 4.0. Hasil dari perancangan ini adalah Receive Signal Level RSL ≥ RX Threshold (-34,68 dBm ≥ -71,00 dBm), Fading Margin ≥ 30 dB (Fading Margin = 36,32 dB), Availability ≥ 99,999% (Availability = 99,99915%). Maka, dapat disimpulkan bahwa perancangan yang dilakukan sudah memenuhi syarat hasil link budget yang baik dan bisa di implementasikan di lapangan.Kata kunci : Availability, Fading Margin, Link Budget, Multipath Fading, Receive Signal Level, Space Diversity
N Implementasi Jaringan Serat Optik Untuk Backhaul 4G Frekuensi 1800 MHz Dengan Menggunakan Pendekatan Link Budget admin admin
Journal of Informatics and Communication Technology (JICT) Vol 1 No 1 (2019)
Publisher : PPM Institut Teknologi Telkom Telkom Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (861.436 KB) | DOI: 10.52661/j_ict.v1i1.14

Abstract

Penelitian ini bertujuan untuk mengetahui kualitas sinyal di Gedung Plaza 89 Kuningan Jakarta Selatan, dengan cara menganalisis jaringan serat optik menggunakan pendekatan link budget. Penulis memanfaatkan hasil perhitungan yang telah ada , setelah hasil pengukuran dimiliki maka selanjutnya langsung dapat dilakukannya suatu analisa. Sesuai atau tidak sesuai hasil dengan data atau standar SFP, maka tetap perlu dilakukan analisa. Penelitian ini lebih memperhatikan tentang bagaimana cara menganalisis jaringan 4G LTE ke Gedung Plaza 89 Jakarta Selatan dan diperlukan pula perhitungan yang tepat. Pada Proyek Akhir ini analisis jaringan LTE dilakukan pada Gedung Plaza 89 Kuningan Jakarta Selatan dengan jarak 9,8 km dari lokasi MME. Gedung tiga belas lantai ini hanya diambil tiga lantai saja yaitu lantai lima, empat dan tiga. Telah didapatkan hasil perhitungan total redaman masing-masing lantai, pada lantai lima sebesar 6,789 dB, lantai empat 6,764 dB dan terakhir pada lantai tiga sebesar 6,735 dB.
Hybrid Radio over Fiber with Radio over Free Space Optic for 5G Fronthaul Network Implementation in Urban Areas Nabila Syadzwina Effendi; Yus Natali; Catur Apriono
Jurnal Rekayasa Elektrika Vol 19, No 3 (2023)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v19i3.31842

Abstract

Optical fiber can meet the demand for fronthaul on 5G networks that offer high bandwidth, large capacity, high data rate and is free from electromagnetic interference. However, deploying infrastructure faces issues like permits and high costs. Hybrid Radio over Fiber (RoF) technology with Radio over Free Space Optic (RoFSO) can be a solution in urban areas, where the installation requires high costs. This research investigates a hybrid RoF-RoFSO scheme at a frequency of mmWave 26 GHz by considering atmospheric attenuation values arising from meteorological effects, such as rain, smog, and dust,  using Optisystem. This research considers QPSK, 16-QAM, and 64-QAM modulation schemes, distance variations on the FSO and the meteorological data from the Indonesian Meteorology, Climatology and Geophysics Agency (BMKG) from March 2022 to May 2022. The results show that attenuation due to high rainfall is the main cause of signal quality degradation and limits the transmission distance on the FSO link. The maximum distance is 600 m using the QPSK and 16-QAM modulation schemes, while for the 64-QAM modulation scheme, the maximum transmission distance is 500 m. Meanwhile, damping values caused by foggy and dusty conditions can reach distances of up to 1000 m for the three modulation schemes.
PELATIHAN MENYUSUN ANALISA BREAK EVENT POINT UNTUK PRODUK IOT PADA SMK PRUDENT SCHOOL Rahmadi Rahmadi; Liestyowati Liestyowati; Alva Nurvina Sularso; Yus Natali; Suyatno Suyatno
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 4 No. 4 (2023): Volume 4 Nomor 4 Tahun 2023
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v4i4.19454

Abstract

Kurikulum Merdeka Belajar yang diatur Mendikbud Ristek Nomor 56/M/2022 menjadi tantang tersendiri bagi sekolah-sekolah. Dampaknya, seluruh sekolah khususnya SMK Prudent School harus mampu memberikan kualitas dan ragam program untuk meningkatkan keilmuan peserta didik yang diamanatkan kurikulum Merdeka belajar. Oleh sebab itu selain kurikulum yang ada diperlukan juga ragam materi lain sebagai suplemen pembelajaran. materi softskill tentang Analisa kelayakan usaha khususnya pada produk IoT (Internet of Thing) perlu didapat oleh siswa karena ini menjadi salah satu contoh usaha yang mulai banyak digunakan dibidang telekomunikasi saat ini. Observasi awal yang dilakukan bahwa peserta Pengabdian kepada Masyarakat belum mendapatkan materi Analisa kelayakan usaha dengan contoh Produk IoT.Tujuan dari pelatihan ini adalah menambah khazanah keilmuan bagi siswa/siswa SMK Prudent School terkait entrepreneurship dengan lingkup materi pemahaman Break Event Point. Metodologi yang digunakan adalah dengan tiga Langkah cara. Pertama, observasi awal kebutuhan. Kedua, engagement stakeholder. Ketiga, Langkah terakhir implementasi dan evaluasi. Hasil dari pelatihan ini menunjukkan para peserta mendapat peningkatan pemahaman dalam melakukan analisa kelayakan usaha. Survei dengan skor 70,78 persen di akhir pelatihan menunjukkan angka yang tinggi untuk peserta yang baru mendapatkan materi Analisa kelayakan usaha.
Peningkatan Persentase Lebar Pita Antena 5G Substrate Integrated Waveguide dengan Slot Dumbbell ASTUTI, DIAN WIDI; TOGATOROP, SRI ARTHA; MUSLIM, MUSLIM; NATALI, YUS
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 12, No 3: Published July 2024
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v12i3.597

Abstract

ABSTRAKAntena Substrate Integrated Waveguide (SIW) konvensional memiliki lebar pita impedansi yang sempit. Penelitian ini mengusulkan perbaikan lebar pita impedansi antena SIW dengan mempergunakan slot dumbbell elips. Penempatan slot dumbbell elips menyebabkan bergabungnya dua mode TE SIW yang berdekatan. Gabungan dua mode TE SIW tersebut menyebabkan impedansi lebar pita menjadi lebih lebar dari sebelumnya. Hasil pengukuran lebar pita impedansi dari antena yang diusulkan memperlihatkan hasil yang sama persis dengan hasil simulasi yaitu sebesar 110 MHz pada rentang frekuensi 3,42 – 3,53 GHz. Desain frekuensi dari antena ini sesuai dengan frekuensi 5G yang diterapkan di Indonesia.Kata kunci: peningkatan persentase lebar pita, antena substrate integrate waveguide, slot dumbbell elips, dua frekuensi resonansiABSTRACTThe conventional Substrate Integrated Waveguide (SIW) antennas often exhibit a narrow impedance bandwidth. This research proposes an improvement in the impedance bandwidth of SIW antennas by utilizing dumbbell ellipsoidal slots. The placement of dumbbell ellipsoidal slots results in the coupling of two adjacent TE modes in the SIW. The combination of these two TE modes leads to a broader impedance bandwidth compared to the conventional design. The measured impedance bandwidth of the proposed antenna shows results consistent with simulation, specifically at 110 MHz within the frequency range of 3.42 to 3.53 GHz. This design frequency aligns with the 5G frequency range implemented in Indonesia.Keywords: bandwidth enhancement, substrate integrated waveguide antenna, dumbbell ellipsoidal slots, dual frequencies resonance
Komunikasi Cahaya Tampak untuk Model Sistem Pintu Otomatis Berbasis Internet of Things NATALI, YUS; R. F, NURWAN; NURHAYATI, ADE; RIZKY, M.; A, M. NABIL; M, MOSES; ROIHAN, M.; S, ALVA NURVINA; DORAND, PIETRA; SUYATNO, SUYATNO
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 12, No 4: Published October 2024
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v12i4.938

Abstract

ABSTRAKKomunikasi cahaya tampak (Visible Light Communication) merupakan solusi untuk komunikasi berkecepatan tinggi pada sistem berbasis Internet of Things. Model pintu otomatis berbasis IoT menggunakan komunikasi cahaya tampak berhasil dibuat untuk keamanan rumah. Komunikasi tersebut dengan panjang gelombang 650 nm berwarna merah diujicobakan untuk jarak 20 cm. Penerima fotodioda mengaktifkan motor servo untuk membuka pintu dengan maksimal sudut rotasi 120 derajat. Ada enam macam kondisi pintu terbuka yang ditampilkan di LCD dan dikirimkan melalui internet ke website. Secara keseluruhan sistem berjalan dengan baik. Komunikasi cahaya tampak juga diujicobakan sebagai sinyal pembawa dengan mendeteksi tegangan yang dikirimkan oleh laser di fotodioda. Berdasarkan ujicoba didapatkan data yang dikirimkan dapat diterima dengan baik, walaupun perubahan tegangan turun sampai dengan 1.5% di fotodioda.Kata kunci: komunikasi cahaya tampak (Visible Light Communication), Internet of Things, pintu otomatis, keamanan, sinyal pembawa ABSTRACTVisible Light Communication (VLC) is a solution for high-speed communication that can be utilized for Internet of Things (IoT) systems. An automatic door model based on IoT using VLC has been successfully assembled for user security at home. This communication, with a wavelength of 650 nm in red light, was tested for 20 cm. The photodiode receiver activates the servo motor to open the door with a maximum rotation angle of 120 degrees. The open door process consists of 6 different conditions displayed on the LCD and transmitted via the internet to the website. In a comprehensive evaluation, the system operates optimally. In addition, VLC was also tested as a carrier signal to examine the voltage sent by the laser. Based on the experiment, the data sent can still be received well, even though there is a voltage change up to 1.5% at the photodiode receiver.Keywords: Visible Light Communications (VLC), Internet of Things, automatic door, security, carrier signal
Quality Improvement on RoF 5G Fronthaul System Design at Millimeter-wave with EDFA and FBG Techniques APRIONO, CATUR; NUGROHO, SALSABILA SHITA PUTRI; NATALI, YUS
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 11, No 3: Published July 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v11i3.759

Abstract

ABSTRAKJaringan seluler terkini membutuhkan kapasitas tinggi dan latensi rendah di fronthaul yang dapat didukung oleh radio over fiber (RoF) dengan gelombang milimeter. Namun, dispersi merupakan salah satu masalah dalam menjaga kualitas transmisi. Penelitian ini mempelajari komponen EDFA dan FBG untuk meningkatkan kinerja transmisi pada sistem RoF gelombang milimeter menggunakan Optisystem for 5G fronthaul dengan mempertimbangkan faktor Q dan Bit Error Rate (BER). EDFA meningkatkan kinerja dengan kecepatan bit puncak 16 Gbps untuk 1 km, yang memenuhi standar fronthaul D-RAN. Peningkatan peningkatan menggunakan FBG untuk bit rate 16 Gbps memberikan kinerja yang lebih baik mulai dari jarak 4 km hingga 97,99 persen dibandingkan dengan konfigurasi tanpa FBG. Hal ini menunjukkan bahwa dispersi mempengaruhi kinerja sistem lebih dari redaman dilihat dari rata-rata perbedaan BER sebesar 6.6280e-04 ketika FBG ditambahkan dengan EDFA. Penelitian ini menunjukkan dua teknik telah meningkatkan kinerja sistem.Kata kunci: fiber, RoF, millimeter, fronthaul ABSTRACTAdvanced cellular networks need high capacity and low latency in fronthaul that can be supported by radio over fiber (RoF) with millimeter waves. However, dispersion is one problem in maintaining transmission quality. This research studies EDFA and FBG components to increase transmission performance in a millimeter wave-RoF system using Optisystem for 5G fronthaul by considering the Q factor and the Bit Error Rate (BER). EDFA improves performance with a 16 Gbps peak bit rate for 1 km, which meets D-RAN fronthaul standards. Improvement increase using FBG for a bit rate of 16 Gbps provided better performances starting from a distance of 4 km, up to 97.99 percent, compared to configurations without FBG. It shows that the dispersion influences the system performance more than the attenuation seen from the BER discrepancy average of 6.6280e-04 when the FBG is added with EDFA. This research indicates two techniques have improved the system's performance.Keywords: fiber, RoF, millimeter, fronthaul
DEVELOPING FINANCIAL LITERACY AMONG STUDENTS OF SMK TELKOM JAKARTA Rahmadi, Rahmadi; Natali, Yus; Cahyadi, Nanang; Hafiza, Lia; Sularso, Alva Nurvina
Multifinance Vol. 2 No. 1 (2024): Multifinance
Publisher : PT. Altin Riset Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61397/mfc.v2i1.185

Abstract

This community service aims to provide an understanding of effective financial management for students of SMK Telkom Jakarta. Students who are now included in the so-called Generation Z face considerable challenges. Starting from labor market competition to financial problems. So students must be equipped with additional skills for their financial management from an early age. In this activity, we apply the Workshop and Practical Training method. Workshop by providing basic knowledge about financial management. And practical training with the Kakeibo method (traditional Japanese method for managing finances). The results of this activity have an impact on students to care more about their finances, namely increasing financial awareness, and adopting good habits such as recording personal income and expenses.
Smart Home Security System Using Object Recognition with the EfficientDet Algorithm: A Real-Time Approach Suyatno, Suyatno; Natali, Yus; Reza Fachrurrozi, Nurwan; Roihan, Muhamad; Dorand, Pietra; Ghani, Naufal
International Journal of Engineering Continuity Vol. 4 No. 1 (2025): ijec
Publisher : Sultan Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58291/ijec.v4i1.400

Abstract

The EfficientDet method, which is implemented on the Raspberry Pi for real-time detection in resource-constrained contexts, is the basis for the smart home security system presented in this study.  The system integrates CCTV cameras, motion sensors, and detectors to identify and classify objects, sending notifications via WhatsApp via the Twilio API.  The EfficientDet-D0 model achieves an accuracy of 94.8%, an average processing time of 45 ms, and a memory usage of about 850 MB.  When compared to moving individuals or non-human things, testing shows that stationary human items have a higher detection accuracy.  Notifications are transmitted roughly every three seconds, with an average latency of 1.4 to 1.8 seconds.  The suggested method provides object recognition, real-time monitoring, and configuration flexibility in contrast to traditional IoT-based systems.  These results highlight the potential of EfficientDet as a reliable and adaptable solution for home security.  Future improvements include improving accuracy in a variety of environmental conditions and implementing adaptive learning.
Numerical and experimental state of identification battery pack lithium-ion Anggraeni, Dewi; Sudiarto, Budi; Nasser, Eriko Nasemudin; Hasbi, Wahyudi; Natali, Yus; Priambodo, Purnomo Sidi
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 4: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i4.pp2623-2633

Abstract

Two key indicators of a battery management system (BMS) are the state of charge (SoC) and the state of health (SoH). Accurately estimating SoC is important to prevent potential issues. Additionally, space, computing time, and cost are important factors in hardware development. To address these considerations, the first-order extended Kalman filter (EKF) and adaptive extended Kalman filter (AEKF) models were selected due to their simpler data pre-processing and better accuracy. The study recommends using the first-order equivalent circuit model (ECM) method in conjunction with the EKF and AEKF algorithms due to their straightforward setup and efficient computational process. Analysis of the charge-discharge cycles shows that the AEKF method consistently outperformed the EKF method regarding SoC accuracy. Moreover, when given different initial SoC values, the AEKF method displayed superior SoC estimation accuracy compared to the EKF method. Moreover, while the accuracy of the EKF is diminished, the error value remains below 2.5% for up to 500 cycles. Additionally, the shorter computing time of the EKF method is a consideration for practical real-world implementation. Furthermore, experiments conducted over 500 cycles revealed that SoH estimation declined from 99.97% to 76.1947%, suggesting that the battery has reached the end of life (EOL) stage.
Co-Authors A, M. NABIL Ade Nurhayati, Ade Alva Nurvina Sularso Anisa Nur Cahyani Budi Sudiarto Catur Apriono Dewi ANGGRAENI Dian Widi Astuti, Budi Irawan Prima Putra, Dian Widi Astuti, Ghani, Naufal Lia Hafiza Liestyowati Liestyowati M, MOSES Muslim Muslim Nabila Syadzwina Effendi Nanang Cahyadi Nasser, Eriko Nasemudin NUGROHO, SALSABILA SHITA PUTRI Nurwan Reza Fachrurrozi Pietra Dorand Purnomo Sidi Priambodo Rahmadi Rahmadi Rahmadi Rahmadi RIZKY, M. ROIHAN, M. Roihan, Muhamad S, ALVA NURVINA Suyatno Suyatno Suyatno Suyatno TOGATOROP, SRI ARTHA Wahyudi Hasbi