Garuda - Garba Rujukan Digital

TEKNIK ESTIMASI DAN KOMPENSASI GERAK PADA VIDEO CODING FGS (Fine Granularity Scalability) Agus Purwadi; Afrizal Yuhanef; Lince Markis
Elektron : Jurnal Ilmiah Vol 5 No 1 (2013): Elektron Jurnal Ilmiah
Publisher : Teknik Elektro Politeknik Negeri Padang

Motion estimation is a process to determine the movement of an object on video sequential. The movement of objects is known as motion vector. A motion vector indicates a shift point between the current frame with the reference frame. Of motion vector is obtained, it would seem that the movement of the dots between the observed frame. In this study using the algorithm block maching SAD (Sum of Absolute Different), the search process is done per pixel. To determine the quality of the movement of objects in each frame interpolation is obtained by calculating the PSNR value. PSNR values range from 35 to 40 dB. From the research conducted using the 90 frame interpolation obtained PSNR value decreases.

PENGUATAN SINYAL GLOBAL SYSTEM FOR MOBILE COMMUNICATION (GSM) 900 MHz MENGGUNAKAN ANTENA GRID Afrizal Yuhanef
Elektron : Jurnal Ilmiah Vol 5 No 1 (2013): Elektron Jurnal Ilmiah
Publisher : Teknik Elektro Politeknik Negeri Padang

The antenna is a device used to transmit or receive electromagnetic waves electromagnetic waves. Reception using an antenna will amplify the signal acquisition in accordance with the ability of the antenna itself. Service providers GSM (Global System Mobile), with the inclusion of the network limitations make the need for strengthening the acquisition of the signal is very large. Grid antenna is one option reinforcement signal acquisition. Grid antenna has a major component that is driven in the form of a dipole and a reflector which serves to reflect the signal beam. In this final project is designed, realized and measured at the antenna grid on GSM 900 MHz. This antenna is intended to be a media aids in strengthening the GSM signal reception to maximize the signal acquisition and connections

Aplikasi Sistem VoIP Menggunakan Smartphone pada Jaringan Wireless LAN Afrizal Yuhanef; Ramiati ramiati
Elektron : Jurnal Ilmiah Vol 6 No 1 (2014): Elektron Jurnal Ilmiah
Publisher : Teknik Elektro Politeknik Negeri Padang

Teknologi komunikasi suara sekarang ini telah banyak digunakan diberbagai lapisan masyarakat. Pada jaringan suara di perkantoran atau pemamfataan Sistem komunikasi berbasis LAN, pesawat telepon terhubung dalam jaringan Privat Automated Branch Exchange (PABX). Voice Over Internet Protocol (VoIP) adalah teknologi yang menawarkan telepon melalui jaringan Internet Protocol (IP). Penggunaan jaringan IP memungkinkan penekanan biaya pada sebuah perusahaan karena dalam penggunaanya tidak perlu membangun sebuah infrastruktur baru. Seperti tidak perlu lagi penambahan access telpon rumah/Privat Automated Branch Exchange (PABX). Penerapan atau implementasi dari rancangan yang telah dibuat, yaitu mulai dari menginstall sistem operasi dilanjutkan dengan konfigurasi, kemudian menginstall 3CX Phone System, 3CXPhone-1.3.4 dan mengkonfigurasikannya. Dilanjutkan dengan konfigurasi Wireless Access Point dan mengintegrasikan client VoIP dengan Voip Server yang dibangun.Wireless Acces Point yang digunakan sebagai media transfer data pada aplikasi sistem jaringan, mampu menjadi penghubung yang digunakan dalam layanan komunikasi suara melalui bantuan server VoIP berbasis Android. User Datagram Protocol (UDP) salah satu protokol yang paling banyak digunakan dalam komunikasi menggunakan VoIP. Teknologi VoIP berbasis Android dapat meminimalisir biaya operasional suatu perusahaan sehingga dapat berkomunikasi tanpa harus mengeluarkan biaya Pulsa berlebih dan biaya Penyewaan perangkat PABX.

The Small UWB Monopole Antenna with Stable Omnidirectional Radiation Pattern - Firdaus; Afrizal Yuhanef; Yulindon Yulindon; Dwiny Meidelfi; Meza Silvana
JOIV : International Journal on Informatics Visualization Vol 6, No 4 (2022)
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/joiv.6.4.972

Ultra Wideband (UWB) technology is an unmodulated wireless digital communication system that uses an extremely short duration pulse to transmit information bit. Because of this pulse, the UWB system needs a very wide bandwidth. Federal Communication Commission (FCC) has regulated the 3.1 – 10.6 GHz frequency spectrum for UWB. Since FCC released this frequency, many research in telecommunication have been done on UWB systems. One of them is a development of an Antenna that is suitable for UWB devices. UWB antenna characteristics require FCC band, omnidirectional radiation pattern, and compact size. In order to meet these needs, an antenna with a simple structure in the form of a monopole patch antenna with a similar patch size and ground width has been designed. The antenna is built on an FR4 – epoxy substrate material, with 4.4 dielectric constant and 1.6 mm thickness. The antenna feeding structure consists of two 100 Ω and 50 Ω lines with a wideband impedance matching scheme using tapered side and tapered transformers. The antenna design and optimization processes are conducted using electromagnetic simulation software, and measurements are carried out in an anechoic chamber. Simulation and measurement results show good agreement, and the antenna can work at frequencies 3.5 - 11.3 GHz with a gain of 1.5 – 3.25 dBi and stable omnidirectional radiation patterns. The antenna has dimensions of 27 × 8 × 1.6 mm, which are smaller than the antenna reported in the last research and suitable to be applied on various UWB devices.

Analysis of Handover Priority in Intra Technology Radio Access Afrizal Yuhanef; Zurnawita -; Fitri Amalia; Nasrul -; Ardi Syawaldipa
International Journal of Advanced Science Computing and Engineering Vol 5, No 1 (2023)
Publisher : SOTVI

A handover strategy is required to ensure connection continuity for cellular network users due to user mobility. Handovers on the same frequency (intra-frequency) and handovers on other frequencies (inter-frequencies) are conceivable in the Intra Radio Access Technology network. The network must be able to give the best quality and optimal bandwidth so that consumers can keep their connection. Most cells have more than one bandwidth channel. A test was performed in this study to determine the influence of priority handover on intra-frequency LTE handover on signal strength and throughput. This study is based on actual measurement findings from the deployed 4G LTE network transceiver device, which contains several carriers for each eNodeB. TEMS Pocket, a mobile gadget, was used to collect data for measurements. For analysis purposes, the parameters RSRP, throughput, frequency band, serving cell identification or PCI (Physical Cell Identity), and event handover are employed. In the inter-frequency LTE handover, there are two priority handovers: handovers from lower bands to higher bands (high priority) and handovers from higher bands to lower bands (low priority). When a low-priority handover happens, the RSRP value and throughput increase, while a high-priority handover causes the RSRP value to decrease.

Analisis Kualitas Throughput Jaringan 4G LTE Indosat Untuk Site 01JKS504 Di Kebayoran Lama, Jakarta Barat Afrizal Yuhanef; Sri Yusnita; Gilang Riandaisan
Jurnal Teknik Elektro Indonesia Vol 4 No 1 (2023): JTEIN: Jurnal Teknik Elektro Indonesia
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jtein.v4i1.396

Saat ini operator telekomunikasi masih melakukan upaya untuk meningkatkan kinerja layanannya. Salah satu metode untuk mengetahui kinerja layanannya ialah dengan melakukan pengukuran kualitas sinyal secara langsung atau biasa disebut drivetest. Drivetest ini dilakukan dengan cara mobility dan menggunakan metode Single Site Verification (SSV) yang dilakukan untuk menverifikasi setiap site apakah dalam kondisi bagus atau tidak. Throughput adalah jumlah informasi yang berhasil dikirim per satuan waktu. Physical Cell Identity (PCI) merupakan kode angka yang membedakan setiap cell atau sektor pada jaringan 4G LTE. Dalam penelitian ini pengukuran kualitas jaringan 4G LTE Indosat berdasarkan parameter Throughput dan PCI sebagai parameter utama yang diamati, lalu parameter SINR, RSRQ dan RSRP sebagai parameter pendukung. Pengukuran kualitas throughput jaringan 4G LTE Indosat untuk site 01JKS504 bisa dikatakan sangat bagus. Hal ini dapat dilihat dari nilai tiap parameter yang diperoleh dari drivetest. Pada parameter Throughput sudah memiliki nilai yang sangat bagus dengan indikator KPI berwarna biru(10.000 sampai 100.000 Kbps) untuk coverage area disekitar site. Pada parameter RSRP sangat baik (-80 sampai 0 dBm) dan RSRQ memiliki nilai yang sangat bagus dengan indikator KPI dominan berwarna biru(-10dB sampai 0 dB) untuk coverage area disekitar site. Pada parameter SINR memiliki nilai yang kurang bagus dengan indikator KPI berwarna kuning(0 sampai 13 dB) untuk coverage area disekitar site.

PERBANDINGAN KUALITAS JARINGAN 4G LTE ANTARA OPERATOR TELKOMSEL DAN TRI DENGAN MENGGUNAKAN METODE DRIVE TEST DI KECAMATAN NANGGALO Afrizal Yuhanef; Dikky Chandra; Isnurisi Isnurisi
Jurnal Media Elektro Vol 12 No 2 (2023): Oktober 2023
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v12i2.12482

Nanggalo Subdistrict is one of the sub-districts located in the city of Padang, West Sumatra Province. The advantages of data transfer speeds owned by 4G Long Term Evolution (LTE) make telecommunications operators compete with each other to provide the best service quality, but there is still a decrease in network quality in the Nanggalo District area at Telkomsel and Tri operators. So it is necessary to do a drive test to measure and find out the network quality of the two operators. Measuring the quality of a 4G network with RSRP, SINR, and Throughput parameters and how to retrieve data is a benchmark. The software used is TEMS Pocket to take measurement data during the drive test, TEMS Discovery Software to process the data of the test drive results. The comparison results were obtained in Nanggalo District for Tri operator to have better network quality, which can be seen in the SINR parameter has a percentage value of 43.17% and Throughput with a percentage value of 83.56% while Telkomsel operator have a SINR value with a percentage of 17.58% and throughput with a percentage value of 36.59%.

Analisis Kualitas Jaringan 4G LTE: Studi Kasus antara Telkomsel dan Tri Melalui Metode Drive Test Afrizal Yuhanef; Dikky Chandra; Isnurisi Isnurisi
Emitor: Jurnal Teknik Elektro Vol 23, No 2: September 2023
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v22i2.22819

Nanggalo Subdistrict is one of the sub-districts located in the city of Padang, West Sumatra Province. The advantages of data transfer speeds owned by 4G Long Term Evolution (LTE) make telecommunications operators compete with each other to provide the best service quality, but there is still a decrease in network quality in the Nanggalo District area at Telkomsel and Tri operators. So it is necessary to do a drive test to measure and find out the network quality of the two operators. Measuring the quality of a 4G network with RSRP, SINR, and Throughput parameters and how to retrieve data is a benchmark. The software used is TEMS Pocket to take measurement data during the drive test, TEMS Discovery Software to process the data of the test drive results. The comparison results were obtained in Nanggalo District for Tri operator to have better network quality, which can be seen in the SINR parameter has a percentage value of 43.17% and Throughput with a percentage value of 83.56% while Telkomsel operator have a SINR value with a percentage of 17.58% and throughput with a percentage value of 36.59%.

PERBANDINGAN KUALITAS JARINGAN 4G LTE ANTARA TIGA OPERATOR MENGGUNAKAN METODE DRIVE TEST DI PANTAI PARIAMAN TENGAH Afrizal Yuhanef; Siska Aulia; Oktarina Permata Yaseva
JURNAL INFORMATIKA DAN KOMPUTER Vol 7, No 2 (2023): SEPTEMBER 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat - Universitas Teknologi Digital Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26798/jiko.v7i2.886

Kawasan Pantai Pariaman Tengah memiliki potensi pada sektor pariwisata yang bernilai tinggi dengan jumlah pengguna layanan telekomunikasi yang semakin meningkat. Oleh karena itu, penting untuk menilai kualitas jaringan 4G LTE (Long Term Evolution) dari operator yang tersedia di kawasan tersebut. Penelitian ini dilakukan untuk menguji performasi kualitas jaringan pada tiga jenis operator, yaitu Telkomsel, XL Axiata, dan H3I dengan metode drive test yang menggunakan Iddle Mode dan software TEMS Pocket. Parameter kualitas jaringan yang dinilai adalah RSRP (Received Signal Reference Power), RSRQ (Received Signal Reference Quality), dan SINR (Signal to Interference and Noise Ratio). Adapun persentase yang termasuk dalam kategori diatas normal atau dalam range hijau dan biru dijumlahkan dan kemudian dibandingkan antara ketiga operator. Berdasarkan hasil analisis, jumlah persentase RSRP dari operator Telkomsel 80,87% vs XL Axiata 84,51% vs H3I 82,57%; persentase RSRQ dari operator Telkomsel 94,53% vs XL Axiata 91,62% vs H3I 99,78%; dan persentase SINR dari operator Telkomsel 39,63% vs XL Axiata 36,04% vs H3I 32,03%. Sehingga jika dibandingkan antara ketiga operator dapat disimpulkan bahwa nilai RSRP yang paling baik ditemukan pada operator XL Axiata, nilai RSRQ yang paling baik ditemukan pada operator H3I, sedangkan nilai SINR paling baik ditemukan pada operator Telkomsel.

New site Power Transmitter Analysis of 4G LTE FDD 1800 MHz Using Cell Splitting Method Afrizal - Yuhanef; Sri Yusnita; Rifki Wafi
Jurnal Edukasi Elektro Vol 7, No 2 (2023): Jurnal Edukasi Elektro, Volume 7, Nomor 2, 2023
Publisher : JPTE FT UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jee.v7i2.64246

The advancement of cellular telecommunications is growing day by day. Some theories, including 4G LTE FDD 1800 MHz, are becoming irrelevant to the current technology. The theory of power reduction by the cell splitting method is unsuitable for the actual condi-tions in the field. Theoretically, the cell splitting method is carried out on a new site with half of the main site's coverage, in which the transmitter power at the split site is reduced by 12 dB from the main site. This results in the power generated from the calculation be-ing small so that service coverage is limited. This study aimed to test the theory of trans-mitter power reduction in the cell splitting method (scenario 1) and compare it with other power reduction scenarios (Scenario 1: reduced by 15 dB, and Scenario 2: reduced by half from the main site power). The analysis is done by conducting simulations using Atoll RF Planning software. The study results revealed that in Scenario 3, the value of Key Perfor-mance Indicators is better than in other scenarios. The average throughput is 11045 kbps, the RSRP value is -108.58dBm, the range is 1.045 Km, and the average SINR is reduced to 8.52 dB. In addition, the data revealed that the coverage and signal quality of the site cell splitting is better when the transmitter power is 43 dBm (scenario 3). In conclusion, a site with higher transmitter power tends to have better signal strength, quality, and speed, as well as a wider coverage area. Reducing the transmitter cell splitting power will be more effective by reducing the new power site to half of the main site.

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