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All Journal International Journal of Electrical and Computer Engineering IAES International Journal of Artificial Intelligence (IJ-AI) TEKNIK Transmisi: Jurnal Ilmiah Teknik Elektro JURNAL SISTEM INFORMASI BISNIS Jurnal Penelitian dan Pengembangan Pendidikan TRANSIENT: Jurnal Ilmiah Teknik Elektro Journal of Information System Jurnal Teknologi dan Sistem Komputer Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Indonesian Journal of Electrical Engineering and Computer Science Scientific Journal of Informatics
Wahyul Amien Syafei
Departemen Teknik Elektro, Universitas Diponegoro Semarang Jl. Prof Sudharto, SH, Kampus UNDIP Tembalang, Semarang 50275, Indonesia
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering

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Journal : TEKNIK

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Pengembangan Perangkat Lunak Untuk Gerbang Tol Otomatis Yang Ramah Lingkungan Berbasis RFID Dengan Notifikasi Pembayaran Tanpa Kertas Syafei, Wahyul Amien; Listyono, A. F.; Prayogi, A. S.; Darjat, Darjat; Hidayatno, Achmad
TEKNIK Vol 40, No. 1 (2019): Mei 2019
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2276.759 KB) | DOI: 10.14710/teknik.v39i3.22829

Abstract

Penelitian ini bertujuan untuk mengembangkan purwarupa sistem gardu tol yang ramah lingkungan. Sistem ini menggunakan teknologi RFID untuk mengidentifikasi pengguna sebagai pengganti kartu debit. Kendaraan diidentifikasi oleh sistem ketika melewati gardu tol. Pembayaran dilakukan tanpa perlu memberhentikan kendaraan. Notifikasi pembayaran dikirim melalui SMS secara otomatis oleh sistem ke telepon genggam pengguna. Purwarupa ini dirancang untuk mengeliminasi antrean dan sampah kertas di gardu tol sehingga menghemat waktu, bahan bakar, biaya penyediaan kertas dan tinta. Paper ini menyajikan pengembangan perangkat lunak dari sistem gardu tol otomatis ramah lingkungan yang diusulkan.
OPTIMASI POSISI PILOT MENGGUNAKAN ALGORITMA GENETIKA UNTUK MENINGKATKAN KINERJA Wi-Fi 802.11n Syafei, Wahyul Amien; Nasution, Yunda Kumala; Sukiswo, Sukiswo
TEKNIK Volume 34, Nomor 3, Tahun 2013
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (300.849 KB) | DOI: 10.14710/teknik.v34i3.6984

Abstract

Wi-Fi is wireless communication technology that  used widely not only for accessing the internet but also communicating data, image, voice and video. The newest wi-fi technology is 802.11n as an extention of 802.11a/b/g. By  combining OFDM and MIMO techniques it can provide throughput up to 600Mbps. One of important factors to achieve such high throughput is the pilot position in training sequence. Wi-fi802.11n allocates it’s pilots orthogonally. This research optimizes the pilot location using Genetic Algorithm Differential Evolution. Optimum pilot position improves the accuracy of synchronization which leads to enhance the performance. The invented optimum pilot position set then be implemented into wi-fi 802.11n simulator to be analyzed the performance enhancement which represented in grafic BER vs SNR curve.Run test under channel model B and D proof that the invented optimum pilot position gives performance enhancement of 0,5 dB and maintain it’s stability compared towi-fi 802.11n system with  set ortogonal pilot position.
Evaluation of High-Performance Interference Canceller to Boost the Error Performance of The Wi-Fi 5 IEEE 802.11ac Syafei, Wahyul Amien; Hidayatno, Achmad; Nurhayati, Oky Dwi; Nugraheni, Dinar
TEKNIK Vol. 45, No. 1 (2024): May 2024
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v45i1.60252

Abstract

The Wi-fi 5 IEEE 802.11ac can achieve throughput up to 6,933 Mbps by occupying 160MHz of bandwidth in each eight spatial streams with 256-QAM. It provides not only very high throughput but also high performance of wireless communications. However, due to the use of multiple antennas at both transmitter and receiver side which operate in the same frequency band; it experiences many interference signals. Therefore, a high-performance interference canceller is highly required to cancel these interferences and get the desired information back. The conventional interference cancellers are based on linear method, i.e. zero forcing and minimum mean square error. Both are simple but low in performance. This paper presents evaluation of a high-performance interference canceller based on maximum likelihood detection to boost the error performance of the wi-fi 5. Run test under in-door channel model demonstrates the superiority of this interference canceller. For target bit error rate of 10-4, it dramatically boosts the error performance by 16 dB and 17,5 dB compared to linear methods by the cost of very high complexity.
Air Pollution Control Analysis at the Tofu Industry Center in Sugihmanik Village, Grobogan Regency Huboyo, Haryono Setiyo; Ramadan, Bimastyaji Surya; Undari, Melinda Tri; Fauziyah, Fitria Umi; Syafei, Wahyul Amien; Jassey, Babucarr
TEKNIK Vol 46, No 2 (2025) April 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i2.70130

Abstract

Air pollution in Grobogan Regency, especially particulate parameters, annually shows an average value of 69% of ambient air quality standards with an average concentration of PM2.5 reaching 38 μg/m³, primarily due to industrial activities, transportation, and the burning of fossil fuels. In the Sugihmanik Village Tofu Industrial Centre, Grobogan Regency, there are 30 home-based tofu SMEs that use rice husks as fuel for boiler furnaces, which produce pollutants such as SO₂, NO₂, CO₂, CO, PM₂.₅, PM₁₀, and TSP. The largest tofu factory in Sugihmanik Village uses 400 kg of rice husks daily. The chimney design, which does not comply with the technical standards of Kepdal No. 205 of 1996, further increases the risk of air pollution. Therefore, the design of an air pollution control device and a chimney redesign are required to mitigate these negative effects. After calculating the emission concentrations and comparing them with PermenLH No. 7 of 2007, only total particle parameter close to the quality standard of 350 mg/m3 with a particulate loading emitted from the furnace of 232 mg/s. By using a cyclone as an emission control device, there is a particulate removal efficiency of 53.05%. With the implementation of air pollution control devices, the ambient air concentration of particulates, previously a peak concentration of around 300 µg/m3, can be reduced to around 68.8 µg/m3.
Co-Authors Achmad Hidayatno Adi Wibowo Adi Wibowo Adian Fatchur Rochim Afiq, Raihan Aghus Sofwan Ahmad Siddik Prayogi, Ahmad Siddik Ajub Ajulian Zahra Macrina Amelia Syarfina Qisthi Anky Setyadewa Ardea Satya Hasnanta Ardian Wijaya Aulia Iqbal M Baharuddin, Yusuf Bayu Surarso Bayu Surarso Budi Warsito Darjat Darjat Dinar Mutiara Kusumo Nugraheni Dionis Balan Pratama Durio Etgar Endriawan Endriawan Farich Novriana Sandy Farid Arifiyanto Fatkhurrahman, Muhammad Arief Faudin, Arif Nur Fauziyah, Fitria Umi Fuad Rajab Nugroho Galoh Randicha Haryono Setiyo Huboyo Hayu Pratista Herlinah Baharuddin, Herlinah Hiroshi Ochi Imam Ahmad Ashari, Imam Ahmad Imam Santoso Indra Jaya Indra Jaya Jack Zijlmans Jassey, Babucarr Joanna Francisca Socaningrum Juwanda, Farikhin Kodrat Imam Satoto Kusnadi Kusnadi Laksono Trisnantoro Listyono, A. F. M. Solehuddin Maman Somantri Muhammad Alfian, Muhammad Muhammad Satriya Utama Nugraheni, Dinar Oky Dwi Nurhayati Prayogi, A. S. R. Edith Indera Bagaskara R. Rizal Isnanto Rahmat Gernowo Ramadan, Bimastyaji Surya Raymond Octhario Retno Kusumaningrum Rini Indah Sulistiyawati Rini Nuraini Rini Nuraini, Rini Santoso, Imam Sri Mulyono Subchan Ajie Ari Bowo Sukiswo Sukiswo Sulistiyo, Budi Tri Murwanto Undari, Melinda Tri Valentina Samaya Sari Dewi Yama Aryadanangjaya Yudhitya Sorrenti Yuli Chritiyono Yunda Kumala Nasution Zhaorui Yuan Zuhrotul Maulida