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All Journal ELKHA : Jurnal Teknik Elektro Bulletin of Electrical Engineering and Informatics Jurnal Teknik Elektro Jurnal Informatika dan Teknik Elektro Terapan Jurnal Teknoinfo Jurnal Elektronika dan Telekomunikasi Journal of Engineering and Scientific Research (JESR) Indonesian Journal of Electrical Engineering and Computer Science Jurnal Pengabdian Kepada Masyarakat Ungu ( Abdi Ke Ungu) International Journal of Aviation Science and Engineering Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Electrician : Jurnal Rekayasa dan Teknologi Elektro Jurnal Rekayasa elektrika Nusantara Journal of Computers and its Applications Applied Engineering, Innovation, and Technology Nemui Nyimah
Misfa Susanto
Department Of Electrical Engineering, Faculty Of Engineering, University Of Lampung, Jl.Prof. Sumantri Brojonegoro No. 1, Bandar Lampung 35145
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Public Health Transportation Other

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Interference management based on clustering in RIS-aided ultra dense network under multicell scenario Susanto, Misfa; Gumilang, Alisha Gita; Fitriawan, Helmy; Aziz, Azrina Abd
Bulletin of Electrical Engineering and Informatics Vol 14, No 4: August 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i4.9495

Abstract

Ultra dense network (UDN) and reconfigurable intelligent surface (RIS) are two latest technologies in encountering the increasing demands for network capacity and quality of service in wireless cellular networks. UDN is created by densely deploying femtocells in macrocells area. It causes complex interferences because distances among femtocells are likely very close. RIS provides solution in regulating the reflection of the signal emitted from the transmitter to the receiver to resolve the obstacles. However, RIS reflects the interference signals as well causing more complex interference problems. This paper proposes a solution using clustering method as interference management in RIS-aided UDN network. By clustering method, nearby femtocells are grouped and allocated different frequency channels among femtocells in a cluster. The performance of two systems–the baseline system and the one employing a clustering method–is evaluated based on signal to interference plus noise ratio (SINR), throughput, and bit error rate (BER). Simulation results indicate that SINR and throughput improved by 1.57% and 1.73%, respectively. Meanwhile, the BER for the baseline system is 5.78×10-8 and decreased when applying the proposed method system with a value of 2.26×10-8. The proposed clustering method is promising to confront the interference problems.
Clustering technique for dense D2D communication in RIS-aided multicell cellular network Susanto, Misfa; Sabella, Soraida; Hakim, Lukmanul; Kurnianto, Rudi; Abd Aziz, Azrina
Indonesian Journal of Electrical Engineering and Computer Science Vol 39, No 2: August 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v39.i2.pp927-940

Abstract

Device-to-device (D2D) communication and reconfigurable intelligent surface (RIS) are well-known as two promising technologies for nextgeneration cellular communication networks. D2D users operate on the same spectrum as traditional cellular users, potentially leading to increased interference and reduced efficiency in frequency resource usage. RIS provides a remedy for clearing blocked signals from obstructions by reflecting the desired signals to the intended receiver. However, RIS elements reflect not only the desired signals but also the interference signals. This paper proposes a distance-based clustering method aimed at creating a grouping algorithm for neighboring D2D users using different channels, thereby reducing co-channel interference. The simulation indicates that the proposed clustering method for D2D users' equipment (DUEs) leads to a 0.72 dB increase in signal-to-interference-plus-noise ratio (SINR), enhances throughput to 11.25 Mbps, and reduces the bit error rate by up to 24×10⁻² compared to the baseline system. The study findings also indicate that cellular users' equipment (CUEs) experience satisfactory signal quality, even with the presence of DUEs on the cellular network. Our clustering algorithm is feasible to deploying D2D densely in RIS-aided cellular network without significantly affecting CUE performance.
Evaluation of RSSI-Based Distance Estimation with ESP32 BLE Modules for Indoor Asset Tracking Al-Maktary, Omar; Susanto, Misfa; Mardiana, Mardiana
ELKHA : Jurnal Teknik Elektro Vol. 17 No.2 October 2025
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v17i2.97739

Abstract

Bluetooth Low Energy (BLE) is a technology used for asset tracking, offering low power consumption and compatibility with embedded systems such as the ESP32. This paper evaluates the accuracy and reliability of Received Signal Strength Indicator based distance estimation using ESP32 BLE modules in three environmental conditions: clear line-of-sight, wall obstruction, and mobile tracking. It presents an empirical analysis of ESP32-specific RSSI limitations across these scenarios. The log-distance path loss model was employed, using a reference RSSI of -47 dBm at 1 meter and a path loss exponent of 2. Experiments were conducted with a BLE tag device (Asset_Tag_01) broadcasting BLE signals, while an ESP32 reader device collected RSSI data via Arduino IDE. Results indicate reliable estimation within 4 meters with under 25% error in line-of-sight conditions. However, beyond 5 meters, particularly in obstructed environments, RSSI values fluctuated significantly, causing distance overestimation. Wall obstructions resulted in an immediate 6 dBm signal degradation at just 1 meter. Packet loss increased from 0% at short distances to 50% at 8.5 meters. In mobile tracking, signal strength showed sudden jumps, complicating movement detection. These findings highlight that RSSI alone is not reliable for precise tracking. To improve accuracy, particularly in real-world settings like healthcare or industrial environments, further studies should explore advanced methods like Kalman filtering combining data from multiple sensors.
ANALISA PERBANDINGAN DUA METODE KALIBRASI MESIN ANASTHESI VENTILATOR MELALUI PENGUJIAN FUNGSIONAL DAN KALIBRASI Muzaki, Teguh; Susanto, Misfa; Purwiyanti, Sri
Jurnal Informatika dan Teknik Elektro Terapan Vol. 12 No. 3 (2024)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v12i3.4386

Abstract

Ventilator merupakan mesin yang berfungsi untuk menunjang pernapasan. Alat ini umumnya dibutuhkan  pasien yang tidak dapat bernapas sendiri. Mesin ini mengatur proses menghirup dan menghembuskan nafas pada pasien. Banyak kendala dengan hasil pengujian dan kalibrasinya yang tidak sesuai. Hal ini dikarenakan ketidaktahuan terhadap metode pengujian dan kalibrasi ventilator yang sesuai standar. Tujuan penelitian ini untuk melakukan pengujian dua metode kalibrasi yaitu kalibrasi mandiri dan kalibrasi pihak ke dua mesin anastesi ventilator pengujian di lakukan dengan cara pengamatan fisik dan uji fungsi alat, pengukuran keselamatan listrik dan melakukan kinerja kalibrasi sesuai dengan nilai standar dari metode kerja kalibrasi alat medis4. Menganalisa dan membandingkan kedua metode serta mencari En dan mendapati metode yang mana yang layak di gunakan untuk kinerja alat seterusnya. Hasil peneitian ini menunjukan bahwa : 1) Perbedaan hasil  perhitungan   antara   metode kalibrasi pihak ke 2 dan kalibrasi mandiri dikarenakan penggunaaan yang berbeda di setiap pengujian maupun alat pendukung yang digunakan.  Berdasarkan perhitungan dari Error Number, Untuk metode kalibrasi mandiri dapat digunakan didalam proses pengambilan data karena dibeberapa kondisi tertentu ada diantara Error Number yang masuk nilai ambang batas dan dalam jangka pemakaian yang terbatas hanya sampai 6 bulan, karna kondisi alat penunjang dan kesetabilan listrik di rumah sakit sangat berpengaruh pada alat tsb. 2) Perbandingan repeatability kedua metode banyak sekali terjadi perbedaan yang signifikan, Contoh pada satu metode kalibrasi mandiri pada setting tidal volume yang mendapat nilai repeatability yang presisi akurasi pada pengukuran nya pada percobaan 1 : -23,6, percobaan 2 : 14,2 dan percobaan 3 : -15,2 menunujukan pengulangan yang baik antara jarak percobaan 1 , 2 sampai 3. Naik turun nya kondisi tersebut di akibatkan kondisi flow sensor dan o2 sensor yang melebihi batas pemakaian. Begitupun dengan percobaan respiration rate metode kalibrasi mandiri yang mendapat nilai repeatability hampir mendekati presisi yaitu di 5,56% . 
SNR Gain Evaluation in Narrowband IoT Uplink Data Transmission with Repetition Increment: A Simulation Approach Hamdani, Fadil; Susanto, Misfa; Sigwele, Tshiamo
Journal of Engineering and Scientific Research Vol. 5 No. 1 (2023)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v5i1.160

Abstract

Deploying Internet of Things (IoT) on a large scale necessitates widespread network infrastructures supporting Machine Type Communication. Integrating IoT into cellular networks like LTE, known as Narrowband-IoT (NB-IoT), can fulfill this infrastructure need. Standard 3GPP Release 13 introduces NB-IoT's Repetition features, expanding radio transmission coverage while maintaining LTE performance. Focusing on uplink data traffic, this study examines NB-IoT's repetition mechanism, grid resource distribution, and NPUSCH performance through simulations. Results show that at SNR greater than -5 dB, maximum repetitions of 128 yield the highest BLER, while minimum repetitions of 2 result in the lowest. Quadrupling repetitions increases SNR by 5 dB, emphasizing repetition's role in error mitigation and uplink reliability, especially in challenging SNR conditions. For optimal throughput in SNR above -5 dB, maximum repetitions of 128 for NPUSCH format 1 are recommended. These findings underscore the importance of repetition in enhancing Narrowband IoT performance, offering insights for system optimization, where increasing the number of repetitions generally leads to higher SNR gain. The attained BLER and throughput values from Narrowband IoT simulations highlight the robustness of data transmission across varying channel conditions, affirming NB-IoT applicability to a wide range of IoT applications.
PELATIHAN PROGRAM BANTU SIMULASI BIDANG ELEKTRONIKA BAGI SISWA SMA NEGERI 9 BANDAR LAMPUNG Setyawan, F.X. Arinto; Susanto, Misfa; Permata, Diah; Sitorus, Henri BH
Nemui Nyimah Vol. 1 No. 1 (2021): Nemui Nyimah
Publisher : FT Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/nm.v1i1.7

Abstract

Elektronika bukanlah mata pelajaran wajib di SMA. Biasanya pengetahuan dasar di bidang elektronika ini disampaikan dalam mata pelajaran fisika. Pengetahuan mengenai elektronika sebenarnya sangat penting untuk diberikan kepada siswa karena sebagian besar peralatan saat ini menggunakan teknologi ini. Peralatan elektronik ini dipergunakan hampir disemua bidang kehidupan manusia sehingga memudahkan manusia dalam beraktivitas. Ketiadaan alat praktik yang memadai karena mahalnya harga peralatan-peralatan alat ukur elektronik seperti multimeter dan osiloskop serta biaya pembelian komponen-komponen elektronik yang sangat mudah rusak karena pemakaian merupakan alasan mengapa pengetahuan ini tidak dapat diberikan sejak dini. Pengabdian ini memberi solusi bagaimana cara mengatasi kekurangan ketiadaan alat ukur dan komponen elektronik yang dibutuhkan untuk praktik. Pengabdian ini memberikan pelatihan cara menggunakan program bantu simulasi komputer untuk memahami teori elektronika dan dapat melakukan pratik secara multimedia. Program simulasi yang diberikan adalah Proteus. Keberhasilan pelatihan diukur berdasarkan peningkatan nilai pre-test dengan post-test. Soal pre-test diberikan sebelum dilakukan pelatihan dan soal post-test diberikan setelah pelatihan. Pada pengabdian ini terjadi peningkatan pengetahuan peserta mengenai penggunaan program bantu simulasi bidang elektronika. Keberhasilan peningkatan pengetahuan diindikasikan dari peningkatan nilai rata-rata pre-test yang semula sebesar 2,68 menjadi 6,84 pada post-test atau terjadi peningkatan nilai sebesar 4,16. Jumlah peserta pada pengabdian ini adalah sejumlah 25 orang siswa SMA Negeri 9.
Co-Authors A Naveed Abd Aziz, Azrina Al-Maktary, Omar Alizal, Muhammad Anwar, Hasrul Arjmand Naveed Aziz, Azrina Abd Diah Permata G Mohi-Ud-Din Gumilang, Alisha Gita Hamdani, Fadil Hasim, Sitronella Nurfitriani Helmy Fitriawan Helmy Fitriawan Heriansyah Hu, Yim-Fun Lukmanul Hakim M Ali M Kamala M. Ridho Ulya MARDIANA Mardiana Mardiana Mardiana Mardiana Matsna Nurul Kholidah Matsna Nurul Kholidah MUHAMMAD ALI Muhammad Irsyad Muzaki, Teguh Naveed, Arjmand Pradana Marlando, Pradana Rudi Kurnianto Sabella, Soraida Setyawan, FX Arinto Sigwele, Tshiamo Sitorus, Henri BH Sitronella Nurfitriani Hasim Sri Purwiyanti T Sigwele T Sigwele Widodo, Ahmad Wahyu Y F Hu Yim Fun Hu Yudianto Yudianto