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All Journal GEMA TEKNOLOGI Jurnal IPTEK Techne : Jurnal Ilmiah Elektroteknika Journal of Robotics and Control (JRC) Journal of Applied Smart Electrical Network and System (JASENS) Jurnal Jaringan Telekomunikasi JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga) AJAD : Jurnal Pengabdian kepada Masyarakat
Rakhmania, Amalia Eka
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Aerospace Engineering Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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KINERJA ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS (OFDMA) PADA TEKNOLOGI RADIO OVER FIBER (ROF) Rakhmania, Amalia Eka; Pramono, Sholeh Hadi; Kurniawan, Dwi Fadila
Gema Teknologi Vol 20, No 3 (2019): April 2019 - October 2019
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (382.798 KB) | DOI: 10.14710/gt.v20i3.25779

Abstract

Amalia Eka Rakhmania, Sholeh Hadi Pramono, Dwi Fadila Kurniawan, in this paper explain that radio over Fiber (RoF) is a technology that integrates wireless and wireline transmission system to transmit radio signal through optical fibre cable. This paper evaluates the performance of Orthogonal Frequency Division Multiple Access (OFDMA) implemented in RoF system for mobile WiMAX network. RoF channel model includes both optical fiber with Relative Intensity Noise, shot noise, thermal noise, and chromatic dispersion, and also wireless channel with Additive White Gaussian Noise (AWGN). Through simulation, signal to noise ratio (SNR), channel capacity, bit rate, and bit error rate (BER) with the influence of optical fiber length and wavelength. Result shows that optical fiber length is proportional to SNR, channel capacity, and bit rate but inversely proportional to BER. 1550 nm wavelength has better channel capacity but lesser bit rate than 1310 nm.
Sistem Monitoring Keberadaan Pengunjung Pariwisata Secara Realtime Dengan Metode Wireless Network Clustering Taufik, Mochammad; Hudiono, Hudiono; Rakhmania, Amalia Eka; P, Ridho Hendra Yoga
Jurnal IPTEK Vol 23, No 2 (2019)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2019.v23i2.516

Abstract

Di era saat ini, perkembangan teknologi sangat pesat, termasuk di bidang pariwisata. Salah satu hal utama yang menjadi perhatian di bidang pariwisata adalah kenyamanan pengunjung, yang dipengaruhi oleh faktor keamanan, terutama keamanan anak-anak. Masalah yang sering terjadi adalah terpisahnya anak dengan keluarganya di tengah keramaian pengunjung pariwisata. Sistem monitoring yang dapat memantau posisi anak-anak merupakan solusi dari permasalahan ini. Sistem monitoring yang diajukan menggunakan metode wireless network clustering dan terdiri dari perangkat statis node, mobile node danserver. Mobile node merupakan perangkat yang dibawa oleh pengunjung anak-anak yang berfungsi mengirimkan data posisi secara realtime ke statis node menggunakan modul transmisi RF HC-12, sedangkan statis node berfungsi sebagai penangkap pancaran dari mobile node, yang kemudian mengirimkan data pada server untuk kemudian ditampilkan di perangkat android yang dibawa oleh orang tua atau keluarganya. Hasil pengujian menunjukkan bahwa data dapat dikirim dengan optimal ketika pengaturan RF HC-12 menggunakan daya transmisi 20 dBm dan posisi antenna spring vertikal. Statis node dipasang dengan jarak 15 meter satu sama lain, sesuai dengan radius maksimal pengiriman data RF HC-12. Akurasi yang didapat mencapai 92% dengan 1000 kali percobaan pengiriman data. 
Wireless Intelligent Power Switch berbasis Wireless Sensor Network Yoga Perdana, Ridho Hendra; Rakhmania, Amalia Eka; Hariyadi, Aad
Jurnal IPTEK Vol 24, No 1 (2020)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2020.v24i1.644

Abstract

Increasing demand for electricity also implies a rise in conventional energy use, and by using conventional energy, leading to disadvantages such as being environmentally unfriendly as a result of fossil fuel use. The system to be researched is a wireless intelligent power switch. The system will be created using 2 types of resources and each load will be linked to a switch to determine the power distribution. The power distribution decision making involves an artificial intelligence-based on backpropagation neural network. The results of the comparison between the outcomes of Matlab simulation and the anticipated target showed excellent outcomes after testing the system, with accurate 94.3% and delay transmission 5 – 10 second.
Online Digital Image Stabilization for an Unmanned Aerial Vehicle (UAV) Rahmaniar, Wahyu; Rakhmania, Amalia Eka
Journal of Robotics and Control (JRC) Vol 2, No 4 (2021): July (Forthcoming Issue)
Publisher : Universitas Muhammadiyah Yogyakarta

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Abstract

The Unmanned Aerial Vehicle (UAV) video system uses a portable camera mounted on the robot to monitor scene activities. In general, UAVs have very little stabilization equipment, so getting good and stable images of UAVs in real-time is still a challenge. This paper presents a novel framework for digital image stabilization for online applications using a UAV. This idea aims to solve the problem of unwanted vibration and motion when recording video using a UAV. The proposed method is based on dense optical flow to select features representing the displacement of two consecutive frames. K-means clustering is used to find the cluster of the motion vector field that has the largest members. The centroid of the largest cluster was chosen to estimate the rigid transform motion that handles rotation and translation. Then, the trajectory is compensated using the Kalman filter. The experimental results show that the proposed method is suitable for online video stabilization and achieves an average computation time performance of 47.5 frames per second (fps).
Mobile Robot Path Planning in a Trajectory with Multiple Obstacles Using Genetic Algorithms Rahmaniar, Wahyu; Rakhmania, Amalia Eka
Journal of Robotics and Control (JRC) Vol 3, No 1 (2022): January
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jrc.v3i1.11024

Abstract

Path planning is an essential algorithm to help robots complete their task in the field quickly. However, some path planning algorithms are computationally expensive and cannot adapt to new environments with a distinctly different set of obstacles. This paper presents optimal path planning based on a genetic algorithm (GA) that is proposed to be carried out in a dynamic environment with various obstacles. First, the points of the feasible path are found by performing a local search procedure. Then, the points are optimized to find the shortest path. When the optimal path is calculated, the position of the points on the path is smoothed to avoid obstacles in the environment. Thus, the average fitness values and the GA generation are better than the traditional method. The simulation results show that the proposed algorithm successfully finds the optimal path in an environment with multiple obstacles. Compared to a traditional GA-based method, our proposed algorithm has a smoother route due to path optimization. Therefore, this makes the proposed method advantageous in a dynamic environment.
RFID as Automatic Billing System on Smart Cart Based on Wireless Sensor Network at Clothing Store Aulia, Hillyatul; kusumawardani, Mila; Rakhmania, Amalia Eka
Jurnal Jaringan Telekomunikasi Vol 13 No 3 (2023): Vol. 13 No. 03 (2023) : September 2023
Publisher : Politeknik Negeri Malang

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Abstract

The current billing system can only be done at the cashier by relying on human resources. So that it can increase the number of queues when consumers increase and purchase more than one product. Longer queues can waste time and energy so that it can reduce customer satisfaction. The billing process that can only be done at the cashier can also be an obstacle for customers in knowing the total bill when shopping. This can trigger an over budget so that customers have to increase their expenses. This research proposes an automatic billing system on a smart cart that can support the billing process, especially reading the total bill in real time. This system uses a Radio Frequency Identification (RFID) passive label attached to each product as a unique identification code. In the shopping cart there is an RFID reader that functions to read the label. The products that have been added to the cart will be displayed on the application intended for customers and the web server for the cashier. Information on the website includes product name, price per product unit, product quantity, and total bill.
Smart Security System for Housing Using Website-Based MQTT Tobing, Nindi Karynnina Luban; Rakhmania, Amalia Eka; Rasyid, Abdul
Jurnal Jaringan Telekomunikasi Vol 14 No 1 (2024): Vol. 14 No. 01 (2024) : Maret 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v14i1.782

Abstract

The housing security system is one of the aspects of implementing a security system in several house buildings which have several functions that work to secure assets in the building. Then in residential areas it is difficult to carry out intense security. This study designed a "Smart Security System in Housing Using Website-Based MQTT". This system is equipped with PIR sensors, LDR, ACS 712, and limit switches that are placed in each house. PIR sensors are used to detect human movement, limit switches are used to detect open doors, and LDR sensors are used to automate outside lights when homeowners activate outdoor mode. The ACS 712 sensor functions to give a warning of an anomaly in current usage. Using ESP8266 as a controller that sends data to the online MQTT broker "broker.mqtt-dashboard.com" which is equipped with the cloud. Home owners website programming using Node-RED installed on Raspi. Likewise with the security guard website using Node-RED as a website design. In monitoring at the security guard, you can monitor the security of the doors in each house. The results of the accuracy of the PIR sensor are only able to detect movement at a distance of less than 400 cm. The LDR sensor used in outdoor lighting automation with a voltage limit value above 2.56 V detects no light intensity. The accuracy of the ACS 712 current sensor in house 1 is 95% and house 2 is 94%.
Implementation of Wireless Sensor Network on Smart Trash Bins Using LoRa With AES128 Algorithm (Case Study: Mentari Waste Bank Panceng Gresik) Hanafi, Nur; Yulianto , Ahmad Wilda; Rakhmania, Amalia Eka
Jurnal Jaringan Telekomunikasi Vol 14 No 1 (2024): Vol. 14 No. 01 (2024) : Maret 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v14i1.788

Abstract

Waste bank systems such as Bank Sampah Mentari (BSM), located in Prupuh, Panceng, Gresik Regency, were created as a method of reducing waste. In its operation, the BSM management still has several difficulties such as the need to check the resident’s shelters, to administrative problems that are still done manually. Based on these problems, the implementation of a wireless sensor network on a smart trash bin using LoRa with the AES128 algorithm was made. The way it works is that the node device sends sensor reading data to the gateway every hour. The gateway will describe the incoming data, then upload it to MySQL and firebase before being accessed in the application. The test shows that the system can run well according to the plan where the farthest distance of LoRa is 300 meters. The average RSSI generated by node 1 is -95.78 dBm, node 2 is -112.57 dBm, and node 3 is -117 dBm. HC-SR04 ultrasonic sensor testing has an error of 0.795% (accuracy of 99.205%), while the MAX17048 sensor has an error of 0.3% with accuracy of 99.7%.
Analisis Kinerja Sistem Modulasi Downlink LTE dan 5G pada Kanal AWGN Berbasis MATLAB Rakhmania, Amalia Eka; Harvinanda, Akhmad Mukhibuddin; Hudiono, Hudiono; Hariyadi, Aad; Hadiwiyatno; Taufik, Mochammad
Techné : Jurnal Ilmiah Elektroteknika Vol. 22 No. 2 (2023)
Publisher : Fakultas Teknik Elektronika dan Komputer Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31358/techne.v22i2.341

Abstract

Pada penelitian ini dilakukan analisis performansi downlink LTE dan 5G dengan menggunakan MATLAB. Penelitian ini bertujuan untuk menganalisis perbandingan kinerja teknik modulasi QPSK, 16-QAM, dan 64-QAM yang digunakan pada downlink LTE dan teknik modulasi QPSK, 16-QAM, 64-QAM, dan 256-QAM pada downlink 5G yang melalui kanal AWGN untuk mengetahui nilai BER pada teknik modulasi yang digunakan. Teknik multiplexing yang digunakan adalah OFDM dan CP-OFDM untuk downlink LTE dan CP-OFDM untuk downlink 5G dengan variasi cyclic prefix yang digunakan adalah kategori ”normal”. Pada downlink LTE, kinerja modulasi QPSK lebih baik dari 16-QAM dan 64-QAM. Pada OFDM, BER QPSK diperoleh 10-19 pada Eb/No 16 dB, BER 16-QAM diperoleh 10-19 pada Eb/No 20 dB dan BER 64-QAM diperoleh 10-8 pada Eb/No 20 dB. Pada CP-OFDM, BER QPSK diperoleh 10-20 pada Eb/No 16 dB, BER 16-QAM diperoleh 10-19 pada Eb/No 20 dB dan BER 64-QAM diperoleh 10-9 pada Eb/No 20 dB. Pada downlink 5G CP-OFDM, kinerja modulasi QPSK lebih baik dari 16-QAM, 64-QAM dan 256-QAM, BER QPSK diperoleh 10-24 pada Eb/No 16 dB, BER 16-QAM diperoleh 10-23 pada Eb/No 20 dB, BER 64-QAM diperoleh 10-14 pada Eb/No 20 dB, dan BER 256-QAM diperoleh 10-7 pada Eb/No 20 dB.
Implementation of Location Base Service Method Using WI-FI Network For Object Recognition at Museum Rakhmania, Amalia Eka; Prasetyo, Junaedi Adi; Refiza, Rizky
Journal of Applied Smart Electrical Network and Systems Vol 3 No 01 (2022): Vol 3 No 1 : June 2022
Publisher : Indonesian Society of Applied Science (ISAS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jasens.v3i01.419

Abstract

The museum that is currently being built is used as a place to manage existing historical objects, because real historical objects are easy to know when in the museum. The current management of the museum still uses a manual system, where visitors come to the museum and then see the historical objects in the museum. Nowadays, with the rapid development of the times, the use of advances in information can be used whenever and wherever the user is. Location-based services in museums can be used to develop object recognition systems implemented in museums. In this research, a Location Base Service (LBS) system will be created that uses an android application that is connected to a server to make it easier to study historical objects. The android device will transmit the current position signal received by the Access Point. The Android application functions as a viewer of nearby historical object description objects. When the user wants to observe a nearby historical object, the user will display a video about the object to introduce nearby objects. To support the Location Base Service (LBS) system, several Access Points to track users via wireless connected to Android devices.
Co-Authors Abdul Rasyid Aisah Amalia Amalia Ardiansyah, Rizky Aulia, Hillyatul Dwi Fadila Kurniawan Hadiwiyatno Hanafi, Nur Hariyadi, Aad Harvinanda, Akhmad Mukhibuddin Hudiono Hudiono Hudiono, Hudiono Kusumawardani, Mila Nirmala, Nabila Laila Nurul Hidayati P, Ridho Hendra Yoga Prasetyo, Junaedi Adi Rahmaniar, Wahyu Refiza, Rizky ridho hendra yoga perdana Soelistianto, Farida Arinie Taufik, Mochammad Tobing, Nindi Karynnina Luban Wijayanti, Rieke Adriati Yulianto , Ahmad Wilda