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Herry Setiawan
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Politeknik Negeri Padang St. Kampus, Limau Manis, District Pauh, Padang City, Province West Sumatera, Zip code 25164. Indonesia
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International Journal of Wireless And Multimedia Communications
Published by Politeknik Negeri Padang
ISSN : -     EISSN : 20472172     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
Focus and Scope Jurnal Focus jowim journal focuses on wireless communication technology and its development The journal scopes include (but not limited to) the followings: Telecommunication Theory Internet Of Things Wireless Sensor Network Signal And Image Processing Wireless Communication Optical Fiber Communication Telecommunication And Computer Networks Antennas And Transmission Systems Artificial Intelligence Machine Learning
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 34 Documents
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Water Quality Monitoring System and Automatic Filter System Based on the Internet of Things Nelvidawati; Firdaus
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.13

Abstract

PDAM's peak usage of clean water means that water supply to customers often stops due to insufficient distribution of discharge and pressure. To overcome the problem of insufficient water flow, the community provides a water storage tank consisting of a ground water tank and an over head water tank. PDAM water received by the public through distribution pipes has the potential to be contaminated due to the entry of pollutants from repair activities and pipe leaks. These pollutants will accumulate in the tank, causing the water quality to decline and no longer comply with the established quality standards. To prevent accumulation of pollutants in the tank, before using it, the water should be filtered first. An automatic filtration system with monitoring of turbidity and water levels is a technology that can make people's work easier and the quality of the water used is in accordance with drinking water quality standards. Data obtained from turbidity and water level sensors can also be monitored via the IoT platform. The test results of the turbidity and water level sensors have a low error so that the designed tool can be used to monitor turbidity, water level and automatic filter systems. Sending data so that it can be displayed on IoT platforms such as Blynk has also been successfully created. From 10 attempts, the Water Level Sensor gave an average error of 0.78%.
Analysis of Signal Quality Performance on Telkomsel Providers in Simpang Alahan Mati District, Pasaman Regency Syaza Ibra Harlin; Dikky Chandra; Firdaus Nursal
International Journal of Wireless And Multimedia Communications Vol. 1 No. 2 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i2.19

Abstract

The emergence of complaints about the quality of the Telkomsel operator signal such as the received signal is not stable, data access is difficult to connect, and connection failures, so in this study to determine the cause of poor signal quality. Analysis of signal quality was carried out in Simpang Alahan Mati, Pasaman. Analysis was carried out by means of a drive test at the LSK120, LSK174, and LSK030 sites using TEMS Pocket on 3G and 4G networks, by analyzing parameter RSRP, SINR for 4G networks as well as the parameters RSCP and Ec/No to the 3G network. Then the propagation calculation is carried out to compare the value of the received power level measured with the coverage site obtained from the propagation calculation. The signal quality of Telkomsel operators in Simpang Alahan Mati From the measurement results for the 4G network with the average parameter value of RSRP - 102 dBm, and SINR 8 dB. The measurement results on the 3G network with an average value of RSCP parameters -98 dBm and Ec/No -11 dB. From the measurement results based on KPI, it can be seen that the signal quality on the 3G and 4G networks is included in the bad category caused by obstacles in the form of hills and trees from the comparison results of the RSRP and RSCP values measured by the range. site with propagation calculations.  
Link Budget Site Planning in Kuranji Region Andalas University - Mount Sarik Cania, Marisa; Chandra, Dikky; Yustini, Yustini
International Journal of Wireless And Multimedia Communications Vol. 1 No. 2 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i2.21

Abstract

Link budget is a way to calculate all parameters in signal transmission, ranging from gain and loss from the transmitter to the receiver via transmission media. This design is motivated by planning at PT. Alita Praya Mitra for site development in Kuranji region – University Andalas (UNAND) – Gunung Sarik with the reason to provide improved operator services, especially XL operator. In this final project to design using Pathloss 4.0 software as a tool that can facilitate a planner in calculating link budget. In this design the parameters used are propagation distance between sites, Effective Isotropic Received Power (EIRP), Free Space Loss (FSL), Isotropic Received Level (IRL), Received Signal Level (RSL) and Fade Margin (FM). On the calculation of the microwave transmission line of the kuranji area - University Andalas  with a propagation distance of 1.17 km, University Andalas - Gunung Sarik with a propagation distance of 1.01 km, Gunung Sarik – Kuranji with a propagation distance of 1.19 km.
Quality Of Service (QOS) Analysis on LTE Networks Time Division Duplex and Frequency Division Duplex Technology Aulia, Rizki; Chandra, Dikky; Mirza, Yulian; Nasrul; Dhino, Miro
International Journal of Wireless And Multimedia Communications Vol. 1 No. 2 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i2.22

Abstract

Quality of service is a method of measuring a network and attempts to define a characteristic used to provide good service. The increasing use of mobile technology has a rapid impact on the development of technology and information. These developments relate to the use of customized information and communication services in a direct, practical and effective manner. In response to these issues, researchers are interested in conducting research by looking at the parameters of Time Division Duplex (TDD) technology at a frequency of 2300 MHz and Frequency Division Duplex (FDD) at a frequency of 900 MHz on the download service. The results of quality of service measurements on LTE networks are carried out in real time in the field by comparing each QoS parameter against a predetermined path from the eNodeB point based on RSRP and SINR with different conditions. In both TDD and FDD technology. The effect of RSRP on Quality of Service parameters in each cell measured. One of them is PCI 328, when the RSRP condition is measured - 80 dBm, the throughput value is 9466.29 Kbps, latency 0.84 ms, jitter 0.028 ms and packet loss 0%. Conversely, when the RSRP condition is measured - 100 dBm, the throughput is 4084.16 Kbps, latency 1.68 ms, jitter 0.059 ms and packet loss 0.50%. Then the effect of SINR on Quality of Service parameters in 2 different modulations is seen in each cell measured. One of them is PCI 328, when the SINR condition is measured at 20 dBm, the throughput value is 9074.99 Kbps, latency 0.86 ms, jitter 0.034 ms and packet loss 0%. Conversely, when the SINR condition measured 12 dB then the throughput is 4239.58 Kbps, latency 0.88 ms, jitter 0.027 ms and packet loss 0.03%. Based on the results obtained the throughput value of LTE TDD has a better value on the download service and has a better throughput value.
Design and Construction of A Grid Antenna to Enhance Global System for Mobile Communications 900 Mhz Signal Reception Widiyastuti, Ayu; Ramiati, Ramiati; Purwadi, Agus; Rini Febriani, Rini Febriani
International Journal of Wireless And Multimedia Communications Vol. 1 No. 2 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i2.24

Abstract

Human life is inseparable from the interaction between humans as social beings and technology as the medium used by humans. The capabilities of technology have addressed various human challenges for interacting with each other, where limitations of distance, time, and space are no longer barriers to human desire for communication. The Global System for Mobile communication (GSM) is a cellular communication technology applied to mobile communication, especially mobile phones, thus providing conveniences as a medium for information delivery. However, in remote or rural areas far from the Base Transceiver Station (BTS), the signal coverage is poor. This will disrupt communication such as short message service (SMS), telephone calls, internet access, and other forms of communication. An antenna is a device used to transmit or receive electromagnetic waves. Reception using an antenna will amplify the signal acquisition according to the antenna's capabilities. GSM (Global System for Mobile Communications) service providers, with their limited network coverage, create a significant need for signal acquisition enhancement. The Grid antenna is one of the options for signal acquisition enhancement. The Grid antenna has two main components: the driven element, which is a dipole, and a reflector that serves to reflect the signal transmission. This Final Project is designed, realized, and measured on a grid antenna at GSM 900 MHz. This antenna is intended to serve as a supporting medium to enhance GSM signal reception in order to maximize signal acquisition and connection.
Simple Regression Model Analysis of the Effect of Temperature on Rainfall in Padang City Using Scikit-Learn Nelvidawati, Nelvidawati
International Journal of Wireless And Multimedia Communications Vol. 1 No. 2 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i2.41

Abstract

Temperature is one of the factors that influences the intensity of rainfall in an area. The higher the temperature in an area, the higher the evaporation so the greater the chance of rain, especially if this occurs at sea. The location of Padang City close to the sea  influences the intensity of rainfall that occurs. Research was conducted to model the effect of temperature on rainfall that occurs in Padang City using simple linear regression using the Python programming language. The methodology used to model the relationship between these two variables is the Cross-Industry Standard Process for Data Mining. The simple regression model equation obtained is y = -26.73 x + 1119.98. The evaluation carried out on the model resulted in a relationship that was not close and had a negative correlation. The error rate of the simple linear regression model used in this study is quite large with a mean model error value of 40%, an MAE value of 124.2311, MSE 23489.97 and RMSE 153.2644. A good model has MAE, MSE and RMSE close to zero. Further research is needed to find out a suitable model to describe the relationship between temperature and rainfall that occurs in Padang City.
Analysis of Long-Term Evolution (LTE) Propagation Pathloss Calculation and Pathloss Simulation in Lubuk Minturun Urban Village, Koto Tangah Sub-District, Padang Syaza Ibra Harlin; Nadita Wijayani Putri; Nasrul; Aulia, Siska; Azhar
International Journal of Wireless And Multimedia Communications Vol. 1 No. 2 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i2.42

Abstract

Good signal quality is characterized by the small amount of propagation path loss or path loss that occurs. These propagation path losses can be caused by the distance between the site and the receiver (mobile station), transmitter frequency, natural conditions, and weather conditions. The farther between the site and the receiver (mobile station), the greater the propagation path loss. The use of propagation models in planning a site development in an area can predict or consider the value of propagation path losses, such as the Okumura-Hatta and COST-231 propagation models. Measurement of signal quality received by the receiver (mobile station) in the making of this final project using the drive test method. Determination of site coordinates in the measurement makes it easier to calculate the distance between the site and the mobile station. The calculation of the Okumura-Hatta propagation model and the COST-231 propagation model will produce a better-received power level value compared to the received power level value in the measurement. This is because the calculation only considers the distance between the site and the receiver (mobile station) without any obstacles or barriers, while the value generated during measurement will be influenced by distance, obstacles or barriers, earth contours, and weather conditions. One of them is Lubuk Minturun Village where the measurement of propagation path loss (Pathloss) is carried out due to the poor quality of the 4G Long Term Evolution (LTE) network.
Multiple Input Multiple Output Slot Antenna Design  With -22 Db Isolation Without Decoupling Structure For Application On Ultra Wide Band Marselina, Nadilla; Septima, Uzma; Yolanda, Amelia; Yustini, Yustini
International Journal of Wireless And Multimedia Communications Vol. 1 No. 2 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i2.53

Abstract

Technology that is always evolving requires us to always make the latest innovations, one of which is in the field of telecommunications. Currently, multiple input multiple output (MIMO) technology is widely used in ultra wideband (UWB) systems to overcome the effects of multipath fading. Multiple antennas are used to increase channel capacity. Two-element MIMO UWB systems have several techniques for obtaining good isolation between antenna elements. In this final project, the design and analysis of the change of a single UWB slot antenna into a 2-element MIMO UWB antenna is carried out by placing the antenna elements asymmetrically to get high antenna isolation. The proposed UWB MIMO antenna has a very compact size of 42×25 mm2. The fed slot microstrip antenna acts as a single UWB antenna element. Antenna design using CST Study Suite software. In the simulation results, a single UWB slot antenna that is modified into a UWB MIMO antenna has a return loss of -28 dB, a bandwidth of 7.2514 GHz, isolation below -20 dB, a VSWR of VSWR 2 in the frequency range of 3.7002 GHz to 9.6546 GHz, the gain reaches 3.2 dBi, and radiation pattern which is quasi omnidirectional.
IoT-based Fishpond Monitoring to Improve Water Quality Putri, Yuliana; Agnesia, Meidina
International Journal of Wireless And Multimedia Communications Vol. 2 No. 1 (2025): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v2i1.57

Abstract

To address the issues of suboptimal water levels and the risk of pond water overflowing due to rainfall, a fish pond control and monitoring system utilizing Internet of Things (IoT) technology has been developed. The system monitors three primary parameters—water level, temperature, and rainfall—which are all controlled and observed through an internet-connected platform. This real-time monitoring, facilitated via a website, enables fish farmers to accurately and efficiently monitor the condition of their ponds. The system is built using a NodeMCU ESP8266 microcontroller, which is equipped with sensors to automatically collect data on the water level, temperature, and rainfall. This data is continuously updated and can be accessed online anytime, anywhere. As a result, fish farmers can quickly react to changes in pond conditions, such as adjusting water levels to prevent overflow, or maintaining optimal water temperature for fish health. The real-time feedback provided by the system also allows users to take timely actions to prevent issues that could negatively impact the fish’s health or overall pond productivity. This IoT-based fish pond monitoring and control system makes pond management more efficient and minimizes the risks posed by environmental factors such as sudden weather changes. Additionally, it helps optimize the overall productivity of fish farms by offering a reliable, automated solution that reduces the need for constant manual supervision. This leads to better management of fish ponds and enhances productivity
Design of Monitoring and Control System For Air Temperature And Humidity In Oyster Mushroom Cultivation Room Based on IOT Aulia Mutaqi, Raffa; Yuliza, Milda; Antonisfia, Yul; Nisa, Nisa Rahima Sakinah
International Journal of Wireless And Multimedia Communications Vol. 2 No. 1 (2025): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v2i1.59

Abstract

Oyster mushroom cultivation is very popular among rural and urban communities, both on a small, medium and industrial scale. Oyster mushroom cultivation requires controlling the temperature and humidity in the mushroom barn to get optimal mushroom body growth. In general, the optimal temperature for oyster mushroom growth in the fruiting phase is 26-30°C with a humidity of 70-95%RH. This system describes the workings of the device used to monitor temperature and humidity using a DHT22 sensor through a microcontroller, which is displayed on the Blynk application and a 20x4 LCD. Measurements in lowland areas show a temperature of 29°C and humidity of 95%. The percentage error of the temperature measurement with the DHT22 sensor is 6.37%, with an average error of 1.60%. As for humidity, the measurement error is 0.71% with an average error of 0.82%. With this system, mushroom farmers can monitor the environmental conditions of the cultivation room in real-time through an IoT platform connected to the sensor.

Page 2 of 4 | Total Record : 34

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