Promwong, Sathaporn

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Promwong, Sathaporn
Alternative Name
Promwong, S.
Promwong, Sathapom
Promwong, Sathapotn
Promwong, Sathapron
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sathaporn.pr@kmitl.ac.th

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    Experimental evaluation scheme of ultra-wideband human body transmission model for wireless body area network
    (2018-01-01)
    Chaisang, Aditep
    ;
    Promwong, Sathaporn
    The body area network (BAN) working on IEEE 802.15.6 is a wireless short-range communication system that is smaller in coverage than the personal area network (PAN) IEEE802.15.3a. A wireless body area network (WBAN) is a wireless technology with a human body that is becoming a key part of short-range radio wave systems and wireless medical technology. The transfer function characteristics of the human body and the transmission loss due to the human body should be studied. Short-range radio wave applications with a human body are more complicated than additional uses. Therefore, realizing the distribution channel characteristics of the human body with ultra-wideband (UWB) technology is important. UWB technology has a very large bandwidth, low power, and low cost, which can be used in shortrange systems. In this paper, we present the characterization measurement data of the UWBHB channel transfer function based on the human body effect with and without human body in WBAN system. In this study, we maximize the signal-to-noise ratio (SNR) and contemplate the matched filter at the receiver. The outcomes are analyzed and evaluated on the basis of Friis' formula. The proposed method achieves very precise results and is convenient for the evaluation and design of the waveform of WBAN transmission in wireless medical applications and BAN systems, mainly focusing on the input waveform effect.
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    Investigation of Wireless Body Area Network Localization Based on Measurement Data
    (2022-01-01)
    Promwong, Sathaporn
    ;
    Khongsomboon, Khamphong
    ;
    Chaisang, Aditep
    Short-range wireless communication is important for application use in wireless medical monitoring systems and wireless body area network localizations. Therefore, the channel's characteristics and the human body effect must be studied. This paper will investigate the wireless body area network localization and ZigBee technology based on the IEEE 802.15.4. Moreover, model wireless body area network measurement using a vector network analyzer at the frequency range of 2.2 GHz to 2.6 GHz for measurement and recording. In the experiment result, the wireless body area network localization is analyzed and evaluated by considering the received signal strength and distance error shown in the cumulative distribution function based on the CLEAN algorithm. From experimental studies, this project is beneficial for development studies and essential information for future research studies of wireless body area network localization applications.
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    Optimization of HB-UWB Transmission Waveform for BAN Applications
    (2018-07-02)
    Chaisang, Aditep
    ;
    Promwong, Sathaporn
    The modern technology of wireless communications is rapidly developed and apply with short range communication networks around human body. The related research in these application has been investigating. In order to study the effect of human body in the high speed data rate technology, the patterns of ultra wideband for body area network has been studied. The measurement results have been measure and collected by vector network analyzer and analyze by using the equation of Friis. The proposed model is design for test and measure with human body in an indoor environment. The results show the usefulness information for a wireless communication for human body area network with ultra wideband.
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    A Study of Improved Indoor Localization Accuracy using Looping Min-Max Technique
    (2024-01-01)
    Tiengthong, Thanadol
    ;
    Mankong, Thanadon
    ;
    Suwansukho, Nattapan
    ;
    Southisombath, Phouthong
    ;
    Chaisang, Aditep
    This paper investigates the efficacy of WLAN technology at 5.8 GHz for indoor localization, a widely adopted and versatile approach due to its adaptability and ease of implementation. The choice of 5.8 GHz frequency offers several advantages, including reduced interference and higher data transmission rates, enhancing the precision and reliability of localization systems. Utilizing Received Signal Strength (RSS) for distance calculation is employed due to its computational simplicity and efficiency. The proposed methodology employs a modified Min-Max technique for estimating positions, iterating the Min-Max process until the distance error aligns with a predefined threshold. Comparative evaluation using Cumulative Distribution Function (CDF) demonstrates improved accuracy compared to conventional Min-Max methods. The research findings indicate promising enhancements in accuracy and efficacy for indoor localization using WLAN technology at 5.8 GHz. These advancements hold significant potential for real-time indoor localization applications, paving the way for improved indoor navigation and tracking systems in the future.
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    DVB-T2 Transmission Model in Bangkok Thailand with 626 MHz for DTT
    (2018-08-21)
    Chaisang, Aditep
    ;
    Promwong, Sathaporn
    Digital television terrestrial (DTT) of Thailand used digital video broadcasting terrestrial 2nd generation (DVB-T2). The DVB-T2 transmission loss should be knowing and study. However the DVB-T2 propagation channels performance is very importance for Thailand. This paper evaluation of DVB-T2 propagation channel base on measurement data. In the experimental study of DVB-T2 propagation channel in Bangkok environment for DTT network for portable in urban areas in Bangkok Thailand at MCOT channel 40 at the frequency 626MHz. In these results to evaluate the power loss, probability density function (pdf), commutative distribution function (cdf).
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    Experimental Study of TETRA Radio for Railway Communication with Leaky Feeder Configuration
    (2023-01-01)
    Suwansukho, Nattapan
    ;
    Chaisang, Aditep
    ;
    Tiengthong, Thanadol
    ;
    Promwong, Sathaporn
    In railway voice communication, the digital radio communication, that are widely used whether along the trackside and in the tunnels especially in urban area. The TETRA standard was selected to be used for fulfill the railway operations requirement. Almost TETRA radio system, the configuration almost carried out with the leaky cable configuration This paper presents the experimental study of TETRA radio system with leaky cable configuration, that being used in the railway communication. The frequency being used are between 385-400 MHz. The result shows the calculated received power compared to the actual received signal with the position of train antenna that closed to the leaky cable, the distance is approx. 3 meters.
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    Location Context Awareness System for Specific Positioning Based on Received Signal Strength for Android Platform System
    (2023-01-01)
    Nonalinsavath, Khamla
    ;
    Khieovongphachanh, Vimontha
    ;
    Southisombath, Phouthong
    ;
    Chaisang, Aditep
    ;
    Phomkeona, Sanouphab
    In the current era of seamless integration across various contexts, the ability to track mobility both indoors and outdoors has become crucial for many individuals. Tracking the path of mobility from the initial point to the final destination is essential in numerous aspects of human life. This study presents a location-Aware computing application that facilitates the smooth integration of indoor and outdoor environments by combining both requirements within a smart device-based system, without any barriers. The proposed work utilizes the Global Positioning System (GPS) and the Global System for Mobile Communications (GSM) to measure external conditions, while Wi-Fi Fingerprinting (Wi-Fi) is employed to accurately determine the user's indoor locations using received signal strength indicator. The integration of indoor and outdoor technologies ensures seamless user mobility. As users transition between different conditions, the system effectively addresses the complexities that arise between indoor and outdoor locations. The transition time between indoor and outdoor is less than 5 seconds, with seamless switching occurring in the overlapped areas. In our experiments conducted within a campus building, the system achieved a remarkable accuracy of 98.4% for outdoor-To-indoor movement and 97.7% for the reverse movement. Furthermore, the seamless location system offers significant benefits to users, including the discovery of new system features, access to directional maps, and guidance along pathways from their current locations.
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    Wireless Body Area Network Transmission Model Based on Measurement Data
    (2018-08-21)
    Chaisang, Aditep
    ;
    Promwong, Sathaporn
    Wireless body area network (BAN) technology is becoming an increasingly important part of the human body communication system and short range applications. Characteristic of ultra wideband impulse radio (UWB-IR) channel propagation is very important. The human body is more complex than other applications. Therefore, to understand the characteristics of the channel distribution on the human body is so important. This paper presents characteristic of channel propagation due to effect within human body and without human body for wireless applications based on measurement data. The template waveform is considered at the receiver side to maximize the SNR for evaluation. In this paper, the results are evaluated based on the extended Friis' transmission formula. This technique gives very accurate results and is very useful for the design and evaluation of UWB transmission for wireless medical applications, especially focusing on the effect of template waveform.
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    Indoor localization distance error analysis with UWB wireless propagation model using positioning method
    (2018-06-08)
    Chaisang, Aditep
    ;
    Promwong, Sathaporn
    The positioning system model in an indoor environment has been very importance in applications technology. The recent localization applications technology place important on the positioning system model for an indoor environment. The study shall be focus on the error due to the distance. However, to evaluate the distance error we consider used the UWBW propagation channel for indoor position because its different wireless technologies. In an indoor environment, this system requires the accuracy as high as possible. In this research study, the comparing of the positioning with received signal strength indication and time of arrival (TOA) positioning methods are presented. This study based on the purposed propagation model for ultra-wideband wireless (UWBW) is used to investigate the localization for indoor environment. To measure at the operate frequency from 3 GHz to 11 GHz, the vector network analyzer was used. The broadband antennas were used as both transmitter antenna (Tx) and receiver antenna (Rx). The distance error in this study is represent the precision and accuracy. The distance error with cumulative distribution function (CDF) of each are shown. From the result the positioning method for the indoor environment, the TOA method has more accuracy than the RSSI method.
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    The occurrence of passive intermodulation and troubleshooting in Thailand mobile industry
    (2020-07-01)
    Chaisang, Aditep
    ;
    Anantapreecha, Sinchai
    ;
    Promwong, Sathaporn
    This topic report about Passive Intermodulation(PIM) that can occurred in mobile indoor networks. We findout and troubleshoot this phenomenon by PIm tester. We reduced or adjusted PIM to acceptable level of IEC 62037 standard. This paper first describe the basic principle that PIM can generated and the mathematics backgrounds. PIM is occurred from nonlinear characteristics of all junctions in the networks. When we send two or more modulated signals in the same nonlinear network, PIM occurred and reduced signal quality.