KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Supramongkonset, JatupornHas files: No

Search Results

Now showing 1 - 5 of 5
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Path Loss Analysis of RFID Channles Measurement in Library with Metal Bookshelves
    (2023-01-01)
    Supramongkonset, Jatuporn
    ;
    Promwong, Sathaporn
    The radio frequency identification (RFID) library management system has gained popularity in libraries due to its convenience and improved efficiency. Accurate channel modeling is crucial for predicting system performance and received power. This paper focuses on modeling the channel characteristics of metal bookshelves in RFID library management systems operating at a frequency of 2.45 GHz. We employ microstrip patch antennas as both transmitter (Tx) and receiver (Rx) antennas, considering both vertical-vertical (V-V) and horizontal-horizontal (H-H) polarizations. Linear regression analysis models the path loss characteristic, allowing us to establish a mathematical relationship that accurately represents the path loss between the antennas. Furthermore, statistical models based on cumulative distribution function (CDF) are employed to characterize multipath fading, providing insights into the distribution of signal variations caused by multipath propagation. The experimental results indicate that metal bookshelves with V-V and H-H polarizations are suitable for the performance of RFID library management systems. The path loss models generated through linear regression analysis enable accurate prediction of received power, while the statistical models based on CDF contribute to a comprehensive understanding of multipath fading and its impact on system performance. This study provides valuable insights for librarians and system designers seeking to implement efficient and reliable RFID technology in library management systems. By examining and modeling the channel characteristics of metal bookshelves, our findings support the optimal use of V-V and H-H polarizations, ensuring the effective operation of RFID systems in library environments.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Evaluation of RFID Propagation Channels with Wooden and Metal Bookshelves Based on Measurement Data
    (2023-01-01)
    Supramongkonset, Jatuporn
    ;
    Rattasuwan, Kotchakorn
    ;
    Promwong, Sathaporn
    This paper studies the propagation that occurs in Radio Frequency Identification (RFID). The purpose of this study is to establish a model to study the energy and efficiency of the system. Experimenting with two model of bookshelf models. Wood and metal bookshelves are used as models to measure data. Microstrip antenna are used as a transmitter (Tx antenna) and a receiver (Rx antenna) at frequency of 2.45 GHz channels in co-polarization. From the data of this measurement result, we can observe the tendency of path loss arising from the change in distance and the effect of the signal in both wood and metal bookshelf by the contouring of the path loss signal. The results showed that the co-polarization had higher path loss at increased distances. By path loss modeling using contour method it was found that at measuring point near the edge of the bookshelf There is path loss in the edge of metal bookshelf higher than the edges of wooden bookshelf.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Quantitative Experimental Evaluation of RFID Propagation Loss with Wooden and Metal Bookshelves
    (2023-01-01)
    Supramongkonset, Jatuporn
    ;
    Promwong, Sathaporn
    Radio frequency identification (RFID) is wireless multimedia applications for bookshelves experimental system to replace the barcodes media technology. The RFID propagation channel characteristics and environment effect should be known. In this study to evaluate the RFID propagation loss with wooden and metal bookshelves based on data of measurement. Experimental study evaluation of RFID multimedia system with bookshelves is using vector network analyzer (VNA) and the microstrip patch antennas of transmitter (Tx) and receiver (Rx) antennas at a frequency range from 2.4 GHz to 2.5 GHz. The results of experiment are considering the path loss, received signal strength (RSS), and comparison the path loss differences with cumulative distribution function (CDF) to evaluated, respectively. In this research work are necessary for RFID antenna design and evaluate the RFID multimedia systems.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    A Study of A2A Channel Modeling for Small UAV-Enabled Wireless Communication
    (2022-01-01)
    Supramongkonset, Jatuporn
    ;
    Duangsuwan, Sarun
    ;
    Promwong, Sathaporn
    The objective of this work is to study the ground reflection modeling case study of air-to-air (A2A) channel modeling for an unmanned aerial vehicle (UAV)-enabled wireless communications. We consider the Internet of Things (IoT) WiFi modules at 2.4 GHz standard enabled with the transmitter Tx- UAV and the receiver Rx-UAV. The received signal strength indicator (RSSI) and path loss characteristics are addressed by using the free space path loss (FSPL) model, air-to-air two- ray (A2AT-R) model, and the modified Log-distance path loss model. The measurement results indicated that the limit of power constraint of WiFi modules was a level at 10 m Rx-UAV altitude, and the received sensitivity was limited at -95 dBm. It is shown that the impact of ground reflection path loss was characterized at 1-3 m Rx-Uavaltitudes which are accordingly related to the A2AT-R model and the relative resulting with the modified Log- distance model above 4 m Rx-UAV altitudes.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Empirical Path Loss Channel Characterization Based on Air-to-Air Ground Reflection Channel Modeling for UAV-Enabled Wireless Communications
    (2021-01-01)
    Supramongkonset, Jatuporn
    ;
    Duangsuwan, Sarun
    ;
    Maw, Myo Myint
    ;
    Promwong, Sathaporn
    The purpose of this work was to investigate the air-to-air channel model (A2A-CM) for unmanned aerial vehicle- (UAV-) enabled wireless communications. Specifically, a low-altitude small UAV needs to characterize the propagation mechanisms from ground reflection. In this paper, the empirical path loss channel characterizations of A2A ground reflection CM based on different scenarios were presented by comparing the wireless communication modules for UAVs. Two types of wireless communication modules both WiFi 2.4 GHz and LoRa 868 MHz frequency were deployed to study the path loss channel characterization between Tx-UAV and Rx-UAV. To investigate the path loss, three types of experimental channel models, such as CM1 grass floor, CM2 soil floor, and CM3 rubber floor, were considered under the ground reflection condition. The analytical A2A Two-Ray (A2AT-R) model and the modified Log-Distance model were simulated to compare the correlation with the measurement data. The measurement results in the CM3 rubber floor scenario showed the impact from the ground reflection at 1 m to 3 m Rx-UAV altitudes both 2.4 GHz and 868 MHz which was converged to the A2AT-R model and related to the modified Log-Distance model above 3 m. It clear that there is no ground reflection effect from the CM1 grass floor and CM2 soil floor. This work showed that the analytical A2AT-R model and the modified Log-Distance model can deploy to model the path loss of A2A-CM by using WiFi and LoRa wireless modules.