Promwong, Sathaporn
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Preferred name
Promwong, Sathaporn
Alternative Name
Promwong, S.
Promwong, Sathapom
Promwong, Sathapotn
Promwong, Sathapron
Main Affiliation
Email
sathaporn.pr@kmitl.ac.th
100 results
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Item type:Publication, Indoor positioning based on IEEE 802.15.4a standard using trilateration technique and UWB signal(2012-11-12) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Performance evaluation of UWB communications with optimum receivers(2015-01-26); Southisombath, PhouthongThe performance of ultra wideband (UWB) communications are very important for short range wireless communication to consider with matched filter and correlation receivers are evaluated. The rectangular passband, modulated rectangular and modulated Gaussian waveforms, which is satisfied the UWB signal definition and Federal Communications Commission (FCC) indoor and outdoor limit spectral masks, are used as the transmitted UWB signal. The complex form of Friis' transmission formula is considered as the UWB free space channel. Therefore, the distortion effects caused from the channel are included. The BER performance of each waveform is shown and compared. The results are discussed in the conclusion. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Characterization of Wireless Power Transfer Measurement at 2.45 GHz(2018-07-02); Wireless sensor network has been developing rapidly. Internet of Things (IoT) is a major role for the next generation of wireless communication system. However, the power consumption and lifetime of the battery are a limitation for the IoT device. Wireless Power Transfer (WPT) is a promising technology to solve the problem due to it can be the ubiquitous power source for the IoT devices by provide the energy via the propagation of radiowaves. The 2.45 GHz ISM is a popular frequency bandwidth which widely used in WiFi application which make it easy to use. The performance of the propagation can evaluate by various parameter. Receive power is use to analyze the efficiency of the radio frequency transmission. Therefore, this paper has been evaluated the WPT measurement data with difference separate distance between antennas at 2.45 GHz. By using the meander line antenna as the transmit antenna and receive antenna. Vector network analyzer (VNA) is used to measure and record the transfer function. The receive power which analyze the measurement data by using link budget equation. The results have shown good agreement between the simulation and measurement result which have the average of measurement result less than the simulation result around 2 dB. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Comparison of UWB fingerprinting with vertical and horizontal polarizations for indoor localization(2010-07-30); The indoor localization system has been extensively researched because of its various applications. This system requires high accuracy in indoor environments which absence line of sight and dense multipath. Ultra wideband (UWB) fingerprinting is developed for this purpose. This paper discuss about indoor localization using a fingerprinting concept based on UWB signal and compares between vertical and horizontal polarization cases. All of the measurements used biconical antennas as both transmitter (Tx) and receiver (Rx) antennas. The channel frequency transfer functions of corridor environment were measured at frequencies ranging from 3 GHz to 11 GHz. The path loss and delay time of first three-path is investigated to perform the fingerprints and signatures. The accuracy of estimated distances is shown in terms of cumulative distribution function (CDF). From the results, horizontal polarization provides greater accuracy than vertical polarization. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Wideband antenna performance evaluation for ultra wideband communication system(2018-07-02) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Zigbee wireless sensor network localization evaluation schemewith weighted centroid method(2018-08-14); Using wireless communication system, appropriate and correct indoor localization with Zigbee sensor network and could provide interesting services and applications. In this study the Zigbee transmission model with positioning method by using the relative-span exponentially weighted centroid method for the indoor localization. The experimental results and analyze results are evaluated a distance error. The ZigBee transmission model in measurement consists of 121 positions with distance between positions to positions is 0.3 meter. The experimental setup at every position operated at frequency band from 2.3 GHz to 2.5 GHz. The accuracy of estimated position is considered in the term of distance error with the cumulative distribution function (CDF) of distance error is shown. The result presents optimal value for REWL is 0.2 and mean of distance error is 0.65 m. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Experimental characterization of a UWB channel model for body area networks(2011-12-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Distortion Analysis of the HB-UWB Transmission Waveform for WBAN Applications(2018-07-02); The body area network (BAN) is a wireless technology, which play an important role in very short range wireless communications and find a wide variety of applications such as WiMedia for relaying information gathered by biological sensors on body. The ultra wideband (UWB) technology is suitable for BAN system because of transmission by impulse radio and low power. However, signal distortion due to human body effect in human body-ultrawide band (HB-UWB) channel must be study. In this study, we evaluate HB-UWB channel which serious disturbed by the distortion. The distortion can cause extremely poor signal quality to wireless transmission channel even in free space because of the antenna characteristics and waveform distortion. Thus, the understanding of the effect from characterization of antenna and waveform effect is important. The measurement data of distortion analysis due the antenna and human body of HB-UWB for WBAN were presented in this research report. The receiver waveform template was present to maximize system signal to noise ration. The equation of Friis had been used to evaluate the results. The proposed method is practical for the HB-UWB evaluation, UWB antenna design, and provide more precision to identify the waveform distortion. The results can apply for the design of wireless medical devices which focus on the effect of human body. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Evaluation of WUWB Transmission with LOS and NLOS for Smart Home(2018-07-02); ;