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Author: search.filters.author.Teawchim, Sanit

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    Development of Soccer Robot
    (2024-01-01)
    Kamon, Supaphon
    ;
    Boonraksa, Promphak
    ;
    Teawchim, Sanit
    This paper presents the development of soccer robots for the WRG (World Robot Game) competition. Two models of soccer robots are designed and developed following the rules of WRG competition. One model is designed for 4WD (wheel drive), and another one is designed for 2WD. The soccer robots are controlled using a Flysky FS-GT3B RC transmitter in wireless communication. System structure and software development for controlling movement of the soccer robot are presented in this paper.
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    HB-UWB transmission wavefrom model for wireless body area network
    (2017-02-21)
    Teawchim, Sanit
    ;
    Promwong, Sathaporn
    This paper are presents characteristics of human body-ultra wide band (HB-UWB) transmission model for WBAN. The human body channel is more complex and distinctive than other application. This complex and irregular shapes that cannot be analyzed as a regular Therefore, to understand human body channel is so important. The channels model is classified with body mass index (BMI). The root raise cosine passband waveform is used as UWB transmitted waveform. The body channel transfer functions on human body are measured follow IEEE802.15.6 by using vector network analyzer (VNA) at frequency 3 GHz to 5 GHz. Distortion is important parameter for UWB waveform transmission. It can be fine from path loss model, which show compared of average power loss and peak power loss. The results can be applied to use evaluation channel model on human body.
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    Experimental evaluation of UWB human body transmission model for WBAN
    (2016-09-06)
    Teawchim, Sanit
    ;
    Promwong, Sathaporn
    This paper presents experimental evaluation of UWB human body transmission model for WBAN. The human body is more complex and many side than other application. Therefore, to understand human body channel is so important. The root raise cosine passband waveform is used as UWB transmitted waveform. The channels model is classified with body mass index. The body channel transfer functions on human body are measured by using vector network analyzer (VNA) at frequency 3 GHz to 5 GHz. The path loss model is show compared of average power loss and peak power loss. The results are discussed in conclusion.
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    Experimental study of ultra wideband human body channel
    (2016-09-06)
    Teawchim, Sanit
    ;
    Southisombath, Phouthong
    ;
    Promwong, Sathaporn
    This paper a study of UWB human body channel. The human body is more complex than other application. Therefore, to understand human body channel is so important. The analysis is based on the extension Friis' transmission formula that uses to characterize the WBAN channel transfer function. The rectangular passband waveform is used as UWB transmitted waveform. The channels of 5 positions on human body are measured by using vector network analyzer (VNA). The frequency channel transfer functions, power delay profile (PDP) and path loss are shown. The results are discussed in conclusion.
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    Characteristic of ultra wideband body area network channel
    (2015-10-01)
    Teawchim, Sanit
    ;
    Promwong, Sathaporn
    This paper presents characteristic of ultra wideband body area network (UWB-BAN) channel. The passband rectangular waveform and passband root raised cosine (RRC) waveform are provided to transmit signal. In this paper, an investigation channel measured by using a network analyzer and performed a frequency ranged with 3 GHz–5 GHz. The meander line miniature antennas were taken to obtain as a transmitter and receiver antenna side, repectively. The 12 sample bodies with 10 positions of each body were considered. The linear regression model of large-scale path loss and cumulative distribution function (PDF) of multipath fading factor based on average and peak power loss are shown. Measurement data are useful to predict the performance of UWB-BAN system.