Supanakoon, Pichaya
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Preferred name
Supanakoon, Pichaya
Alternative Name
Supanakoon, P.
Main Affiliation
Email
pichaya.su@kmitl.ac.th
7 results
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Item type:Publication, Accuracy Analysis of Indoor Positioning Using Min-Max Method(2025-01-01); ; In this paper, the accuracy analysis of indoor positioning using min-max method is proposed. The distance error model is applied to estimate the distance between the transmitter and user's position with different path loss exponent and fading amount of indoor channel. The total $\mathbf{1 0 0}$ coordinates of user's positions are estimated using min-max method. The distance error at each position, probability density function (PDF) and cumulative distribution function (CDF) of distance errors are illustrated. The mean of analysis distance error corresponds with the mean of measurement distance error with same path loss exponent and fading amount of indoor channel. The results show that it is possible to use this accuracy analysis to estimate the distance error in an indoor environment. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study on performance of ultra wideband and narrow band propagation for an indoor positioning(2016-07-18); This paper studies ultra wideband (UWB) and narrow band (NB) propagation in the frequency range of 3 GHz to 11 GHz. The UWB signal was used to follow the standard of IEEE802.15.4a in order to find the position in line of sight (LOS) and non-line of sight (NLOS) environment. Then, the sinusoidal frequency was tested in the frequency range of 3 GHz to 11 GHz, changing 1 GHz per step in order to analyze and compare with the UWB standard. The experiments were done by using vector network analyzer (VNA). Four conditions were studied in LOS and NLOS environment for indoor positioning. The four condition are the parameters; UWB standard; polarizations; and the frequencies. For the positioning determination, a location pattern technique was used with a minimum root mean square (RMS) error matching algorithm to find the position. Finally, a suitable condition is shown, and it has an accuracy of 91.11% at 1 meter. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study on Accuracy of Min-Max Method Using Distance Error Model for Indoor Positioning(2022-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Localization of index finger using radar cross section measurements for touchless keypad model(2015-10-01); This research paper has proposed the use of radar cross section (RCS) measurements as input parameters with a minimum root mean square (RMS) error matching algorithm on a touchless keypad model for localization of human’s index finger. To compare the localization performances, path loss input parameters are also used in the experiments. The touchless keypad model is tested in two different distances between the finger and the keypad under varying conditions. The experiments on the touchless keypad model are carried out in accordance with the IEEE802.15.3a (full band) and IEEE802.15.4a (high and low bands) ultra wideband (UWB) standards and in the horizontal polarizations. This research also examines the effects of Rx angles relative to the finger and of human factor on the RCS parameters by experimenting with seven volunteers. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study of RC Quadcopter and RC Fixed-Wing RCS Estimation in an Outdoor Environment with L-Band Primary Surveillance Radar(2022-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study of UWB indoor localization using fingerprinting technique with different number of antennas(2017-02-21); Wireless sensor networks (WSNs) have been applied in various applications. Each application is developed in order to increase security, increase convenience to life and property. In this work, we have analyzed the application of WSNs to locate with fingerprinting technique on the standard of IEEE802.15.4a (Ultra wideband (UWB)) in terms of the number of antennas required when using line of sight (LOS) environment. The experiment was done by using a vector network analyzer (VNA) with biconical antennas. The frequency transfer function of the channel was measured at various locations. As a result, the use of delay time parameter of the UWB standard gave the best result. It was able to use only one antenna pair to identify areas accurately. Moreover, it saved time for doing the database, reduced size of the database and reduced some cost because the number of antennas was decreased. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Indoor radar cross section measurements of aluminum hollow rod for ultra wideband applications(2015-10-01); Scattering signals, which scatter from furniture items, walls or objects in an indoor environment, affect on the received signals. Furthermore, the scatters have an effect on the radio wave propagation. Therefore, the effects of the scattering signals from the items on the radio wave propagation are investigation and analysis. For this reason, this paper presents an effect between the scattering signals and an aluminum hollow rod in a frequency range of 3.0–11.0 GHz of ultra wideband (UWB) and each angel. Then, the aluminum hollow rod was moved to follow each location in order to test for the UWB applications. An experimental set-up was set by using a vector network analyzer (VNA) for bistatic radar cross section (RCS) measurements in an indoor environment. Then, the scattering signals from the aluminum hollow rod were analyzed in term of the RCS. After that, the RCS was applied to the UWB applications.