Mathematical Modeling of Wave Propagation Considering the Atmospheric Effects and Its Application

이태승,; 최상혁,; 전주환,; 강성철,; 박동민,

doi:10.5515/kjkiees.2016.27.2.188

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Detecting people inside a building from the outside can be challenging due to wireless signal transmission through exterior and interior walls, as well as obstacles. When signals pass through objects, refraction occurs, influenced by the refractive index of the medium they traverse [ 38 ]. Transmitting signals between exterior walls involves thick mediums with obstacles, resulting in significant refraction and signal attenuation.…”

Section: Introductionmentioning

confidence: 99%

Indoor Human Detection from a Building’s Exterior Using 433 MHz Wireless Transceivers

Kwon

2023

Sensors

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This study introduces a novel system for detecting humans inside a building by utilizing RF signals from the building’s exterior. Existing RF communication devices encounter signal attenuation issues when passing through walls, limiting their effectiveness. In contrast, our system employs a low-power, long-distance communication signal operating at 433 MHz to enhance signal permeability, enabling the accurate detection of individuals within the building. The system analyzes received signal strength indicator (RSSI) data using variance and mean analysis algorithms to determine the presence or absence of people. The evaluation results indicate promising average accuracies of 88% for the variance analysis algorithm and 97.7% for the mean analysis algorithm. The proposed system holds potential for real-world deployment, particularly in challenging scenarios such as fire incidents, where pre-installation is challenging. Continued research and development efforts aim to enhance the system’s performance and address any limitations, making it more effective and robust in various practical applications.

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Section: Introductionmentioning

confidence: 99%

Indoor Human Detection from a Building’s Exterior Using 433 MHz Wireless Transceivers

Kwon

2023

Sensors

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Analysis of Atmospheric Conditions Using Long-Range Surveillance Radar

Kang¹,

Kwon²,

Lee³

et al. 2017

J. Korean Inst. Electromagn. Eng. Sci.

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The refraction phenomenon of radio waves should be considered to improve the detection accuracy of target altitudes for long-range surveillance radars, however, it is difficult to estimate accurate refractivity of atmosphere for every location. In this paper, we propose the atmosphere evaluation metric(AEM) to estimate atmospheric conditions at target locations using target altitudes obtained from primary surveillance radar(PSR) and secondary surveillance radar(SSR). To verify the suitability of the proposed metric, we observed atmospheric conditions and calculated estimation errors of target altitudes using measured data.

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Radar Performance Variation according to the Change of Atmospheric Refractive Index

Park¹,

Jeon²,

Kim³

et al. 2021

J. Korean Inst. Electromagn. Eng. Sci.

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Factors that contribute to varying radar performance include internal causes such as equipment obsolescence, and external causes such as terrain and atmosphere. In particular, the atmosphere, which is a natural element, causes inevitable performance changes. The refractive index changes with atmospheric conditions in real time and affects the propagation environment, which affects the radar performance. Depending on the refractive index, atmospheric conditions are divided into super, sub, standard, normal, and trap, and the radar performance changes, such as the maximum detection range, occur differently during each atmospheric state. Therefore, it is important to predict and respond to changes in radar performance depending on the atmospheric conditions. In this study, the changes in the maximum detection range at low altitudes and detection performance at a long distance are analyzed using the M&S tool with respect to the refractive index. As a result, the maximum detection range decreases for a larger refractive index and vice versa, while the detection performance at a long distance changes because of abnormal atmospheric conditions.

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Mathematical Modeling of Wave Propagation Considering the Atmospheric Effects and Its Application

Cited by 3 publications

References 3 publications

Indoor Human Detection from a Building’s Exterior Using 433 MHz Wireless Transceivers

Indoor Human Detection from a Building’s Exterior Using 433 MHz Wireless Transceivers

Analysis of Atmospheric Conditions Using Long-Range Surveillance Radar

Radar Performance Variation according to the Change of Atmospheric Refractive Index

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