2021 Photonics &Amp; Electromagnetics Research Symposium (PIERS) 2021
DOI: 10.1109/piers53385.2021.9694678
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A Method of Identifying Water Level Information through WiFi Signal

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Cited by 1 publication
(2 citation statements)
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“…𝑗 represents the j-th interval of the moving variance, with 𝑗 ranging from 0 to 𝑁 βˆ’ 1, and π‘Ÿ is the sliding window radius, which is set to 20 in this paper. We traverse the entire data range and take the square of the firstorder difference of the moving variance, right-shifted one data position after, i.e., 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ 𝑑𝑖𝑓𝑓2 ,𝑗 = (𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ,𝑗+1 βˆ’ 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ,𝑗 ) 2 , to obtain the mutation or edge in the moving variance. After that, we take the average of 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ 𝑑𝑖𝑓𝑓2 ,𝑗 , traverse the coordinate axis from positive and negative directions, and find the coordinates when 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ 𝑑𝑖𝑓𝑓2 ,𝑗 is greater than a certain multiple of the average value.…”
Section: Split Action Datamentioning
confidence: 99%
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“…𝑗 represents the j-th interval of the moving variance, with 𝑗 ranging from 0 to 𝑁 βˆ’ 1, and π‘Ÿ is the sliding window radius, which is set to 20 in this paper. We traverse the entire data range and take the square of the firstorder difference of the moving variance, right-shifted one data position after, i.e., 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ 𝑑𝑖𝑓𝑓2 ,𝑗 = (𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ,𝑗+1 βˆ’ 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ,𝑗 ) 2 , to obtain the mutation or edge in the moving variance. After that, we take the average of 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ 𝑑𝑖𝑓𝑓2 ,𝑗 , traverse the coordinate axis from positive and negative directions, and find the coordinates when 𝐢𝑆𝐼 π‘£π‘Žπ‘Ÿ 𝑑𝑖𝑓𝑓2 ,𝑗 is greater than a certain multiple of the average value.…”
Section: Split Action Datamentioning
confidence: 99%
“…Thus, changes in the external environment can be obtained by analyzing the CSI data. [2] There have been many studies on fall detection using Wi-Fi. Y.…”
Section: Introductionmentioning
confidence: 99%