PROXIMITY SENSING USING SPECTRAL ANALYSIS
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United States of America Patent
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Jul 25, 2016
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Jul 25, 2016
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Methods, systems, and devices for wireless communication are described. An access point (AP) may transmit a reference waveform that is received by a station (STA) and the AP. The AP and the STA may perform spectral analysis on the received waveform to determine spectral characteristics of the waveform. The AP may receive, from the STA, spectral characteristics for the reference waveform as received at the STA and may compare the spectral characteristics from the STA to the spectral characteristics determined by the AP. If the spectral characteristics are similar, the AP may determine that the STA is within close proximity. If the spectral characteristics are different, the AP may determine that the STA is not within close proximity. The AP may authenticate the STA based on the sensed proximity of the STA.
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