A software-only change to the Bluetooth specification could add distance measuring with 30cm accuracy, according to Belgian research lab Imec. Needing only a standard Bluetooth transciever at each end of the link – so applicable to existing phones – adoption could lead to improved positioning, localisation and security. “Today’s localisation solutions merely use signal strength ...
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from Electronics Weekly https://www.electronicsweekly.com/news/research-news/modified-bluetooth-localise-30cm-2018-05/
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