ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,614, issued on March 18.
"Tracking a radio beacon indoor" was invented by Daniel A. Katz (Kiryat Ono, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method and devices are disclosed, for tracking a radio beacon at a mobile device, using short range RF signals, emitted by the beacon and detected at the mobile device, typically indoor, requiring no GNSS service. According to the disclosed method, the beacon is configured to broadcast short bursts, at a carefully structured difference in time of emission (DTOE), while at the tracking device, the difference in time of arrival (DTOA) of said signals is measured, and along with the DTOE, used to a...