US 11,906,647 B2
Person location determination using multipath
Itay Cnaan-On, Palo Alto, CA (US); Ali Rostami, Palo Alto, CA (US); Bradley Michael Eckert, Palo Alto, CA (US); and Saurabh Gupta, Palo Alto, CA (US)
Assigned to Koko Home, Inc., Palo Alto, CA (US)
Filed by Koko Home, Inc., Palo Alto, CA (US)
Filed on Apr. 26, 2023, as Appl. No. 18/139,612.
Claims priority of provisional application 63/336,836, filed on Apr. 29, 2022.
Prior Publication US 2023/0350004 A1, Nov. 2, 2023
Int. Cl. G01S 5/02 (2010.01)
CPC G01S 5/0273 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method of determining a location of a user within an indoor space, comprising:
emitting a radiofrequency signal into the indoor space;
receiving backscattered training radiofrequency signals, including multipath, for at least one location within the indoor space;
converting the received training signals into a point cloud for each location of the at least one location;
assigning a signature for each location based on the point cloud for each location;
receiving additional radiofrequency signals, including multipath;
converting the additional radiofrequency signals into an additional point cloud; and
determining a location of the user by comparing the additional point cloud to the assigned signatures.