US 12,461,191 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., Los Angeles, CA (US)
Filed by Koko Home, Inc., Palo Alto, CA (US)
Filed on Dec. 20, 2023, as Appl. No. 18/391,572.
Application 18/391,572 is a continuation of application No. 18/139,612, filed on Apr. 26, 2023, granted, now 11,906,647.
Claims priority of provisional application 63/336,836, filed on Apr. 29, 2022.
Prior Publication US 2024/0125889 A1, Apr. 18, 2024
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;
assigning a signature for each location of the at least one location based on the received backscattered training radiofrequency signals;
receiving additional radiofrequency signals, including multipath; and
determining a location of the user by comparing the additional radiofrequency signals to the assigned signatures.