US 11,747,441 B2
Indoor/outdoor detection using wireless signals
Harsha Shirahatti, Santa Clara, CA (US); Sujeet Milind Patole, Cupertino, CA (US); Jouya Jadidian, Los Gatos, CA (US); Mikheil Tsiklauri, San Jose, CA (US); Shun Liu, Cupertino, CA (US); Vaneet Pathak, Los Altos, CA (US); Lei Wang, Santa Clara, CA (US); and Kumar Gaurav Chhokra, San Mateo, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jul. 29, 2020, as Appl. No. 16/941,810.
Prior Publication US 2022/0035001 A1, Feb. 3, 2022
Int. Cl. G01S 7/41 (2006.01); G01C 25/00 (2006.01); G01C 5/06 (2006.01); G01S 13/08 (2006.01)
CPC G01S 7/412 (2013.01) [G01C 5/06 (2013.01); G01C 25/00 (2013.01); G01S 13/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
transmitting wireless signals from an electronic device in a direction corresponding to an expected ceiling location;
receiving reflections of the wireless signals at the electronic device;
detecting a ceiling based on whether a power amplitude of the reflections is greater than or equal to a threshold value;
operating the electronic device in an outdoor mode if the power amplitude of the reflections is not greater than or equal to the threshold value; and
operating the electronic device in an indoor mode if the power amplitude of the reflections is greater than or equal to the threshold value.