US 12,092,717 B2
Feedback secured wireless ranging
Erik David Lindskog, Cupertino, CA (US)
Assigned to Samsung Electronics Co., Ltd., Yongin-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Nov. 16, 2021, as Appl. No. 17/527,980.
Claims priority of provisional application 63/273,767, filed on Oct. 29, 2021.
Claims priority of provisional application 63/125,773, filed on Dec. 15, 2020.
Prior Publication US 2022/0187434 A1, Jun. 16, 2022
Int. Cl. G01S 11/02 (2010.01); G07C 9/00 (2020.01)
CPC G01S 11/02 (2013.01) [G07C 9/00309 (2013.01); G07C 2009/00769 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by a first modem, a first training signal, from a second modem;
generating, by the first modem, a first estimate of a channel metric, based on the first training signal, the first estimate of the channel metric being based on a time of arrival and a phase shift time of arrival;
receiving, by the first modem, from the second modem, a second estimate of the channel metric;
determining, by the first modem, that the first estimate of the channel metric and the second estimate of the channel metric do not meet a similarity criterion indicative of a degree of similarity between the first estimate of the channel metric and the second estimate of the channel metric; and
denying, by the first modem, access to a resource.