US 12,474,433 B2
Presence detection and recognition with Wi-Fi
Hao Chen, Plano, TX (US); Guanbo Chen, McKinney, TX (US); Hao-Hsuan Chang, Plano, TX (US); Dong Li, Plano, TX (US); and Abhishek Sehgal, Plano, TX (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 29, 2022, as Appl. No. 17/936,799.
Claims priority of provisional application 63/251,933, filed on Oct. 4, 2021.
Prior Publication US 2023/0109149 A1, Apr. 6, 2023
Int. Cl. G01S 5/02 (2010.01); G01S 13/50 (2006.01); H04W 64/00 (2009.01)
CPC G01S 5/02525 (2020.05) [G01S 13/50 (2013.01); H04W 64/006 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of a first electronic device, the method comprising:
receiving channel state information (CSI) data for at least one communication link between the first electronic device and a Wi-Fi device in a three-dimensional (3D) space, wherein the CSI data for at least one communication link includes multiple CSI amplitude values across multiple valid subcarriers from among a set of subcarriers, for each among at least one communication antenna of the first electronic device;
preprocessing the CSI data to remove one or more anomaly data points and generate preprocessed CSI data;
determining whether a motion of an object is detected within a threshold distance to the first electronic device based on the preprocessed CSI data, a detection of the motion of the object corresponding to a determination that the object is present in the 3D space, a detection of no motion of the object corresponding to a determination that the object is not present in the 3D space; and
outputting at least one of:
a first indicator indicating that the 3D space is in an empty state, in response to the determination that the object is not present in the 3D space; or
a second indicator indicating that the 3D space is in an occupied state, in response to the determination that the object is present in the 3D space.