US 12,256,360 B2
Method, apparatus, and system for wireless proximity detection
Yuqian Hu, Greenbelt, MD (US); Guozhen Zhu, Greenbelt, MD (US); Beibei Wang, Clarksville, MD (US); K. J. Ray Liu, Potomac, MD (US); and Oscar Chi-Lim Au, Rockville, MD (US)
Assigned to ORIGIN RESEARCH WIRELESS, INC., Rockville, MD (US)
Filed by Yuqian Hu, Greenbelt, MD (US); Guozhen Zhu, Greenbelt, MD (US); Beibei Wang, Clarksville, MD (US); K. J. Ray Liu, Potomac, MD (US); and Oscar Chi-Lim Au, Rockville, MD (US)
Filed on Oct. 12, 2023, as Appl. No. 18/379,622.
Application 18/379,622 is a continuation in part of application No. PCT/US2022/045708, filed on Oct. 4, 2022.
Application 18/379,622 is a continuation in part of application No. 17/827,902, filed on May 30, 2022.
Application 18/379,622 is a continuation in part of application No. 17/838,228, filed on Jun. 12, 2022.
Application 18/379,622 is a continuation in part of application No. 17/838,231, filed on Jun. 12, 2022.
Application 18/379,622 is a continuation in part of application No. 17/838,244, filed on Jun. 12, 2022.
Application 18/379,622 is a continuation in part of application No. 17/891,037, filed on Aug. 18, 2022, granted, now 12,078,510.
Application 18/379,622 is a continuation in part of application No. 17/945,995, filed on Sep. 15, 2022, granted, now 12,004,838.
Application 18/379,622 is a continuation in part of application No. 16/790,610, filed on Feb. 13, 2020, granted, now 11,928,894.
Application 18/379,622 is a continuation in part of application No. 16/871,004, filed on May 10, 2020, granted, now 12,046,040.
Application 18/379,622 is a continuation in part of application No. 16/909,913, filed on Jun. 23, 2020, abandoned.
Application 18/379,622 is a continuation in part of application No. 17/019,270, filed on Sep. 13, 2020, granted, now 12,036,948.
Application 18/379,622 is a continuation in part of application No. 17/149,625, filed on Jan. 14, 2021.
Application 18/379,622 is a continuation in part of application No. 17/180,766, filed on Feb. 20, 2021, granted, now 11,953,618.
Application 18/379,622 is a continuation in part of application No. 17/352,185, filed on Jun. 18, 2021, granted, now 11,906,659.
Application 18/379,622 is a continuation in part of application No. 17/352,306, filed on Jun. 20, 2021, granted, now 11,940,550.
Application 18/379,622 is a continuation in part of application No. 17/537,432, filed on Nov. 29, 2021.
Application 18/379,622 is a continuation in part of application No. 17/539,058, filed on Nov. 30, 2021, granted, now 12,066,572.
Application 18/379,622 is a continuation in part of application No. 17/959,487, filed on Oct. 4, 2022.
Application 18/379,622 is a continuation in part of application No. 17/960,080, filed on Oct. 4, 2022.
Application 18/379,622 is a continuation in part of application No. 18/108,563, filed on Feb. 10, 2023.
Application 18/379,622 is a continuation in part of application No. 18/144,321, filed on May 8, 2023, granted, now 12,153,156.
Application 18/379,622 is a continuation in part of application No. 18/199,963, filed on May 21, 2023.
Application 18/379,622 is a continuation in part of application No. 18/211,567, filed on Jun. 19, 2023, granted, now 12,044,790.
Claims priority of provisional application 63/543,717, filed on Oct. 11, 2023.
Prior Publication US 2024/0064691 A1, Feb. 22, 2024
Int. Cl. H04W 64/00 (2009.01); G01S 11/06 (2006.01)
CPC H04W 64/003 (2013.01) [G01S 11/06 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method for wireless sensing, comprising:
transmitting, by a first wireless device, a wireless signal through a wireless multipath channel in a venue;
receiving, by a second wireless device, the wireless signal through the wireless multipath channel, wherein the received wireless signal differs from the transmitted wireless signal due to the wireless multipath channel and a movement of an object in the venue;
obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the received wireless signal;
computing a spatial-temporal information (STI) based on a time-domain auto-correlation function (ACF) of channel information (CI) in a first sliding time window of the TSCI computed based on a first feature of each CI;
computing a gait score based on the STI;
computing a time series of resampled CI (TSRCI) by resampling the TSCI;
computing a proximity score based on a frequency-domain k-component correlation of resampled CI (RCI) in a second sliding time window of the TSRCI computed based on a second feature of each RCI; and
detecting a proximity state of the object to a target in the venue based on the gait score and the proximity score in a third sliding time window.