	US 11,754,663 B2
	Additional feedback for location detection of device-free objects using wireless communication signals
Sungwoo Park, Seoul (KR); Wooseok Nam, San Diego, CA (US); Tao Luo, San Diego, CA (US); Junyi Li, Fairless Hills, PA (US); Juan Montojo, San Diego, CA (US); Jing Sun, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); Peter Gaal, San Diego, CA (US); Taesang Yoo, San Diego, CA (US); and Simone Merlin, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 9, 2021, as Appl. No. 17/343,476.
Claims priority of provisional application 63/038,019, filed on Jun. 11, 2020.
Prior Publication US 2021/0389407 A1, Dec. 16, 2021
Int. Cl. G01S 5/02 (2010.01); H04W 64/00 (2009.01); G01S 5/00 (2006.01); H04B 17/318 (2015.01)

CPC G01S 5/0246 (2020.05) [G01S 5/011 (2020.05); G01S 5/0284 (2013.01); H04B 17/318 (2015.01); H04W 64/006 (2013.01)]

30 Claims

1. A method of wireless sensing performed by a user equipment (UE), comprising:

measuring at least a line-of-sight (LOS) path and a non-line-of-sight (NLOS) path of a first downlink positioning reference signal (DL-PRS) from a first transmission-reception point (TRP);

measuring at least an LOS path and an NLOS path of a second DL-PRS from a second TRP;

measuring at least an LOS path and an NLOS path of a third DL-PRS from a third TRP; and

enabling a location of a non-participating target object to be determined based, at least in part, on a first reference signal time difference (RSTD) between a time of arrival (ToA) of the LOS path of the first DL-PRS and a ToA of the NLOS path of the first DL-PRS, a second RSTD between the ToA of the LOS path of the first DL-PRS and a ToA of the NLOS path of the second DL-PRS, and a third RSTD between the ToA of the LOS path of the first DL-PRS and a ToA of the NLOS path of the third DL-PRS, wherein the non-participating target object does not participate in determining the location of the non-participating target object.