US 12,436,268 B2
Reconfigurable intelligent surface (RIS)-aided UE passive RF sensing
Weimin Duan, San Diego, CA (US); Alexandros Manolakos, Escondido, CA (US); and Seyong Park, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Appl. No. 18/251,205
Filed by QUALCOMM Incorporated, San Diego, CA (US)
PCT Filed Dec. 21, 2021, PCT No. PCT/US2021/073062
§ 371(c)(1), (2) Date Apr. 28, 2023,
PCT Pub. No. WO2022/164596, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 20210100053 (GR), filed on Jan. 28, 2021.
Prior Publication US 2023/0408677 A1, Dec. 21, 2023
Int. Cl. G01S 13/87 (2006.01); G01S 7/00 (2006.01); G01S 13/00 (2006.01); G01S 13/46 (2006.01)
CPC G01S 13/878 (2013.01) [G01S 7/006 (2013.01); G01S 13/003 (2013.01); G01S 2013/464 (2013.01); G01S 2013/466 (2013.01)] 37 Claims
OG exemplary drawing
 
1. A method of performing radio frequency (RF) sensing with a receiving device and a reconfigurable intelligent surface (RIS) in a wireless communications system, the method comprising:
configuring the RIS to reflect a Line-Of-Sight (LOS) wireless signal toward the receiving device, wherein the LOS wireless signal comprises a first wireless reference signal transmitted by a Transmission Reception Point (TRP) of the wireless communications system;
configuring the RIS to reflect an echo signal toward the receiving device, wherein the echo signal comprises a reflection, off of an object, of a second wireless reference signal transmitted by the TRP of the wireless communications system;
determining a position of the object based on:
a position of the RIS relative to the TRP, and
a time difference between a first Time of Arrival (ToA) of the LOS wireless signal at the receiving device and a second ToA of the echo signal at the receiving device; and
providing the position of the object.