US 12,294,406 B2
Static target detection for RF sensing in full-duplex communication systems
Seyong Park, San Diego, CA (US); Alexandros Manolakos, Escondido, CA (US); Weimin Duan, San Diego, CA (US); Gokul Sridharan, Sunnyvale, CA (US); Jay Kumar Sundararajan, San Diego, CA (US); Muhammad Sayed Khairy Abdelghaffar, San Jose, CA (US); Naga Bhushan, San Diego, CA (US); Wanshi Chen, San Diego, CA (US); Taesang Yoo, San Diego, CA (US); Hwan Joon Kwon, San Diego, CA (US); Krishna Kiran Mukkavilli, San Diego, CA (US); and Tingfang Ji, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Aug. 25, 2021, as Appl. No. 17/411,312.
Claims priority of provisional application 63/070,708, filed on Aug. 26, 2020.
Prior Publication US 2022/0069860 A1, Mar. 3, 2022
Int. Cl. H04B 1/525 (2015.01); H04L 1/00 (2006.01); H04L 5/14 (2006.01); H04W 4/02 (2018.01); H04W 4/40 (2018.01)
CPC H04B 1/525 (2013.01) [H04L 5/1461 (2013.01); H04W 4/023 (2013.01); H04L 1/0003 (2013.01); H04W 4/40 (2018.02)] 16 Claims
OG exemplary drawing
 
1. A method of operating a communications transceiver system to detect static objects, the method comprising:
transmitting radio frequency (RF) signals using a transmit (Tx) antenna of the communications transceiver system;
while transmitting the RF signals, performing a translational movement of either or both of the Tx antenna or a receive (Rx) antenna of the communications transceiver system, the translational movement comprising either or both of:
a first movement along an axis defined by a line extending from the communications transceiver system to the static object, or
a second movement in a plane perpendicular to the axis;
receiving, via the Rx antenna, reflected RF signals, the reflected RF signals corresponding to at least a portion of the transmitted RF signals reflecting off the static object; and
determining a location of the static object based at least in part on the reflected RF signals, wherein determining the location of the static object comprises:
conducting self-interference mitigation, the self-interference mitigation comprising:
distinguishing the static object from self-interference based at least in part on either or both of:
an angular diversity of the reflected RF signals being introduced at least in part by the second movement, or
a Doppler signature of the reflected RF signals being introduced at least in part by the first movement; and
providing compensation for the translational movement of either or both of the Tx antenna or the Rx antenna.