US 11,656,350 B2
Radar proximity detection with flexible FOV
Ariel Sagi, Haifa (IL); Evyatar Hemo, Kiryat Bialik (IL); Evgeny Levitan, Haifa (IL); Gal Basson, Haifa (IL); and Sharad Sambhwani, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on May 21, 2020, as Appl. No. 16/880,148.
Claims priority of provisional application 62/932,176, filed on Nov. 7, 2019.
Claims priority of provisional application 62/858,597, filed on Jun. 7, 2019.
Prior Publication US 2022/0350010 A1, Nov. 3, 2022
Int. Cl. G01S 13/87 (2006.01); G01S 13/04 (2006.01); G01S 13/56 (2006.01); G01S 13/88 (2006.01); G01S 13/06 (2006.01); G01S 13/58 (2006.01)
CPC G01S 13/87 (2013.01) [G01S 13/04 (2013.01); G01S 13/06 (2013.01); G01S 13/56 (2013.01); G01S 13/58 (2013.01); G01S 13/88 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A method of operating a radar system to perform radar proximity detection, the method comprising:
in an omnidirectional proximity sensing mode:
transmitting, with a transmitter of the radar system, a first set of radio frequency (RF) pulses, the first set of RF pulses comprising one or more pulses;
receiving, with a receiver of the radar system, at least one first reflected pulse;
determining, with a processing unit, an object's presence within a threshold distance of the radar system, based on the receiving the at least one first reflected pulse; and
in response to determining the object's presence, operating in a directional proximity sensing mode; and
in the directional proximity sensing mode:
transmitting, with a transmitter antenna array of the transmitter, a second set of RF pulses, the second set of RF pulses comprising a plurality of pulses;
receiving, with a receiver antenna array of the receiver, at least one second reflected pulse, the at least one second reflected pulse comprising at least one RF pulse from the second set of RF pulses reflected off of the object; and
determining, based on the transmitting of the second set of RF pulses and the receiving of the at least one second reflected pulse:
a proximity of the object, and
whether the object is within a predetermined field of view (FOV), wherein determining whether the object is within the predetermined FOV comprises comparing a value of an SNR sensed within the predetermined FOV to a mean of values sensed outside the predetermined FOV.