US 12,250,029 B2
System and method for radio frequency (RF) sensing to determine device parameters
Andrew Puayhoe See, San Diego, CA (US); Sudeepto Roy, Del Mar, CA (US); and Ramesh C. N. Rao, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM INCORPORATED, San Diego, CA (US)
Filed on Jun. 14, 2022, as Appl. No. 17/839,842.
Prior Publication US 2023/0403086 A1, Dec. 14, 2023
Int. Cl. H04B 17/12 (2015.01); H04B 17/309 (2015.01)
CPC H04B 17/12 (2015.01) [H04B 17/309 (2015.01)] 30 Claims
OG exemplary drawing
 
1. A device for RF sensing, comprising:
communication circuitry configured to communicate over an unlicensed frequency band and a licensed frequency band, the communication circuitry having:
a transmit (Tx) modulator, at least one transmitter, at least one receiver,
a receive sensing element, and one or more antennas;
the communication circuitry configured to transmit a unique signal over the unlicensed frequency band using a first antenna of the one or more antennas at a power level higher than a power level that the communication circuitry transmits a communication signal on a licensed frequency band and receive a corresponding return signal from a second antenna of the one or more antennas, the at least one receiver configured to process the corresponding return signal to determine at least an amplitude and phase (td) of the corresponding return signal; and
a look up table (LUT) having characterization information relating to the amplitude and phase (td) of the corresponding return signal, wherein the device is configured to use the characterization information to determine a use state or a gesture of the device and alter at least one operating parameter of the device based on the determined use state or gesture.