US 12,332,373 B2
Noise estimation with signal ramps for radar
Anant Gupta, San Diego, CA (US); Roberto Rimini, San Diego, CA (US); Sheng-Yuan Tu, San Diego, CA (US); Ahmad Bassil Zoubi, San Diego, CA (US); and Neevan Ramalingam, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 28, 2022, as Appl. No. 17/649,259.
Prior Publication US 2023/0273296 A1, Aug. 31, 2023
Int. Cl. G01S 7/02 (2006.01); G01S 7/03 (2006.01); G01S 7/292 (2006.01); G01S 13/89 (2006.01)
CPC G01S 7/2927 (2013.01) [G01S 7/023 (2013.01); G01S 7/03 (2013.01); G01S 13/89 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a wireless device, comprising:
transmitting a frequency-modulated continuous-waveform dual ramp radar signal over a time duration that sweeps from a first frequency to a second frequency at a rate over a first part of the time duration and that sweeps from the second frequency to the first frequency at the rate over a second part of the time duration, wherein a first length of the first part of the time duration is equal to a second length of the second part of the time duration;
receiving a reflection of the radar signal with a first reflected part that corresponds to the first part of the radar signal and a second reflected part that corresponds to the second part of the radar signal;
comparing the first reflected part and a time-inverted version of the second reflected part to estimate a noise pattern based at least in part on a difference in a time domain between the first reflected part and the time-inverted version of the second reflected part, wherein the noise pattern is a noise floor that is frequency dependent; and
performing an action based at least in part on the noise pattern.