US 12,442,891 B2
Radar interference mitigation
Dan Zhang, San Diego, CA (US); Kapil Gulati, Belle Mead, NJ (US); and Junyi Li, Franklin Park, NJ (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Apr. 28, 2021, as Appl. No. 17/243,518.
Prior Publication US 2022/0349985 A1, Nov. 3, 2022
Int. Cl. G01S 7/02 (2006.01); G01S 7/00 (2006.01); G01S 7/35 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/023 (2013.01) [G01S 7/006 (2013.01); G01S 7/0232 (2021.05); G01S 7/0235 (2021.05); G01S 7/354 (2013.01); G01S 13/931 (2013.01); G01S 2013/9316 (2020.01)] 27 Claims
OG exemplary drawing
 
1. A method for wireless communications at a vehicle, comprising:
receiving, from a second vehicle, an indication of an offset value, the offset value between radar waveforms transmitted by a first radar transmitter and a second radar transmitter of a plurality of radar transmitters of the vehicle, wherein the offset value is based at least in part on a range value associated with a range of interest, and wherein the offset value comprises a time offset;
determining a configuration for transmitting a radar waveform by the plurality of radar transmitters of the vehicle, the configuration indicating a frequency range associated with the radar waveform and indicating to sweep the radar waveform over the frequency range over time;
transmitting, by the first radar transmitter, a first instance of the radar waveform in accordance with the configuration;
transmitting, by the second radar transmitter, a second instance of the radar waveform that is offset from the first instance of the radar waveform by the offset value in accordance with the configuration, wherein the second instance of the radar waveform at least partially overlaps with the first instance of the radar waveform in time in accordance with the time offset;
identifying interference between the first instance of the radar waveform and the second instance of the radar waveform associated with a ghost object located beyond an upper distance value of the range of interest;
applying a filter to the interference based at least in part on the offset value; and
identifying at least one object based at least in part on applying the filter and transmitting the first instance of the radar waveform and the second instance of the radar waveform.