US 11,988,766 B2
Interference mitigation in an FMCW radar system
Christoph Schwark, Munich (DE)
Assigned to GM CRUISE HOLDINGS LLC, San Francisco, CA (US)
Filed by GM Cruise Holdings LLC, San Francisco, CA (US)
Filed on Jun. 23, 2021, as Appl. No. 17/356,469.
Claims priority of application No. 21179613 (EP), filed on Jun. 15, 2021.
Prior Publication US 2022/0397638 A1, Dec. 15, 2022
Int. Cl. G01S 7/02 (2006.01); G01S 7/40 (2006.01); G01S 13/34 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/023 (2013.01) [G01S 7/4056 (2013.01); G01S 13/34 (2013.01); G01S 13/931 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An autonomous vehicle (AV) comprising:
a radar system that comprises processing circuitry, the processing circuitry configured to perform acts comprising:
computing, for a temporal detection window and based upon a frequency-modulated continuous wave (FMCW) signal emitted by the radar system:
a velocity for a detection in a scene; and
a direction of the detection relative to the radar system;
generating a velocity-direction histogram for the detection window, wherein the velocity-direction histogram comprises bins, and further wherein the detection is assigned to a bin in the bins based upon:
the velocity assigned to the detection; and
the direction of the detection relative to the radar system;
identifying the detection as being caused by an interfering signal based upon a number of detections assigned to the bin in the velocity-direction histogram for the detection window; and
generating, based upon the FMCW signal, output data that identifies detections in the scene, wherein the detections identified in the output data fail to include the detection identified as being caused by the interfering signal, wherein the AV performs a driving maneuver based upon the output data.