US 12,468,030 B2
Radar signal processing in advanced driver assistance systems
Ramesh Nepal, Auburn Hills, MI (US); Justin Hopkins, Orion Township, MI (US); Harley Pawley, Clarkston, MI (US); and Nathan Vargo, Rochester Hills, MI (US)
Assigned to Alps Alpine Co., Ltd., (JP)
Filed by Alps Alpine Co., Ltd., Tokyo (JP)
Filed on Jul. 26, 2023, as Appl. No. 18/226,318.
Prior Publication US 2025/0035778 A1, Jan. 30, 2025
Int. Cl. G01S 13/931 (2020.01); G01S 7/41 (2006.01)
CPC G01S 13/931 (2013.01) [G01S 7/414 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An advanced driver assistance system (ADAS) radar comprising:
at least one transmit antenna coupled with a vehicle, the at least one transmit antenna configured to transmit radar signals from the vehicle towards a scene of interest;
at least one receive antenna coupled with the vehicle, the at least one receive antenna configured to receive reflected radar signals; and
at least one processor configured to execute computer-executable instructions to:
obtain multiple time-samples of the reflected radar signals from the at least one receive antenna at specified periodic intervals;
execute an auto-correlation algorithm on the obtained multiple time-samples;
normalize a ratio of zeroth lag and first lag according to an output of the auto-correlation algorithm; and
compare the normalized ratio of the zeroth lag and the first lag to a specified threshold, to determine whether the reflected radar signals include an identified road clutter object.