US 12,320,915 B2
Method for object classification using polarimetric radar data and device suitable therefor
Stefan Trummer, Taufkirchen (DE)
Assigned to GM Cruise Holdings LLC, San Francisco, CA (US)
Filed by Cruise Munich GmbH, Ottobrunn (DE)
Filed on Dec. 23, 2021, as Appl. No. 17/560,996.
Application 17/560,996 is a continuation of application No. 16/487,570, granted, now 12,111,414, previously published as PCT/EP2018/054548, filed on Feb. 23, 2018.
Claims priority of application No. 102017203057.7 (DE), filed on Feb. 24, 2017; application No. 102017205455.7 (DE), filed on Mar. 30, 2017; and application No. 102017210964.5 (DE), filed on Jun. 28, 2017.
Prior Publication US 2022/0187415 A1, Jun. 16, 2022
Int. Cl. G01S 7/02 (2006.01); G01S 7/41 (2006.01); G01S 13/42 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/026 (2013.01) [G01S 7/411 (2013.01); G01S 13/42 (2013.01); G01S 13/931 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An object classification system comprising:
a transmitter system configured to output alternating signals, wherein the transmitter system is configured to alternately emit a first signal with a first polarization and a second signal with a second polarization, wherein at least one of the first polarization or the second polarization comprises an elliptical polarization;
a receiver configured to detect a reflected first signal that has reflected from an object, wherein the receiver is further configured to detect a reflected second signal that has reflected from the object, wherein the receiver is yet further configured to generate a first radar image from the reflected first signal, wherein the receiver is also configured to generate a second radar image from the reflected second signal; and
a comparison system configured to perform a comparison between the first radar image and the second radar image, wherein the comparison system compares signal properties of local maxima of the reflected first signal in the first radar image and local maxima of the reflected second signal in the second radar image, wherein the object is classified based upon the comparison.