US 11,726,201 B2
Method for operating a radar sensor in a motor vehicle
Daniel Schindler, Ludwigsburg (DE); Gor Hakobyan, Stuttgart (DE); Johannes Fink, Karlsruhe (DE); Kai Penske, Renningen (DE); Michael Schoor, Stuttgart (DE); and Armin Himmelstoss, Weissach Im Tal (DE)
Assigned to ROBERT BOSCH GMBH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Apr. 13, 2021, as Appl. No. 17/229,533.
Claims priority of application No. 102020207879.3 (DE), filed on Jun. 25, 2020.
Prior Publication US 2021/0405184 A1, Dec. 30, 2021
Int. Cl. G01S 13/90 (2006.01); G01S 13/931 (2020.01); G01S 13/58 (2006.01)
CPC G01S 13/9029 (2013.01) [G01S 13/58 (2013.01); G01S 13/9017 (2013.01); G01S 13/931 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for operating a radar sensor in a motor vehicle, in which in a synthetic aperture radar (SAR) measuring mode according to the principle of synthetic aperture, objects, including stationary objects, are located with high angular resolution, the method comprising the following steps:
operating the same radar sensor in time-shifted manner or concurrently in the SAR measuring mode and in a Doppler measuring mode; and
measuring relative speeds of objects, including moving objects, with a time resolution in the Doppler measuring mode that is greater than a time resolution in the SAR measuring mode; and
at least one of the following steps (a)-(b):
(a) fusing together respective measuring results quantifying a same measured parameter, which are obtained in the SAR measuring mode and in the Doppler measuring mode, by a combination that differently weights the respective results according to a predefinition of respective qualities attainable by the respective ones of the measuring modes with respect to the measured parameter; and
(b) based on at least one of a determined current speed of the motor vehicle and a determined type of road currently traveled by the motor vehicle, one of:
(i) switching from one of the measuring modes to the other of the measuring modes; and
(ii) selecting relative frequencies at which the radar sensor is operated for performing measuring cycles in the Doppler measuring mode and at which the radar sensor is operated for performing measuring cycles in the SAR measuring mode, so that for a single period of a length of time, respective proportions of the period which are set to be allocated to each of the measuring modes varies depending on the at least one of the determined current speed and the determined type of road currently traveled.