US 12,135,389 B2
Methods and apparatuses for testing one or more reception paths in a radar receiver
Alexander Onic, Linz (AT); Bernhard Gstoettenbauer, Engerwitzdorf (AT); Thomas Langschwert, Kirchheim (DE); Jochen O. Schrattenecker, Reichenthal (AT); and Rainer Stuhlberger, Puchenau (AT)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Dec. 23, 2021, as Appl. No. 17/560,366.
Application 17/560,366 is a continuation of application No. 16/285,863, filed on Feb. 26, 2019, granted, now 11,269,055.
Claims priority of application No. 102018104729.0 (DE), filed on Mar. 1, 2018.
Prior Publication US 2022/0113375 A1, Apr. 14, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 7/40 (2006.01); G01R 31/28 (2006.01); G01S 7/35 (2006.01); G01S 13/34 (2006.01)
CPC G01S 7/4021 (2013.01) [G01R 31/2822 (2013.01); G01S 7/352 (2013.01); G01S 13/34 (2013.01); G01S 7/4056 (2013.01); G01S 7/4069 (2021.05)] 17 Claims
OG exemplary drawing
 
1. A method for testing a radar reception path, wherein the radar reception path comprises a mixer and a downstream signal processing circuit, the method comprising:
injecting a test signal into the radar reception path so that at least a first test tone having a first test tone frequency in a passband of the downstream signal processing circuit and a second test tone having a second test tone frequency outside the passband are present on the radar reception path downstream of the mixer; and
determining a characteristic of the radar reception path based on a first characteristic of a baseband signal at the first test tone frequency and a second characteristic of the baseband signal at the second test tone frequency.