US 12,436,230 B2
Radar device
Takuya Nakamura, Nisshin (JP)
Assigned to DENSO CORPORATION, Kariya (JP); and MIRISE Technologies Corporation, Nisshin (JP)
Filed by DENSO CORPORATION, Kariya (JP); and MIRISE Technologies Corporation, Nisshin (JP)
Filed on Feb. 23, 2023, as Appl. No. 18/173,217.
Claims priority of application No. 2022-076055 (JP), filed on May 2, 2022.
Prior Publication US 2023/0350007 A1, Nov. 2, 2023
Int. Cl. G01S 7/02 (2006.01); G01S 7/35 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/023 (2013.01) [G01S 7/354 (2013.01); G01S 13/931 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A radar device comprising:
a transmitter configured to emit a transmission signal as an electromagnetic wave;
a receiver configured to receive, as a reception signal, a reflected wave representing the electromagnetic wave reflected by an object;
a beat signal generator configured to generate a beat signal based on the transmission signal and the reception signal;
a sample signal generator configured to generate a sample signal, which is a digital signal in a time domain or a time frequency domain, based on the beat signal; and
an interference signal processing unit configured to generate an interference-removed signal obtained by removing an interference component from the sample signal, wherein
the interference signal processing unit includes:
an interference range determination unit configured to determine an interference range representing a range in which the interference component is included in the sample signal;
a modified sample signal generator configured to generate a modified sample signal by multiplying the sample signal by a reduction signal for reducing a signal intensity in the interference range;
a sample signal conversion unit configured to convert the modified sample signal into a first frequency domain sample signal in a frequency domain;
a reduction signal conversion unit configured to convert the reduction signal into a subtraction template signal in a frequency domain; and
an evaluation value calculator configured to calculate an evaluation value based on the first frequency domain sample signal and the subtraction template signal so as to determine whether a partial signal representing at least a part of the first frequency domain sample signal is derived from the reflected wave, and
the interference signal processing unit generates the interference-removed signal such that a time domain signal based on the partial signal determined as derived from the reflected wave based on the evaluation value is included in a corresponding range corresponding to the interference range of the interference-removed signal.