US 12,216,203 B2
Object detection device
Yu Koyama, Nisshin (JP); and Kohei Kozuki, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on May 31, 2023, as Appl. No. 18/326,765.
Application 18/326,765 is a continuation of application No. PCT/JP2021/044071, filed on Dec. 1, 2021.
Claims priority of application No. 2020-200543 (JP), filed on Dec. 2, 2020.
Prior Publication US 2023/0305143 A1, Sep. 28, 2023
Int. Cl. G01S 15/04 (2006.01); G01S 7/52 (2006.01); G01S 15/931 (2020.01)
CPC G01S 15/04 (2013.01) [G01S 7/52 (2013.01); G01S 7/52004 (2013.01); G01S 15/931 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An object detection device comprising:
a transceiver that transmits ultrasonic waves encoded with frequency modulation and receives an ultrasonic wave and outputs a reception signal;
a first quadrature detector that generates and outputs a complex reception signal based on quadrature detection of the reception signal;
a second quadrature detector that generates and outputs a complex reference signal based on quadrature detection of the reference signal;
a correlation filter that performs correlation detection between the complex reception signal and the complex reference signal and outputs a correlation signal; and
a code determiner that determines a code included in the reception signal based on the correlation signal.