US 12,442,892 B2
Radar device and position detection system
Joji Hayashi, Yokohama (JP)
Assigned to SOCIONEXT INC., Kanagawa (JP)
Filed by Socionext Inc., Kanagawa (JP)
Filed on Apr. 4, 2023, as Appl. No. 18/295,609.
Application 18/295,609 is a continuation of application No. PCT/JP2020/039461, filed on Oct. 20, 2020.
Prior Publication US 2023/0236284 A1, Jul. 27, 2023
Int. Cl. G01S 7/03 (2006.01); G01S 7/35 (2006.01); G01S 13/42 (2006.01); G01S 13/536 (2006.01)
CPC G01S 7/03 (2013.01) [G01S 7/352 (2013.01); G01S 13/42 (2013.01); G01S 13/536 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A position detection system, comprising:
a first receiver antenna outputting a first reception signal;
a second receiver antenna outputting a second reception signal, placed apart from the first receiver antenna by a first distance in a first direction;
a third receiver antenna outputting a third reception signal, placed apart from the first receiver antenna by a second distance in a second direction perpendicular to the first direction;
a fourth receiver antenna outputting a fourth reception signal, placed apart from the second receiver antenna by the second distance in the second direction and apart from the third receiver antenna by the first distance in the first direction; and
a signal processor,
wherein
the signal processor has
a first operation mode of receiving and processing the first reception signal and the second reception signal,
a second operation mode of receiving and processing the first reception signal and the third reception signal,
a third operation mode of receiving and processing the first reception signal and the fourth reception signal, and
a fourth operation mode of receiving and processing the second reception signal and the third reception signal,
3D coordinates of a target are calculated from processed results of the first operation mode and the second operation mode,
3D coordinates of the target are calculated from processed results of the third operation mode and the fourth operation mode, and
the signal processor performs
first detection operation of repeating a first time-division operation unit of performing time-division processing of the first operation mode and the second operation mode with a first period, and
second detection operation of repeating a second time-division operation unit of performing time-division processing of the third operation mode and the fourth operation mode with a second period shorter than the first period.