US 12,276,719 B2
Radar device and signal processing method of radar device
Sungwoo Cha, San Jose, CA (US)
Assigned to DENSO CORPORATION, Kariya (JP); MIRISE Technologies Corporation, Nisshin (JP); and TOYOTA MOTOR CORPORATION, Toyota (JP)
Filed by DENSO CORPORATION, Kairya (JP); MIRISE Technologies Corporation, Nisshin (JP); and TOYOTA MOTOR CORPORATION, Toyata (JP)
Filed on Mar. 14, 2022, as Appl. No. 17/693,772.
Claims priority of provisional application 63/168,510, filed on Mar. 31, 2021.
Prior Publication US 2022/0317277 A1, Oct. 6, 2022
Int. Cl. G01S 13/58 (2006.01); G01S 7/35 (2006.01)
CPC G01S 13/584 (2013.01) [G01S 7/356 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A radar device comprising:
a transmitter module configured to generate transmission waves based on transmission signals and to output a transmission wave at each of a plurality of predetermined angles;
a receiver module configured to receive reflected waves of the transmission waves from a target and to generate reception signals based on the reflected waves; and
a control module configured to determine information on the target based on the reception signals, wherein the information includes at least one of a speed of the target and a distance to the target,
wherein the transmitter module is configured to generate the transmission waves including:
generating a first chirp chain at a first chirp rate for a transmission wave to be output including:
generating a first transmission signal including at least one modulated signal for the transmission wave to be output at a first angle at intervals of a predetermined idle running time; and
generating a second transmission signal including at least one modulated signal for the transmission wave to be output at a second angle different from the first angle, in each interval of the idle running time;
wherein the first chirp chain repeats immediately with no time offset; and
generating a second chirp chain at a second chirp rate for the transmission wave to be output including:
generating a third transmission signal including at least one modulated signal for the transmission wave to be output at the first angle at intervals of the predetermined idle running time; and
generating a fourth transmission signal including at least one modulated signal for the transmission wave to be output at the second angle in each interval of the idle running time,
wherein the second chirp chain repeats with a time offset;
wherein the first chirp rate is different than the second chirp rate.