US 12,282,085 B2
Radar system and control method therefor
Yan Zhu, Shanghai (CN); Jiashu Chen, Shanghai (CN); Leilei Huang, Shanghai (CN); and Wenting Zhou, Shanghai (CN)
Assigned to CALTERAH SEMICONDUCTOR TECHNOLOGY (SHANGHAI) TECHNOLOGY CO., LTD., Shanghai (CN)
Appl. No. 17/297,406
Filed by CALTERAH SEMICONDUCTOR TECHNOLOGY (SHANGHAI) CO., LTD., Shanghai (CN)
PCT Filed Jun. 17, 2019, PCT No. PCT/CN2019/091576
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2020/107867, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 201811445465.2 (CN), filed on Nov. 29, 2018.
Prior Publication US 2022/0146661 A1, May 12, 2022
Int. Cl. G01S 13/87 (2006.01); G01S 7/03 (2006.01); G01S 7/35 (2006.01); H03M 1/12 (2006.01)
CPC G01S 13/872 (2013.01) [G01S 7/03 (2013.01); G01S 7/356 (2021.05); H03M 1/12 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A radar system comprising a plurality of radar units,
wherein each of the radar units comprises:
one or more radio frequency (RF) channels, wherein each of the one or more RF channels is configured to receive a signal and generate an analog input signal according to the received signal, and
a processing module coupled to the one or more RF channels, wherein the processing module is configured to sample the analog input signal to obtain a digital signal and perform a first digital signal processing to the digital signal, thereby obtaining intermediate data, wherein the first digital signal processing includes a first-dimensional fast Fourier transform (1D-FFT), a second-dimensional fast Fourier transform (2D-FFT), and target detection,
wherein when the plurality of radar units work jointly, a designated radar unit among the plurality of radar units performs a second digital signal processing to a combination of the intermediate data provided by each of the plurality of radar units, thereby obtaining result data of the radar system,
wherein the second digital signal processing is different from the first digital signal processing and includes angle detection, and
wherein each of the plurality of radar units provides the respective intermediate data after finishing the respective target detection, only target address and information of the corresponding 2D-FFT acquired after the respective target detection are exchanged among the plurality of radar units, and the angle detection is performed only in the designated radar unit based on a combination of the target address and information of the corresponding 2D-FFT collected from all of the plurality of radar units.