US 12,455,362 B2
Method and apparatus for determining angle and distance of target, radar and storage medium
Yongming Huang, Jiangsu (CN); Shengheng Liu, Jiangsu (CN); Zihuan Mao, Jiangsu (CN); Ruisong Cao, Jiangsu (CN); Xiaohu You, Jiangsu (CN); and Wangdong Qi, Jiangsu (CN)
Assigned to PURPLE MOUNTAIN LABORATORIES, Jiangsu (CN)
Appl. No. 18/276,121
Filed by PURPLE MOUNTAIN LABORATORIES, Jiangsu (CN)
PCT Filed Dec. 31, 2021, PCT No. PCT/CN2021/143475
§ 371(c)(1), (2) Date Aug. 7, 2023,
PCT Pub. No. WO2022/166495, PCT Pub. Date Aug. 11, 2022.
Claims priority of application No. 202110170759.4 (CN), filed on Feb. 8, 2021.
Prior Publication US 2024/0310503 A1, Sep. 19, 2024
Int. Cl. G01S 13/42 (2006.01); G01S 7/41 (2006.01)
CPC G01S 13/42 (2013.01) [G01S 7/411 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for determining an angle and a distance of a target, comprising:
transmitting a frequency diversity signal to the target by means of a transmitter of a local radar, and receiving, by means of a receiver of the local radar, a received signal reflected by the target, wherein the receiver comprises a coprime array, and a frequency offset of the frequency diversity signal has a same coprime structure as the coprime array of the receiver;
determining an equivalent received signal vector of an extended virtual frequency diversity array according to the frequency diversity signal and the received signal, wherein the extended virtual frequency diversity array contains holes;
performing hole filling processing based on the equivalent received signal vector, so as to determine a uniform received signal vector of a uniform virtual frequency diversity array not containing the holes;
determining an equivalent received signal equation based on the uniform received signal vector, and establishing a first objective function and a first constraint condition for solving an objective optimization problem of the equivalent received signal equation; and
solving the objective optimization problem to obtain an objective solution matrix, and determining the angle and the distance of the target base on the objective solution matrix.