US 12,455,345 B2
Radar system, and signal processing method and apparatus
Qiang Li, Beijing (CN)
Assigned to Shenzhen Yinwang Intelligent Technologies Co., Ltd., Shenzhen (CN)
Filed by SHENZHEN YINWANG INTELLIGENT TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Sep. 13, 2022, as Appl. No. 17/943,898.
Application 17/943,898 is a continuation of application No. PCT/CN2020/079236, filed on Mar. 13, 2020.
Prior Publication US 2023/0003833 A1, Jan. 5, 2023
Int. Cl. G01S 7/295 (2006.01); G01S 7/02 (2006.01); G01S 7/292 (2006.01)
CPC G01S 7/295 (2013.01) [G01S 7/0232 (2021.05); G01S 7/0235 (2021.05); G01S 7/2921 (2013.01); G01S 7/2923 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A radar system, comprising a transmitting assembly, a receiving assembly, and a controller, wherein
the transmitting assembly is configured to generate and transmit N first signals, wherein characteristics of the N first signals are different, the characteristic comprises at least one of a wavelength or a delay, and N is an integer greater than 1, wherein the transmitting assembly comprises a laser and a signal processor, wherein the laser is configured to: generate a third signal, and send the third signal to the signal processor; and the signal processor is configured to process the third signal to obtain the N first signals, wherein the signal processor comprises an optical fiber coupler, a first optical fiber, and a signal separation assembly, and the first optical fiber is separately connected to the optical fiber coupler and the signal separation assembly, and wherein
the transmitting assembly comprises at least one of a frequency multiplication crystal group or a delayer group, wherein the frequency multiplication crystal group is configured to convert a signal with a single wavelength into signals with N wavelengths, and the delayer group is configured to convert a signal with a single delay into signals with N delays, wherein the converting a signal with a single wavelength into signals with N wavelengths comprises converting the third signal into N fourth signals, and sending the N fourth signals to the delayer group, wherein wavelengths of the N fourth signals are different; and
the optical fiber coupler is configured to couple the N fourth signals to the first optical fiber, the first optical fiber is configured to transmit the N fourth signals to the signal separation assembly, and the signal separation assembly is configured to: separate the N fourth signals, and send the N separated fourth signals to the delayer group;
the receiving assembly is configured to receive a second signal; and
the controller is configured to determine, based on the characteristics of the N first signals, whether the second signal comprises an echo signal corresponding to the N first signals.