US 12,449,528 B2
Signal detection method and apparatus, and radar system
Shaofeng Xu, Xi'an (CN); Qiyong Zhao, Shenzhen (CN); and Yutang Zhu, Shenzhen (CN)
Assigned to Shenzhen Yinwang Intelligent Technologies Co., Ltd., Shenzhen (CN)
Filed by SHENZHEN YINWANG INTELLIGENT TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed on Nov. 3, 2022, as Appl. No. 17/980,359.
Application 17/980,359 is a continuation of application No. PCT/CN2021/090870, filed on Apr. 29, 2021.
Claims priority of application No. 202010371429.7 (CN), filed on May 6, 2020.
Prior Publication US 2023/0057115 A1, Feb. 23, 2023
Int. Cl. G01S 13/58 (2006.01); G01S 7/35 (2006.01); G01S 13/931 (2020.01)
CPC G01S 13/584 (2013.01) [G01S 7/356 (2021.05); G01S 13/931 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A signal detection method, comprising:
transmitting, by a first radar, a first sounding signal in a first time period of a first frame;
transmitting, by the first radar, a second sounding signal in a second time period of the first frame;
receiving, by the first radar, reflected signals corresponding to the first sounding signal and the second sounding signal;
performing, by the first radar, first-dimensional Fourier transform processing on a second reflected signal;
performing, by the first radar based on a code phase of the second sounding signal, phase code demodulation on the second reflected signal obtained through first-dimensional Fourier transform processing;
performing, by the first radar, second-dimensional Fourier transform processing on the second reflected signal obtained through the phase code demodulation, to obtain a second distance-velocity spectrum; and
determining, by the first radar, a false alarm target based on a difference between a first distance-velocity spectrum and the second distance-velocity spectrum, wherein
the second sounding signal is a signal obtained through first phase code modulation based on the first sounding signal, the first distance-velocity spectrum is obtained based on a first reflected signal corresponding to the first sounding signal, and the second distance-velocity spectrum is obtained based on the second reflected signal corresponding to the second sounding signal.