US 11,982,731 B2
Radar signal processing method and apparatus
Lutao Gao, Beijing (CN); Lei Wan, Beijing (CN); Sha Ma, Beijing (CN); and Sida Song, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Apr. 23, 2021, as Appl. No. 17/238,276.
Application 17/238,276 is a continuation of application No. PCT/CN2019/113249, filed on Oct. 25, 2019.
Claims priority of application No. 201811256435.7 (CN), filed on Oct. 26, 2018.
Prior Publication US 2021/0239824 A1, Aug. 5, 2021
Int. Cl. G01S 13/58 (2006.01); G01S 7/35 (2006.01); G01S 13/536 (2006.01)
CPC G01S 13/584 (2013.01) [G01S 7/352 (2013.01); G01S 13/536 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A radar signal processing method performed by a first apparatus, comprising:
transmitting a first radar signal on a first frequency band, wherein the first radar signal has a waveform of a first frequency modulated continuous wave and the first frequency modulated continuous wave is a triangular wave having a rising edge and a falling edge, the rising edge is sent in a first time unit and the falling edge is sent in a second time unit subsequent to the first time unit, and the second time unit having a same duration as the first time unit, so that the sending of the rising edge of the first frequency modulated continuous wave has a same duration as the sending of the falling edge of the first frequency modulated continuous wave;
transmitting a second radar signal on a second frequency band, wherein the second radar signal has a waveform of a second frequency modulated continuous wave, the second frequency modulated continuous wave is a triangular wave having a falling edge and a rising edge, and the falling edge is sent in the first time unit and the rising edge is sent in the second time unit subsequent to the first time unit, so that the sending of the rising edge of the second frequency modulated continuous wave has a same duration as the sending of the falling edge of the second frequency modulated continuous wave;
receiving a first reflected signal and a second reflected signal, wherein the first reflected signal is an electromagnetic wave reflected by a target object in response to the first radar signal, and the second reflected signal is an electromagnetic wave reflected by the target object in response to the second radar signal; and
obtaining at least one of distance information, velocity information, or angle information of the target object based on the received first reflected signal and/or the second reflected signal,
wherein a slope of frequency of the first radar signal and a slope of frequency of the second radar signal have a same absolute value in each time point during the sending of the first and second frequency modulated continuous waves in the first and second time units, wherein a slope is a variation of frequency of a linear frequency modulated continuous wave in a unit time,
wherein a starting moment of sending the first frequency modulated continuous wave is the same as a starting moment of sending the second frequency modulated continuous wave, and the starting moment is a beginning of the first time unit.