US 11,903,671 B2
Frequency modulated continuous wave radar system and identity and information detection method thereof
Yao-Tsung Chang, New Taipei (TW); Yin-Yu Chen, New Taipei (TW); and Chuan-Yen Kao, New Taipei (TW)
Assigned to Wistron Corporation, New Taipei (TW)
Filed by Wistron Corporation, New Taipei (TW)
Filed on Jun. 21, 2021, as Appl. No. 17/353,797.
Claims priority of application No. 110109487 (TW), filed on Mar. 17, 2021; and application No. 110109639 (TW), filed on Mar. 17, 2021.
Prior Publication US 2022/0299628 A1, Sep. 22, 2022
Int. Cl. G01S 7/35 (2006.01); G01S 7/41 (2006.01); G01S 13/75 (2006.01); A61B 5/00 (2006.01); G01S 13/58 (2006.01); G01S 13/82 (2006.01)
CPC A61B 5/0015 (2013.01) [A61B 5/0004 (2013.01); A61B 5/7257 (2013.01); G01S 7/356 (2021.05); G01S 7/412 (2013.01); G01S 13/584 (2013.01); G01S 13/756 (2013.01); G01S 13/825 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A frequency modulated continuous wave radar system, comprising:
at least one identity tag, respectively disposed next to at least one test subject; and
a frequency modulated continuous wave radar identity recognition device, comprising:
an identity recognition control module, for transmitting a control signal to control a test identity tag of the at least one identity tag to be turned on and to make the test identity tag generate a specific tag reflection signal corresponding to an identity frequency in response to a chirp signal; and
a frequency modulated continuous wave radar, for transmitting the chirp signal, wherein the frequency modulated continuous wave radar receives at least one reflection signal of the at least one test subject and the specific tag reflection signal in response to the chirp signal, such that the frequency modulated continuous wave radar calculates and determines that the specific tag reflection signal and a specific reflection signal of the at least one reflection signal correspond to an adjacent position information;
wherein the specific reflection signal corresponds to a test subject information,
wherein the frequency modulated continuous wave radar performs a range fast Fourier transform (FFT) on an intermediate frequency signal so as to determine at least one signal intensity of at least one distance frequency of the intermediate frequency signal is greater than a preset intensity and the at least one test subject and the test identity tag are located at at least one distance corresponding to the at least one distance frequency,
wherein the frequency modulated continuous wave radar performs a Doppler fast Fourier transform on at least one component corresponding to the at least one distance frequency greater than the preset intensity of the intermediate frequency signal being performed by the range fast Fourier transform, so as to determine the identity frequency is generated at an adjacent distance of the adjacent position information and at least one phase frequency of the intermediate frequency signal located at the adjacent distance is corresponding to the test subject information.