US 12,228,673 B2
Frequency modulated continuous wave radar device and signal processing method thereof
Shun-Pin Yang, Taipei (TW); and Hsiang-Feng Chi, Taipei (TW)
Assigned to RichWave Technology Corp., Taipei (TW)
Filed by RichWave Technology Corp., Taipei (TW)
Filed on Jan. 6, 2022, as Appl. No. 17/570,343.
Claims priority of application No. 110134683 (TW), filed on Sep. 16, 2021.
Prior Publication US 2023/0078775 A1, Mar. 16, 2023
Int. Cl. G01S 7/02 (2006.01); G01S 7/35 (2006.01)
CPC G01S 7/0232 (2021.05) [G01S 7/354 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A frequency modulated continuous wave radar device, comprising:
a transmitter stage circuit, configured to transmit a transmitting signal;
a frequency synthesizer, coupled to the transmitter stage circuit, and configured to generate the transmitting signal associated with a chirp period, wherein a frequency of the transmitting signal changes with time in the chirp period;
a receiver stage circuit, configured to receive a receiving signal, wherein the receiving signal is formed after the transmitting signal is transmitted to a target object and reflected, and the receiving signal comprises a periodic interference signal with a noise period;
a pre-stage circuit, coupled to the frequency synthesizer and the receiver stage circuit, and configured to output a to-be-processed signal according to the receiving signal and the transmitting signal, wherein the to-be-processed signal comprises a plurality of frames; and
a signal processing circuit, coupled to the pre-stage circuit, wherein the signal processing circuit groups the plurality of frames into a plurality of frame groups according to a sampling frequency associated with the noise period, and the signal processing circuit generates a processed signal by sampling at least one frame from multiple frames in each of the plurality of frame groups with an identical sampling rule, so that a same sequential position of sampled frames in each of the plurality of frame groups has an identical noise influence of the periodic interference signal.