公开(公告)号：US20240187112A1

公开(公告)日：2024-06-06

申请号：US18082592

申请日：2022-12-16

Applicant: RichWave Technology Corp.

Inventor： Shun-Pin Yang

IPC: H04B17/21 ,  H03D3/00 ,  H04B17/00

CPC classification number: H04B17/21 ,  H03D3/008 ,  H04B17/0085 ,  H03D2200/0047

Abstract: A direct current (DC) offset calibration device and a method are used to calibrate a DC offset of a unit. The DC offset calibration device includes a signal generation unit, a to-be-calibrated unit, a measurement unit, and a compensation unit. The DC offset calibration method includes: using the to-be-calibrated unit to output a clipped signal resulting from a signal saturation effect; receiving a receiving signal correlated to the clipped signal, the receiving signal including an even harmonic resulting from the clipped signal; measuring a magnitude of the even harmonic to obtain a DC offset adjustment value accordingly; and adjusting the to-be-calibrated unit according to the DC offset adjustment value to calibrate the DC offset.

公开(公告)号：US12228673B2

公开(公告)日：2025-02-18

申请号：US17570343

申请日：2022-01-06

Applicant: RichWave Technology Corp.

Inventor： Shun-Pin Yang ,  Hsiang-Feng Chi

IPC: G01S7/02 ,  G01S7/35

Abstract: A frequency modulated continuous wave (FMCW) radar device and a signal processing method thereof are provided. The frequency modulated continuous wave radar device includes a transmitter stage circuit, a frequency synthesizer, a receiver stage circuit, a pre-stage circuit, and a signal processing circuit. The transmitter stage circuit transmits a transmitting signal. The frequency synthesizer generates the transmitting signal associated with a chirp period. The receiver stage circuit receives a receiving signal including a periodic interference signal with a noise period associated with the chirp period. The pre-stage circuit outputs a to-be-processed signal including multiple frames according to the receiving signal and the transmitting signal. The signal processing circuit groups the frames into multiple frame groups. The signal processing circuit generates a processed signal by sampling at least one frame from the multiple frames in each of the frame groups with an identical sampling rule.

公开(公告)号：US20230078775A1

公开(公告)日：2023-03-16

申请号：US17570343

申请日：2022-01-06

Applicant: RichWave Technology Corp.

Inventor： Shun-Pin Yang ,  Hsiang-Feng Chi

IPC: G01S7/02 ,  G01S7/35

Abstract: A frequency modulated continuous wave (FMCW) radar device and a signal processing method thereof are provided. The frequency modulated continuous wave radar device includes a transmitter stage circuit, a frequency synthesizer, a receiver stage circuit, a pre-stage circuit, and a signal processing circuit. The transmitter stage circuit transmits a transmitting signal. The frequency synthesizer generates the transmitting signal associated with a chirp period. The receiver stage circuit receives a receiving signal including a periodic interference signal with a noise period associated with the chirp period. The pre-stage circuit outputs a to-be-processed signal including multiple frames according to the receiving signal and the transmitting signal. The signal processing circuit groups the frames into multiple frame groups. The signal processing circuit generates a processed signal by sampling at least one frame from the multiple frames in each of the frame groups with an identical sampling rule.