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11.发明申请公开(公告)号：US20200003864A1
公开(公告)日：2020-01-02
申请号：US16418967
申请日：2019-05-21
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: Doppler signal processing device for detecting an object according to a received wireless signal. The Doppler signal processing device includes a frequency analysis unit for generating a frequency domain signal vector according to at least one digital signal, an interference suppression unit for performing a suppression operation according to the frequency domain signal vector and a frequency domain interference estimation signal vector to generate an interference suppressed frequency domain signal vector, an interference estimation unit for generating the frequency domain interference estimation signal vector according to the frequency domain signal vector, a detection unit for generating a result signal according to the interference suppressed frequency domain signal vector, an error detection unit for optionally providing an error detection control signal to the interference estimation unit to adjust a rate of updating the frequency domain interference estimation signal vector.
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公开(公告)号：US11614515B2
公开(公告)日：2023-03-28
申请号：US17015023
申请日：2020-09-08
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: An object recognition method includes generating a first frequency domain signal according to a first echo signal, updating at least one parameter of a primary classifier according to the first frequency domain signal and a training target corresponding to the first frequency domain signal, generating a second frequency domain signal according to a second echo signal, and generating object classification data corresponding to the second frequency domain signal according to the second frequency domain signal and the at least one parameter of the primary classifier. The object classification data is associated with presence of a second object.
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公开(公告)号：US20230014043A1
公开(公告)日：2023-01-19
申请号：US17472679
申请日：2021-09-12
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: A radar apparatus includes a transmitting analog front-end circuit, a plurality of antenna ports, a switching controller, a switching circuit, and a receiving analog front-end circuit. The transmitting analog front-end circuit generates a transmitting signal according to a carrier wave signal. A frequency of the carrier wave signal changes with time during a frequency sweep period of the carrier wave signal. The antenna ports are respectively configured to receive an echo signal corresponding to the transmitting signal. The switching controller is coupled to the transmitting analog front-end circuit and configured to generate a control signal according to the frequency sweep period of the carrier wave signal. The switching circuit is coupled to the antenna ports and the switching controller, configured to select one of the antenna ports to receive the echo signal according to the control signal, and coupled to the receiving analog front-end circuit.
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公开(公告)号：US11415665B2
公开(公告)日：2022-08-16
申请号：US16575403
申请日：2019-09-19
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: An ultra-wideband radar transceiver and an operating method thereof are provided. The ultra-wideband radar transceiver includes a receiving module. The receiving module includes an I/Q signal generator, a first sensing circuit and a second sensing circuit. The I/Q signal generator receives M consecutive echo signals and generates M consecutive in-phase signals and M consecutive quadrature-phase signals accordingly, wherein M is an integer greater than 1. The first sensing circuit is coupled to the I/Q signal generator to receive the M consecutive in-phase signals and is configured to perform integration and analog-to-digital conversion on the M consecutive in-phase signals to generate a first digital data. The second sensing circuit is coupled to the I/Q signal generator to receive the M consecutive quadrature-phase signals and is configured to perform integration and analog-to-digital conversion on the M consecutive quadrature-phase signals to generate a second digital data.
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公开(公告)号：US20220003837A1
公开(公告)日：2022-01-06
申请号：US17332995
申请日：2021-05-27
Applicant: RichWave Technology Corp.
Inventor： Wei-Min Liu , Po-Fu Wan , Han-Jieh Chang , Hsiang-Feng Chi
Abstract: An object recognition method includes generating Doppler spectrogram data according to an echo signal, the echo signal being relating to an object; transforming N sets of time-domain data of the Doppler spectrogram data corresponding to N velocities into N sets of cadence spectrogram data, respectively; combining the N sets of spectrogram data to obtain 1D/2D cadence spectrum data, and acquiring a series of cadence feature from the 1D/2D cadence spectrum data to recognize the object.
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Patent Agency Ranking
公开(公告)号：US20210231789A1
公开(公告)日：2021-07-29
申请号：US17228722
申请日：2021-04-13
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
IPC: G01S13/524
Abstract: The Doppler signal processing device includes a frequency analyzer, an interference suppressor, an interference baseline estimator and a synthesizer. The frequency analyzer can generate a frequency domain signal according to a digital signal. The interference suppressor can perform a suppression operation to generate an interference suppressed frequency domain signal. The interference baseline estimator can generate or update the frequency domain interference estimation signal according to the frequency domain signal. The synthesizer can generate an interference suppressed digital signal according to the interference suppressed frequency domain signal, where the interference suppressed digital signal is related to the digital signal with the interference energy suppressed.
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17.发明授权公开(公告)号：US10677889B2
公开(公告)日：2020-06-09
申请号：US15925722
申请日：2018-03-19
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
IPC: G01S7/02 , G01S13/58 , G01S13/02 , G01S13/26 , G01S13/34 , G01S13/00 , G01S13/32 , G01S7/282 , G01S7/285 , G01S13/06 , H04B1/707 , H04B1/7073
Abstract: A signal processing system includes a transmission module and a receiving module. The transmission module generates and transmits a transmitted radio frequency signal according to a data signal and a first spread vector. The transmission module includes a spread spectrum unit, a digital-to-analog converter and a mixer. The spread spectrum unit generates a spread spectrum signal according to the data signal and the first spread vector. The digital-to-analog unit generates an analog signal according to the spread spectrum signal. The mixer mixes the analog signal and a carrier signal so as to generate the transmitted radio frequency signal. The receiving module receives a received radio frequency signal and a second spread vector so as to generate a spectrum despread signal and generate object detection information data accordingly. The received radio frequency signal is generated by having the transmitted radio frequency signal reflected by a measured object.
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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
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.
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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
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.
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公开(公告)号：US20230035632A1
公开(公告)日：2023-02-02
申请号：US17494794
申请日：2021-10-05
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: A radar apparatus and an interference suppression method are provided. The radar apparatus includes a clock generator, an analog to digital converter (ADC), and a notch filter. The clock generator is configured to generate a sampling frequency. The ADC is coupled to the clock generator, and is configured to convert an analog signal into a digital signal according to the sampling frequency. The notch filter is coupled to the ADC, and is configured to attenuate one or more interfered frequencies of the digital signal. The interfered frequencies are related to the sampling frequency. Accordingly, the interference at a specific frequency and harmonics thereof may be suppressed.
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