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公开(公告)号：US12130379B2
公开(公告)日：2024-10-29
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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公开(公告)号：US12066516B2
公开(公告)日：2024-08-20
申请号：US17472679
申请日：2021-09-12
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
CPC classification number: G01S13/34 , G01S7/352 , H04B1/44 , G01S7/358 , G01S13/343 , G01S13/345
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：US11940551B2
公开(公告)日：2024-03-26
申请号：US17521862
申请日：2021-11-09
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
CPC classification number: G01S7/0232 , G01S7/282 , G01S13/58 , G01S13/345
Abstract: A radar detector including a radar transmitting device, a radar receiving device, an analog-to-digital converter (ADC), and a digital processing unit, and an interference suppression method using the radar detector are provided. The radar transmitting device transmits a first wireless signal. The radar receiving device receives a second wireless signal to generate an analog reference signal in response to the first wireless signal is subdued from being transmitted, and receives a third wireless signal to generate an analog main signal in response to the first wireless signal is not subdued from being transmitted. The ADC generates a digital reference signal according to the analog reference signal, and generates a digital main signal according to the analog main signal. The digital processing unit adjusts the digital or analog main signal according to the digital reference signal to correspondingly suppress interference components in the digital main signal or in the analog main signal.
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公开(公告)号：US20220179040A1
公开(公告)日：2022-06-09
申请号：US17521862
申请日：2021-11-09
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: A radar detector including a radar transmitting device, a radar receiving device, an analog-to-digital converter (ADC), and a digital processing unit, and an interference suppression method using the radar detector are provided. The radar transmitting device transmits a first wireless signal. The radar receiving device receives a second wireless signal to generate an analog reference signal in response to the first wireless signal is subdued from being transmitted, and receives a third wireless signal to generate an analog main signal in response to the first wireless signal is not subdued from being transmitted. The ADC generates a digital reference signal according to the analog reference signal, and generates a digital main signal according to the analog main signal. The digital processing unit adjusts the digital or analog main signal according to the digital reference signal to correspondingly suppress interference components in the digital main signal or in the analog main signal.
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5.发明公开公开(公告)号：US20240288537A1
公开(公告)日：2024-08-29
申请号：US18501015
申请日：2023-11-02
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
CPC classification number: G01S7/32 , G01S13/343 , G01S13/345
Abstract: The disclosure provides a radar apparatus, a signal processing circuit, and a signal processing method for radar apparatus. The radar apparatus includes a frequency synthesizer, a signal generator, and a transmitting front-end circuit. The frequency synthesizer generates a carrier signal. A frequency of the carrier signal changes with time within a sweep period of the carrier signal, and the carrier signal includes a frequency raising section and a frequency decreasing section. The signal generator generates a shaping signal. The shaping signal includes two sections. The two sections have different amplitudes. One of the two sections corresponds to a turn-around section between the frequency raising section and the frequency decreasing section. The transmitting front-end circuit is coupled to the frequency synthesizer and the signal generator and generates a transmitting signal according to the carrier signal and the shaping signal. In this way, the spurious peak on the spectrum is reduced.
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Patent Agency Ranking
公开(公告)号：US11860266B2
公开(公告)日：2024-01-02
申请号：US17169568
申请日：2021-02-08
Applicant: RichWave Technology Corp.
Inventor： Keng-Hao Liu , Han-Jieh Chang , Hsiang-Feng Chi
IPC: G01S13/56 , A61B5/0507 , A61B8/08 , G01S13/58
CPC classification number: G01S13/56 , A61B5/0507 , A61B8/488 , G01S13/58
Abstract: A method of detecting a life includes receiving an echo signal including an in-phase component and a quadrature component, performing a preprocessing procedure on the echo signal to generate a preprocessed signal, generating, according to the preprocessed signal, complex conjugate data associated with the in-phase component and the quadrature component, performing a first time-domain-to-frequency-domain transform on the complex conjugate data to generate Doppler spectrogram data comprising a plurality of positive velocity energies and a plurality of negative velocity energies, generating combined Doppler spectrogram data according to the plurality of positive velocity energies and the plurality of negative velocity energies, performing a second time time-domain-to-frequency-domain transform on the combined Doppler spectrogram data to generate spectrum data, and determining whether a life is detected according to the spectrum data.
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公开(公告)号：US11662424B2
公开(公告)日：2023-05-30
申请号：US17561653
申请日：2021-12-23
Applicant: RichWave Technology Corp.
Inventor： Chiang-Hua Yeh , Hsiang-Feng Chi
Abstract: A radar apparatus and a leakage correction method thereof are provided. The radar apparatus includes a transmitter and a receiver. The transmitter includes a sinewave signal generator. The sinewave signal generator generates a sinewave signal. The receiver includes another sinewave signal generator and a correcting circuit. The receiver receives transmitting signals including the sinewave signal from the transmitter. The sinewave signal generator of the receiver generates another sinewave signal according to the amplitude of the transmitting signals or received transmitting signals. The correcting circuit corrects leakage situation on the received transmitting signals according to another sinewave signal. The phasor of sinewave form corresponding to the leakage situation relates to the phasor of another sinewave signal. Accordingly, the performance of receiver may be improved effectively.
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公开(公告)号：US11307287B2
公开(公告)日：2022-04-19
申请号：US16663328
申请日：2019-10-24
Applicant: RichWave Technology Corp.
Inventor： Chiang-Hua Yeh , Hsiang-Feng Chi
Abstract: A radar apparatus and a leakage correction method thereof are provided. The radar apparatus includes a transmitter and a receiver. The transmitter includes a sinewave signal generator. The sinewave signal generator generates a sinewave signal. The receiver includes another sinewave signal generator and a correcting circuit. The receiver receives transmitting signals including the sinewave signal from the transmitter. The sinewave signal generator of the receiver generates another sinewave signal according to the amplitude of the transmitting signals or received transmitting signals. The correcting circuit corrects leakage situation on the received transmitting signals according to another sinewave signal. The phasor of sinewave form corresponding to the leakage situation relates to the phasor of another sinewave signal. Accordingly, the performance of receiver may be improved effectively.
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公开(公告)号：US10673444B2
公开(公告)日：2020-06-02
申请号：US16395183
申请日：2019-04-25
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
Abstract: A moving object detection circuit for detecting movement information of a measured object. The moving object detection circuit includes a mixing circuit, an analog-to-digital conversion circuit, a mixing unit, and a distance detecting unit. The mixing circuit mixed the RF carrier signal and a first analog signal to generate a second analog signal. The first analog signal is generated by a signal reflected from the measured object. The analog-to-digital conversion circuit coupled to the mixing circuit for generating a digital signal according to the second analog signal. The mixing unit mixed an IF signal and a first/second IF carrier signal to generate a first/second signal. The distance detecting unit generated a detection result according to the first signal and the second signal. The detection result is corresponding to a distance between the measured object and the moving object detection circuit.
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10.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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