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21.发明授权公开(公告)号：US11520031B2
公开(公告)日：2022-12-06
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：US20220120850A1
公开(公告)日：2022-04-21
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.-
公开(公告)号：US11187784B2
公开(公告)日：2021-11-30
申请号：US16368878
申请日：2019-03-29
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
IPC: G01S7/35 , G01S13/56 , G01S13/536
Abstract: A phase information extraction circuit includes a first mixer circuit for generating a second analog signal by mixing a carrier signal with a first analog signal generated by a transmitted signal reflected by the object, an analog-to-digital converter (ADC) coupled to the first mixer circuit for generating a first digital signal according to the second analog signal, an in-phase quadrature (I/Q) signal generator coupled to the ADC for generating a digital I signal and a digital Q signal according to the first digital signal, and a first phase acquisition unit for extracting phase information according to the digital I signal and the digital Q signal.
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公开(公告)号：US20210255302A1
公开(公告)日：2021-08-19
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 , G01S13/58 , A61B8/08 , A61B5/0507
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：US12174289B2
公开(公告)日：2024-12-24
申请号：US17228722
申请日：2021-04-13
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
IPC: G01S13/52 , G01S7/02 , G01S13/524 , G01S13/53
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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Patent Agency Ranking
公开(公告)号：US12038524B2
公开(公告)日：2024-07-16
申请号：US17557047
申请日：2021-12-21
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
CPC classification number: G01S7/023 , G01S7/2922 , G01S13/583 , G01S2013/0272
Abstract: A Doppler radar apparatus including a transmitting device, a receiving device and a narrowband interference suppression device is provided. The transmitting device is configured to transmit a first wireless signal. The receiving device is coupled to the transmitting device and is configured to receive a second wireless signal to generate a first digital signal. The first digital signal includes a Doppler signal component and a narrowband interference signal component, and a bandwidth of the narrowband interference signal component is smaller than a bandwidth of the Doppler signal component. The narrowband interference suppression device is coupled to the receiving device and is configured to perform interference suppression on the first digital signal to suppress the narrowband interference signal component in the first digital signal to generate an output digital signal.
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公开(公告)号：US20230184882A1
公开(公告)日：2023-06-15
申请号：US17557047
申请日：2021-12-21
Applicant: RichWave Technology Corp.
Inventor： Hsiang-Feng Chi
CPC classification number: G01S7/023 , G01S7/2922 , G01S13/583 , G01S2013/0272
Abstract: A Doppler radar apparatus including a transmitting device, a receiving device and a narrowband interference suppression device is provided. The transmitting device is configured to transmit a first wireless signal. The receiving device is coupled to the transmitting device and is configured to receive a second wireless signal to generate a first digital signal. The first digital signal includes a Doppler signal component and a narrowband interference signal component, and a bandwidth of the narrowband interference signal component is smaller than a bandwidth of the Doppler signal component. The narrowband interference suppression device is coupled to the receiving device and is configured to perform interference suppression on the first digital signal according to the first wireless signal to suppress the narrowband interference signal component in the first digital signal to generate an output digital signal.
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公开(公告)号：US20210103026A1
公开(公告)日：2021-04-08
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：US20200150223A1
公开(公告)日：2020-05-14
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：US20190379386A1
公开(公告)日：2019-12-12
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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