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176 条记录 (耗时 0.063 秒)

    METHOD, APPARATUS, AND SYSTEM FOR ACCURATE WIRELESS MONITORING
    2.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR ACCURATE WIRELESS MONITORING 有权

    公开(公告)号：US20210091866A1

    公开(公告)日：2021-03-25

    申请号：US17113023

    申请日：2020-12-05

    申请人： Feng Zhang ,  Beibei Wang ,  Hung-Quoc Duc Lai ,  Oscar Chi-Lim Au ,  K. J. Ray Liu

    发明人： Feng Zhang ,  Beibei Wang ,  Hung-Quoc Duc Lai ,  Oscar Chi-Lim Au ,  K. J. Ray Liu

    IPC分类号： H04B17/309

    摘要： Methods, apparatus and systems for improving accuracy and efficiency of wireless monitoring are described. In one example, a described method comprises: transmitting a first wireless signal from a first wireless device with transmit antennas through a wireless multipath channel of a venue; receiving a second wireless signal by a second wireless device with receive antennas through the wireless multipath channel, wherein the second wireless signal differs from the first wireless signal due to the wireless multipath channel that is impacted by a motion of an object in the venue; obtaining a number of time series of channel information (TSCI) of the wireless multipath channel based on the second wireless signal, wherein each TSCI is associated with a respective one of the transmit antennas and a respective one of the receive antennas; preprocessing the number of TSCI; and monitoring the motion of the object based on the number of preprocessed TSCI.

    METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING WITH MOTION LOCALIZATION
    3.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR WIRELESS MONITORING WITH MOTION LOCALIZATION 有权

    公开(公告)号：US20210136515A1

    公开(公告)日：2021-05-06

    申请号：US17149625

    申请日：2021-01-14

    申请人： Feng Zhang ,  Beibei Wang ,  Hung-Quoc Duc Lai ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    发明人： Feng Zhang ,  Beibei Wang ,  Hung-Quoc Duc Lai ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    IPC分类号： H04W4/021 ,  H04B17/309 ,  H04W4/02

    摘要： Methods, apparatus and systems for wireless monitoring for motion detection and localization are described. In one example, a described system comprises: Type 1 devices; Type 2 devices; and a processor. Each Type 2 device is configured for: asynchronously receiving, from each of a respective subset of Type 1 devices associated with the Type 2 device, a respective wireless signal through a respective wireless multipath channel impacted by a motion of an object in a venue; asynchronously receiving, from each of a subset of a respective set of at least one other Type 2 device interconnected wirelessly with the Type 2 device, a respective wireless signal through a respective wireless multipath channel impacted by the motion of the object; and obtaining a set of asynchronous time series of channel information (ATSCI), wherein each ATSCI is associated with a respective wireless multipath channel and is obtained based on the asynchronously received respective wireless signal. The processor is configured for monitoring the motion of the object based on the set of ATSCI associated with each Type 2 device.

    Method, apparatus, and system for wireless material sensing
    5.
    发明授权
    Method, apparatus, and system for wireless material sensing 有权

    公开(公告)号：US11181486B2

    公开(公告)日：2021-11-23

    申请号：US17180760

    申请日：2021-02-20

    申请人： Chenshu Wu ,  Beibei Wang ,  Oscar Chi-Lim Au ,  Feng Zhang ,  K. J. Ray Liu

    发明人： Chenshu Wu ,  Beibei Wang ,  Oscar Chi-Lim Au ,  Feng Zhang ,  K. J. Ray Liu

    IPC分类号： G01N22/00 ,  G01S7/41 ,  G01S13/88 ,  G01S13/00

    摘要： Methods, apparatus and systems for wireless material sensing are described. In one example, a described system comprises: a transmitter configured for transmitting, using transmit antennas, a first wireless signal through a wireless multipath channel of a venue; a receiver configured for receiving, using receive antennas, a second wireless signal through the wireless multipath channel; and a processor. The second wireless signal comprises a reflection or a refraction of the first wireless signal at a surface of a target material of an object in the venue. The processor is configured for: obtaining a plurality of channel information (CI) of the wireless multipath channel based on the second wireless signal, wherein each CI is associated with a respective transmit antenna and a respective receive antenna; computing a material analytics based on the plurality of CI; and determining a type of the target material of the object based on the material analytics.

    Method, apparatus, and system for wireless sleep monitoring
    6.
    发明授权
    Method, apparatus, and system for wireless sleep monitoring 有权

    公开(公告)号：US11439344B2

    公开(公告)日：2022-09-13

    申请号：US16945837

    申请日：2020-08-01

    申请人： Feng Zhang ,  Beibei Wang ,  Chenshu Wu ,  Min Wu ,  Dan Bugos ,  Hangfang Zhang ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    发明人： Feng Zhang ,  Beibei Wang ,  Chenshu Wu ,  Min Wu ,  Dan Bugos ,  Hangfang Zhang ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    IPC分类号： A61B5/00 ,  A61B5/113

    摘要： Methods, apparatus and systems for wireless sleep monitoring are disclosed. In one embodiment, a described sleep monitoring system comprises: at least one sensor in a venue, wherein the at least one sensor comprises a wireless non-contact sensor having no physical contact with the user; a processor communicatively coupled to the at least one sensor; a memory communicatively coupled to the processor; and a set of instructions stored in the memory. The set of instructions, when executed by the processor, causes the processor to perform: obtaining, based on the at least one sensor, a plurality of time series of sensing features (TSSF) associated with a sleep motion of a user in the venue, and monitoring the sleep motion of the user jointly based on the plurality of TSSF. At least one TSSF of the plurality of TSSF is obtained by: communicating, based on the wireless non-contact sensor, a wireless signal in a wireless multipath channel of the venue, extracting a time series of channel information (TSCI) of the wireless multipath channel of the venue from the wireless signal, and obtaining the at least one TSSF based on the TSCI.

    Method, apparatus, and system for wireless object tracking
    7.
    发明授权
    Method, apparatus, and system for wireless object tracking 有权

    公开(公告)号：US11340345B2

    公开(公告)日：2022-05-24

    申请号：US16798343

    申请日：2020-02-22

    申请人： Chenshu Wu ,  Feng Zhang ,  Beibei Wang ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    发明人： Chenshu Wu ,  Feng Zhang ,  Beibei Wang ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    IPC分类号： G01S13/72 ,  G01S7/41 ,  G01S13/00

    摘要： Methods, apparatus and systems for wireless object tracking are described. In one example, a described wireless tracking system comprises: a transmitter, a receiver, and a processor. The transmitter is configured for transmitting a first wireless signal using a plurality of transmit antennas towards at least one object in a venue through a wireless multipath channel of the venue. The receiver is configured for: receiving a second wireless signal using a plurality of receive antennas through the wireless multipath channel between the transmitter and the receiver. The second wireless signal differs from the first wireless signal due to the wireless multipath channel and a modulation of the first wireless signal by the at least one object. The processor is configured for obtaining a set of channel information (CI) of the wireless multipath channel based on the second wireless signal received by the receiver, and tracking the at least one object simultaneously based on the set of CI. Each CI in the set is associated with a respective one of the plurality of transmit antennas and a respective one of the plurality of receive antennas.

    METHOD, APPARATUS, AND SYSTEM FOR FALL-DOWN DETECTION BASED ON A WIRELESS SIGNAL
    8.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR FALL-DOWN DETECTION BASED ON A WIRELESS SIGNAL 有权

    公开(公告)号：US20210173045A1

    公开(公告)日：2021-06-10

    申请号：US17180762

    申请日：2021-02-20

    申请人： Yuqian Hu ,  Feng Zhang ,  Beibei Wang ,  Chenshu Wu ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    发明人： Yuqian Hu ,  Feng Zhang ,  Beibei Wang ,  Chenshu Wu ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    IPC分类号： G01S7/41 ,  G08B21/04 ,  G01S13/00

    摘要： Methods, apparatus and systems for periodic or transient motion detection, e.g. fall event detection, based on wireless signals are described. In one example, a described system comprises: a transmitter configured for transmitting a first wireless signal through a wireless multipath channel of a venue; a receiver configured for receiving a second wireless signal through the wireless multipath channel; and a processor. The second wireless signal differs from the first wireless signal due to the wireless multipath channel that is impacted by a target motion of an object in the venue. The processor is configured for: obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the second wireless signal, computing a time series of spatial-temporal information (STI) of the object based on the TSCI, and detecting the target motion of the object based on the time series of STI (TSSTI).