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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
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.
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2.发明授权公开(公告)号：US11408978B2
公开(公告)日：2022-08-09
申请号：US16871006
申请日：2020-05-10
申请人： Fengyu Wang , Beibei Wang , Chenshu Wu , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Fengyu Wang , Beibei Wang , Chenshu Wu , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wireless vital signs monitoring are described. In one embodiment, a described system comprises: a transmitter, a receiver, a processor. The transmitter transmits, using N1 transmit antennas, a wireless signal through a wireless multipath channel of a venue, while a first object in the venue is having a first repetitive motion. The receiver receives, using N2 receive antennas, the wireless signal through the wireless multipath channel, and extracts a plurality of time series of channel information (TSCI) of the wireless multipath channel from the wireless signal. N1 and N2 are positive integers. Each of the plurality of TSCI is associated with a transmit antenna of the transmitter and a receive antenna of the receiver. The processor computes a first information of the first repetitive motion based on the plurality of TSCI, and monitors the first repetitive motion of the first object based on the first information.
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公开(公告)号：US20210215789A1
公开(公告)日：2021-07-15
申请号：US17214841
申请日：2021-03-27
申请人： Yuqian Hu , Beibei Wang , Muhammed Zahid Ozturk , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au , Xiaolu Zeng , Chenshu Wu , Fengyu Wang
发明人： Yuqian Hu , Beibei Wang , Muhammed Zahid Ozturk , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au , Xiaolu Zeng , Chenshu Wu , Fengyu Wang
摘要： Methods, apparatus and systems for wireless proximity sensing 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 movement 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, wherein each channel information (CI) of the TSCI comprises a plurality of CI components, each of which is associated with an index; computing an inter-component statistics based on the plurality of CI components; computing, based on the inter-component statistics, a proximity information of the object with respect to a reference location in the venue; and performing a task based on the proximity information of the object.
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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
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.
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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
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.
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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
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).
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公开(公告)号：US12046040B2
公开(公告)日：2024-07-23
申请号：US16871004
申请日：2020-05-10
申请人： Fengyu Wang , Beibei Wang , Sai Deepika Regani , Feng Zhang , Chenshu Wu , Dan Bugos , Chun-Chia Jack Shih , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Fengyu Wang , Beibei Wang , Sai Deepika Regani , Feng Zhang , Chenshu Wu , Dan Bugos , Chun-Chia Jack Shih , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for counting and recognizing objects or people based on rhythmic motion monitoring are described. A described method comprises: obtaining N1 time series of channel information (TSCI) of a wireless multipath channel that is impacted by a rhythmic motion of an object in a venue, wherein the N1 TSCI is extracted from a wireless signal transmitted from a transmitter to a receiver through the wireless multipath channel; decomposing each of the N1 TSCI into N2 time series of channel information components (TSCIC), wherein a channel information component (CIC) of each of the N2 TSCIC at a time comprises a respective component of a channel information (CI) of the TSCI at the time, wherein N1 and N2 are positive integers; monitoring the rhythmic motion of the object based on at least one of: the N1*N2 TSCIC and the N1 TSCI.
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公开(公告)号：US11928894B2
公开(公告)日：2024-03-12
申请号：US16790610
申请日：2020-02-13
申请人： Chenshu Wu , Feng Zhang , Beibei Wang , Yuqian Hu , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Chenshu Wu , Feng Zhang , Beibei Wang , Yuqian Hu , K. J. Ray Liu , Oscar Chi-Lim Au
CPC分类号： G06V40/25 , G06F21/32 , G06V40/103 , H04W4/029
摘要： Methods, apparatus and systems for wireless gait recognition and rhythmic motion monitoring are described. In one example, a described system comprises: a transmitter, a receiver, and a processor. The transmitter is configured for transmitting a first wireless signal towards an object in a venue through a wireless multipath channel of the venue. The receiver is configured for: receiving a second wireless signal 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 which is impacted by a rhythmic motion of the object. The processor is configured for: obtaining a time series of channel information (CI) of the wireless multipath channel based on the second wireless signal, monitoring the rhythmic motion of the object based on the time series of CI (TSCI), and triggering a response action based on a result of the monitoring.
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公开(公告)号：US11500058B2
公开(公告)日：2022-11-15
申请号：US17214841
申请日：2021-03-27
申请人： Yuqian Hu , Beibei Wang , Muhammed Zahid Ozturk , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au , Xiaolu Zeng , Chenshu Wu , Fengyu Wang
发明人： Yuqian Hu , Beibei Wang , Muhammed Zahid Ozturk , Feng Zhang , K. J. Ray Liu , Oscar Chi-Lim Au , Xiaolu Zeng , Chenshu Wu , Fengyu Wang
摘要： Methods, apparatus and systems for wireless proximity sensing 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 movement 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, wherein each channel information (CI) of the TSCI comprises a plurality of CI components, each of which is associated with an index; computing an inter-component statistics based on the plurality of CI components; computing, based on the inter-component statistics, a proximity information of the object with respect to a reference location in the venue; and performing a task based on the proximity information of the object.
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公开(公告)号：US11531087B2
公开(公告)日：2022-12-20
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
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).
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