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公开(公告)号：US11500056B2
公开(公告)日：2022-11-15
申请号：US16871000
申请日：2020-05-10
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 tracking with graph-based particle filtering are described. A described wireless monitoring system comprises a transmitter transmitting a series of probe signals, a receiver, and a processor. The receiver is configured for: receiving the series of probe signals modulated by the wireless multipath channel and an object moving in a venue, and obtaining a time series of channel information (TSCI) of the wireless multipath channel from the series of probe signals. The processor is configured for: monitoring a motion of the object relative to a map based on the TSCI, determining an incremental distance travelled by the object in an incremental time period based on the TSCI, and computing a next location of the object at a next time in the map based on at least one of: a current location of the object at a current time, the incremental distance, and a direction of the motion during the incremental time period.
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公开(公告)号：US20210190702A1
公开(公告)日：2021-06-24
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
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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公开(公告)号：US20220386945A1
公开(公告)日：2022-12-08
申请号：US17888429
申请日：2022-08-15
申请人： Chenshu Wu , Beibei Wang , Oscar Chi-Lim Au , Hung-Quoc Duc Lai , K. J. Ray Liu
发明人： Chenshu Wu , Beibei Wang , Oscar Chi-Lim Au , Hung-Quoc Duc Lai , K. J. Ray Liu
IPC分类号： A61B5/00 , A61B5/0507 , A61B5/11
摘要： Methods, apparatus and systems for radio-based sleep tracking are described. In one example, a described system comprises: a transmitter configured to transmit a first wireless signal through a wireless multipath channel in a venue; a receiver configured to receive a second wireless signal through the wireless multipath channel, wherein the second wireless signal differs from the first wireless signal due to the wireless multipath channel which is impacted by a sleeping motion of an object in the venue; and a processor. 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 N1 components, wherein N1 is a positive integer larger than one, computing N1 component-wise analytics each associated with one of the N1 components of the TSCI, identifying N2 largest component-wise analytics among the N1 component-wise analytics, wherein N2 is a positive integer less than N1 computing at least one first motion statistics based on the N2 largest component-wise analytics of the TSCI, and monitoring the sleeping motion of the object based on the at least one first motion statistics.
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公开(公告)号：US11500057B2
公开(公告)日：2022-11-15
申请号：US17214836
申请日：2021-03-27
申请人： Yuqian Hu , Beibei Wang , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Yuqian Hu , Beibei Wang , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wirelessly tracking keystrokes on a surface are described. In one example, a described system comprises: a transmitter configured for transmitting, using a transmit antenna, a first wireless signal through a wireless channel of a venue including the surface; a receiver configured for receiving, using a plurality of receive antennas, a second wireless signal through the wireless channel, wherein the second wireless signal comprises a reflection of the first wireless signal by at least one moving object in the venue; and a processor. The processor is configured for: obtaining, regarding each receive antenna, a time series of channel information (CI) of the wireless channel based on the second wireless signal, detecting at least one keystroke on the surface based on the time series of CI (TSCI) obtained regarding each receive antenna, determining at least one location of the at least one keystroke on the surface, and determining at least one key associated with the at least one keystroke based on the at least one location.
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公开(公告)号：US11448728B2
公开(公告)日：2022-09-20
申请号：US17492598
申请日：2021-10-02
摘要： Methods, apparatus and systems for sound sensing based on radio signals are described. In one example, a described system comprises: a transmitter configured to transmit a first wireless signal through a wireless channel of a venue; a receiver configured to receive a second wireless signal through the wireless channel, wherein the second wireless signal comprises a reflection of the first wireless signal by at least one object in the venue; and a processor. The processor is configured for: obtaining a time series of channel information (CI) of the wireless channel based on the second wireless signal, determining a presence of a vibrating object in the venue based on the time series of CI (TSCI), extracting a sound signal from the TSCI, and reconstructing at least one speech based on the sound signal.
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16.发明申请公开(公告)号：US20210247483A1
公开(公告)日：2021-08-12
申请号：US17214838
申请日：2021-03-27
申请人： Fengyu Wang , Beibei Wang , Xiaolu Zeng , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Fengyu Wang , Beibei Wang , Xiaolu Zeng , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wireless vital monitoring are described. In one example, a described system comprises: a transmitter configured for transmitting a first wireless signal through a wireless channel of a venue; a receiver configured for receiving a second wireless signal through the wireless channel; and a processor. The second wireless signal comprises a reflection of the first wireless signal by at least one living being having at least one repetitive motion in the venue. The processor is configured for: obtaining a time series of channel information (TSCI) of the wireless channel based on the second wireless signal; generating, for each living being of the at least one living being, a vital signal representing all repetitive motions of the living being based on the TSCI; extracting, from the vital signal of each living being, a heartbeat signal; and monitoring, for each living being in the venue, a heart rate variability based on the heartbeat signal.
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公开(公告)号：US20210215788A1
公开(公告)日：2021-07-15
申请号：US17214836
申请日：2021-03-27
申请人： Yuqian Hu , Beibei Wang , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Yuqian Hu , Beibei Wang , Chenshu Wu , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wirelessly tracking keystrokes on a surface are described. In one example, a described system comprises: a transmitter configured for transmitting, using a transmit antenna, a first wireless signal through a wireless channel of a venue including the surface; a receiver configured for receiving, using a plurality of receive antennas, a second wireless signal through the wireless channel, wherein the second wireless signal comprises a reflection of the first wireless signal by at least one moving object in the venue; and a processor. The processor is configured for: obtaining, regarding each receive antenna, a time series of channel information (CI) of the wireless channel based on the second wireless signal, detecting at least one keystroke on the surface based on the time series of CI (TSCI) obtained regarding each receive antenna, determining at least one location of the at least one keystroke on the surface, and determining at least one key associated with the at least one keystroke based on the at least one location.
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公开(公告)号：US20240175983A1
公开(公告)日：2024-05-30
申请号：US18401681
申请日：2024-01-01
申请人： Guozhen Zhu , Beibei Wang , Weihang Gao , Yuqian Hu , Chenshu Wu , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Guozhen Zhu , Beibei Wang , Weihang Gao , Yuqian Hu , Chenshu Wu , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wireless sensing based on deep learning are described. For example, a described method comprises: transmitting a wireless signal through a wireless multipath channel of a venue, wherein the wireless multipath channel is impacted by a motion of an object in the venue; receiving the wireless signal through the wireless multipath channel of the venue, wherein the received wireless signal differs from the transmitted wireless signal due to the wireless multipath channel and the motion of the object; obtaining a time series of channel information (TSCI) of the wireless multipath channel based on the received wireless signal; computing a plurality of autocorrelation functions based on the TSCI, each autocorrelation function (ACF) computed based on CI of the TSCI in a respective sliding time window; constructing at least one ACF vector, wherein each respective ACF vector is a vector associated with a respective ACF comprising multiple vector elements each associated with a respective time lag, each vector element being a value of the respective ACF evaluated at the respective time lag; rearranging the at least one ACF vector into rearranged ACF data, wherein each ACF vector is a one-dimensional (1D) ACF-block; and performing a wireless sensing task based on a task engine to do a processing using the rearranged ACF data as an input.
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公开(公告)号：US11639981B2
公开(公告)日：2023-05-02
申请号：US17492642
申请日：2021-10-03
申请人： Chenshu Wu , Beibei Wang , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Chenshu Wu , Beibei Wang , Xiaolu Zeng , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for movement tracking are described. In one example, a described system comprises: at least one sensor configured to generate at least one sensing information (SI); a memory; a processor communicatively coupled to the memory and the at least one sensor; and a set of instructions stored in the memory. The set of instructions, when executed by the processor, cause the processor to: obtain at least one time series of SI (TSSI) from the at least one sensor, analyze the at least one TSSI, track a movement of an object in a venue based on the at least one TSSI, compute an incremental distance associated with the movement of the object in a first incremental time period based on the at least one TSSI, compute a direction associated with the movement of the object in a second incremental time period based on the at least one TSSI, and compute a next location of the object at a next time based on at least one of: a current location of the object at a current time, a current orientation of the object at the current time, the incremental distance, the direction, or a map of the venue.
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公开(公告)号：US20210311166A1
公开(公告)日：2021-10-07
申请号：US17352185
申请日：2021-06-18
申请人： Chenshu Wu , Beibei Wang , Peng Zan , Sai Deepika Regani , Xiaolu Zeng , Hung-Quoc Duc Lai , K. J. Ray Liu , Oscar Chi-Lim Au
发明人： Chenshu Wu , Beibei Wang , Peng Zan , Sai Deepika Regani , Xiaolu Zeng , Hung-Quoc Duc Lai , K. J. Ray Liu , Oscar Chi-Lim Au
摘要： Methods, apparatus and systems for wirelessly monitoring a micro motion of an object 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 and a 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, wherein each channel information (CI) of the TSCI comprises N1 CI components; selecting N2 CI components from the N1 CI components based on a first analysis of the N1 CI components; computing a micro-motion (MM) statistics based on the N2 selected CI components and the first analysis; monitoring the motion of the object based on a second analysis of the MM statistics; performing a task based on the first analysis and the second analysis; and generating a response based on the task, the first analysis and the second analysis.
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