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.

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.