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74 条记录 (耗时 0.045 秒)

    Method, apparatus, and system for wireless vital monitoring using high frequency signals
    63.
    发明授权
    Method, apparatus, and system for wireless vital monitoring using high frequency signals 有权

    公开(公告)号：US12004838B2

    公开(公告)日：2024-06-11

    申请号：US17945995

    申请日：2022-09-15

    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

    IPC分类号： A61B5/00 ,  A61B5/024 ,  A61B5/0507 ,  G01S13/88

    CPC分类号： A61B5/0015 ,  A61B5/0026 ,  A61B5/02405 ,  A61B5/0507 ,  A61B5/7207 ,  G01S13/88

    摘要： Methods, apparatus and systems for wireless vital sign monitoring are described. In one example, a described system comprises: a transmitter configured to transmit a wireless signal through a wireless channel of a venue; a receiver configured to receive the wireless signal through the wireless channel that is being impacted by an object motion of an object in the venue; and a processor. At least one of the transmitter or the receiver comprises an array of antennas used to transmit or receive the wireless signal. The object motion comprises at least one non-periodic body motion of the object and at least one periodic vital-sign motion of the object. The processor is configured for: segmenting space around the venue into a plurality of sectors based on a beamforming and the received wireless signal, wherein each sector of the plurality of sectors is associated with a spatial direction relative to the array of antennas, obtaining a plurality of time series of channel information (CI) of the wireless channel based on the beamforming, wherein each time series of CI (TSCI) of the plurality of TSCI is associated with a respective sector of the plurality of sectors, isolating the object motion of the object in the plurality of TSCI to generate a plurality of isolated TSCI, compensating for the at least one non-periodic body motion of the object in the plurality of isolated TSCI to generate a plurality of compensated TSCI, and monitoring the at least one periodic vital-sign motion of the object based on the plurality of compensated TSCI.

    Method, apparatus, and system for wireless motion recognition
    64.
    发明授权
    Method, apparatus, and system for wireless motion recognition 有权

    公开(公告)号：US11953618B2

    公开(公告)日：2024-04-09

    申请号：US17180766

    申请日：2021-02-20

    申请人： Sai Deepika Regani ,  Beibei Wang ,  Min Wu ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    发明人： Sai Deepika Regani ,  Beibei Wang ,  Min Wu ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    IPC分类号： G01S7/41 ,  G01S13/00 ,  G01S13/86

    CPC分类号： G01S7/415 ,  G01S13/003 ,  G01S13/86

    摘要： Methods, apparatus and systems for wireless motion recognition 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 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, tracking the motion of the object based on the TSCI to generate a gesture trajectory of the object, and determining a gesture shape based on the gesture trajectory and a plurality of pre-determined gesture shapes.

    METHOD, APPARATUS, AND SYSTEM FOR SPEECH ENHANCEMENT AND SEPARATION BASED ON AUDIO AND RADIO SIGNALS
    65.
    发明申请
    METHOD, APPARATUS, AND SYSTEM FOR SPEECH ENHANCEMENT AND SEPARATION BASED ON AUDIO AND RADIO SIGNALS 有权

    公开(公告)号：US20220291328A1

    公开(公告)日：2022-09-15

    申请号：US17827902

    申请日：2022-05-30

    申请人： Muhammed Zahid Ozturk ,  Chenshu Wu ,  Beibei Wang ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    发明人： Muhammed Zahid Ozturk ,  Chenshu Wu ,  Beibei Wang ,  K. J. Ray Liu ,  Oscar Chi-Lim Au

    IPC分类号： G01S5/06 ,  G01S5/02

    摘要： Methods, apparatus and systems for radio-assisted signal estimation are described. In one example, a described system comprises: a sensor configured to obtain a baseband mixture signal in a venue; a transmitter configured to transmit a first radio signal through a wireless channel of the venue; a receiver configured to receive a second radio signal through the wireless channel; and a processor. The baseband mixture signal comprises a mixture of a first source signal and an additional signal. The first source signal is generated by a first motion of a first object in the venue. The second radio signal differs from the first radio signal due to the wireless channel and at least the first motion of the first object in the venue. The processor is configured for: obtaining a radio feature of the second radio signal, constructing a first adaptive filter for the baseband mixture signal based on the radio feature, filtering the baseband mixture signal using the first adaptive filter to obtain a first output signal, and generating an estimation of the first source signal based on the first output signal.

    Data communication with embedded pilot information for timely channel estimation
    68.
    发明授权
    Data communication with embedded pilot information for timely channel estimation 有权
    数据通信与嵌入式导频信息及时的信道估计

    公开(公告)号：US07848443B2

    公开(公告)日：2010-12-07

    申请号：US11471521

    申请日：2006-06-21

    申请人： Chaiyod Pirak ,  Z. Jane Wang ,  K. J. Ray Liu

    发明人： Chaiyod Pirak ,  Z. Jane Wang ,  K. J. Ray Liu

    IPC分类号： H04B7/02 ,  H04B7/10 ,  H04L27/00

    CPC分类号： H04W52/367 ,  H04L25/0226 ,  H04W52/16 ,  H04W52/325 ,  H04W52/346 ,  H04W52/42

    摘要： Pilot data and data-bearer data are formed to be mutually orthogonal and in each other's null-space. Data to be transmitted is first modulated with the data-bearer matrix and then pilot data is added thereto. The pilot data may be added to each modulated symbol, thereby increasing significantly the density of pilot information available at the receiver for channel state estimation. When pilot data is added across an entire transmitted block of data, data detection performance is improved for even fast fading Rayleigh fading channels.

    摘要翻译： 导频数据和数据载体数据被形成为彼此相互正交并且彼此的零空间。 要发送的数据首先用数据承载矩阵调制，然后将导频数据加到其上。 可以将导频数据添加到每个调制符号，从而显着增加在接收机处可用于信道状态估计的导频信息的密度。 当在整个发送的数据块上添加导频数据时，即使快速衰落的瑞利衰落信道也能提高数据检测性能。

    Combined power control and space-time diversity in mobile cellular communications
    69.
    发明授权
    Combined power control and space-time diversity in mobile cellular communications 失效
    移动蜂窝通信中的组合功率控制和时空分集

    公开(公告)号：US06377812B1

    公开(公告)日：2002-04-23

    申请号：US09196226

    申请日：1998-11-20

    申请人： Farrokh Rashid-Farrokhi ,  K. J. Ray Liu ,  Leandros Tassiulas

    发明人： Farrokh Rashid-Farrokhi ,  K. J. Ray Liu ,  Leandros Tassiulas

    IPC分类号： H04Q720

    CPC分类号： H04W52/42 ,  H04B7/086 ,  H04W52/24

    摘要： In a mobile cellular communications system power control and space-time diversity are applied in combination to the uplink and downlink. In the uplink, mobile powers and equalization/diversity combining vectors at base stations are, calculated jointly, with the result that the mobile transmitted power is minimized, while the Signal to Noise Ratio (SNR) at each link is maintained above a threshold. In the downlink, a multitap transmit diversity strategy adjusts the transmit weight vectors with the result that the SNR at each mobile is set to a specified value. The combination of power control and space-time diversity apply to networks with fading channels, including networks in which the number of cochannels and multipaths are larger than the number of antenna elements. The invention achieves the optimal solution for the uplink that minimizes the mobile power, and achieves a feasible solution for the downlink if there exists any.

    摘要翻译： 在移动蜂窝通信系统中，功率控制和时空分集组合应用于上行链路和下行链路。 在上行链路中，在基站处的移动功率和均衡/分集组合向量被联合计算，结果是移动发射功率被最小化，而每个链路上的信噪比（SNR）被保持在阈值以上。 在下行链路中，多重发射分集策略调整发射权重向量，结果是将每个移动台处的SNR设置为指定值。 功率控制和时空分集的组合适用于具有衰落信道的网络，包括其中多个同步信道和多路径数量大于天线单元数量的网络。 本发明实现了使移动电力最小化的上行链路的最优解，并且如果存在任何一个，则为下行链路实现可行的解决方案。

    Method and apparatus for processing data from a tomographic imaging system
    70.
    发明授权
    Method and apparatus for processing data from a tomographic imaging system 失效
    用于从层析成像系统处理数据的方法和装置

    公开(公告)号：US5953388A

    公开(公告)日：1999-09-14

    申请号：US912838

    申请日：1997-08-18

    申请人： David Francis Walnut ,  Carlos Alberto Berenstein ,  K. J. Ray Liu ,  Farrokh Rashid-Farrokhi

    发明人： David Francis Walnut ,  Carlos Alberto Berenstein ,  K. J. Ray Liu ,  Farrokh Rashid-Farrokhi

    IPC分类号： G06T11/00 ,  A61B6/03

    CPC分类号： G06T11/006 ,  G06T2211/421 ,  Y10S378/901

    摘要： An algorithm is created and applied to reconstruct the wavelet coefficients of an image from the Radon transform data for use in computed tomography, with a disclosed method that uses the properties of wavelets to localize the Radon transform such that a local region of the cross section of a body can be reconstructed using almost completely local data to significantly reduce the amount of exposure and computations in X-ray tomography. The described algorithm is based on the observation that for some wavelet bases with sufficiently many vanishing moments, the ramp-filtered version of the scaling function as well as the wavelet function has extremely rapid decay, with the variance of the elements of the nullspace is being negligible in the locally reconstructed image.

    摘要翻译： 一种算法被创建并应用于从用于计算机断层摄影的Radon变换数据重建图像的小波系数，利用所公开的方法，使用小波的属性来定位Radon变换，使得横截面的局部区域 可以使用几乎完全的局部数据重建身体，以显着减少X射线层析成像中的暴露量和计算量。 所描述的算法基于对于具有足够多消失矩的一些小波基的观察，缩放函数的斜坡滤波版本以及小波函数具有非常快的衰减，空值空间的元素的方差正在 在本地重建的图像中可忽略不计。