知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

9 条记录 (耗时 0.015 秒)

    Sub-decimeter radio frequency ranging
    1.
    发明授权
    Sub-decimeter radio frequency ranging 有权

    公开(公告)号：US09961495B2

    公开(公告)日：2018-05-01

    申请号：US15072592

    申请日：2016-03-17

    申请人： Massachusetts Institute of Technology

    发明人： Dina Katabi ,  Deepak Vasisht ,  Swarun Suresh Kumar

    IPC分类号： H04W24/00 ,  H04W4/02 ,  G01S11/02 ,  H04L12/26

    CPC分类号： H04W4/023 ,  G01S11/02 ,  H04L43/0852

    摘要： A system enables a single WiFi access point to localize clients to within tens of centimeters. Such a system can bring indoor positioning to homes and small businesses which typically have a single access point. A key enabler underlying the system is a novel algorithm that can compute sub-nanosecond time of flight using commodity WiFi cards. By multiplying the time of flight with the speed of light, a Wifi access point computes the distance between each of its antennas and the client, hence localizing it. An implementation on commodity WiFi cards demonstrates that the system's accuracy is comparable to state-of-the-art localization systems, which use four or five access points.

    INDOOR LOCALIZATION OF A MULTI-ANTENNA RECEIVER
    4.
    发明申请
    INDOOR LOCALIZATION OF A MULTI-ANTENNA RECEIVER 有权

    公开(公告)号：US20170299691A1

    公开(公告)日：2017-10-19

    申请号：US14689474

    申请日：2015-04-17

    申请人： Massachusetts Institute of Technology

    发明人： Swarun Suresh Kumar ,  Stephanie Gil ,  Dina Katabi ,  Daniela Rus

    IPC分类号： G01S5/10 ,  G01S5/02

    CPC分类号： G01S5/10 ,  G01S5/0215 ,  G01S5/0247 ,  G01S5/0263 ,  G01S5/08 ,  G01S5/163

    摘要： An approach to localization in an indoor environment makes use of a multiple antenna receiver (e.g., in a smartphone, tablet, camera) and knowledge of locations of one or more radio transmitters, which may be part of a data communication infrastructure providing data communication services to devices in the environment. Successive measurements of transmissions from the transmitters are recorded at the receiver as the device is translated and rotated in the environment. Rotation related measurements are also made at the device. The radio frequency and rotation related measurements are used to infer the location and orientation, together referred to as the pose, of the device. Phase synchronization of the transmitters and the receiver are not required. In general, accuracy of the pose estimate far exceeds that achievable using radio frequency measurements without taking into consideration motion of the device, and far exceeds that achievable using the inertial measurements alone.

    SUB-DECIMETER RADIO FREQUENCY RANGING
    6.
    发明申请
    SUB-DECIMETER RADIO FREQUENCY RANGING 有权
    子系统无线电频率范围

    公开(公告)号：US20160277893A1

    公开(公告)日：2016-09-22

    申请号：US15072592

    申请日：2016-03-17

    申请人： Massachusetts Institute of Technology

    发明人： Dina Katabi ,  Deepak Vasisht ,  Swarun Suresh Kumar

    IPC分类号： H04W4/02 ,  H04L12/26

    CPC分类号： H04W4/023 ,  G01S11/02 ,  H04L43/0852

    摘要： A system enables a single WiFi access point to localize clients to within tens of centimeters. Such a system can bring indoor positioning to homes and small businesses which typically have a single access point. A key enabler underlying the system is a novel algorithm that can compute sub-nanosecond time of flight using commodity WiFi cards. By multiplying the time of flight with the speed of light, a Wifi access point computes the distance between each of its antennas and the client, hence localizing it. An implementation on commodity WiFi cards demonstrates that the system's accuracy is comparable to state-of-the-art localization systems, which use four or five access points.

    摘要翻译： 一个系统使单个WiFi接入点可以将客户端本地化到几十厘米。 这样的系统可以将室内定位带到通常具有单个接入点的家庭和小型企业。 该系统的关键推动因素是一种新颖的算法，可以使用商品WiFi卡计算亚纳秒的飞行时间。 通过将飞行时间乘以光速，Wifi接入点计算每个天线与客户端之间的距离，从而将其定位。 商品WiFi卡的实现表明，该系统的准确性与使用四个或五个接入点的最先进的本地化系统相当。

    Indoor localization of a multi-antenna receiver
    7.
    发明授权
    Indoor localization of a multi-antenna receiver 有权

    公开(公告)号：US09885774B2

    公开(公告)日：2018-02-06

    申请号：US14689474

    申请日：2015-04-17

    申请人： Massachusetts Institute of Technology

    发明人： Swarun Suresh Kumar ,  Stephanie Gil ,  Dina Katabi ,  Daniela Rus

    IPC分类号： G01S5/08 ,  G01S5/10 ,  G01S5/02

    CPC分类号： G01S5/10 ,  G01S5/0215 ,  G01S5/0247 ,  G01S5/0263 ,  G01S5/08 ,  G01S5/163

    摘要： An approach to localization in an indoor environment makes use of a multiple antenna receiver (e.g., in a smartphone, tablet, camera) and knowledge of locations of one or more radio transmitters, which may be part of a data communication infrastructure providing data communication services to devices in the environment. Successive measurements of transmissions from the transmitters are recorded at the receiver as the device is translated and rotated in the environment. Rotation related measurements are also made at the device. The radio frequency and rotation related measurements are used to infer the location and orientation, together referred to as the pose, of the device. Phase synchronization of the transmitters and the receiver are not required. In general, accuracy of the pose estimate far exceeds that achievable using radio frequency measurements without taking into consideration motion of the device, and far exceeds that achievable using the inertial measurements alone.

    ADAPTIVE COMMUNICATION FOR MOBILE ROUTER SYSTEMS
    8.
    发明申请
    ADAPTIVE COMMUNICATION FOR MOBILE ROUTER SYSTEMS 有权
    移动路由器系统的自适应通信

    公开(公告)号：US20160119798A1

    公开(公告)日：2016-04-28

    申请号：US14923953

    申请日：2015-10-27

    申请人： Massachusetts Institute of Technology

    发明人： Stephanie Gil ,  Swarun Suresh Kumar ,  Dina Katabi ,  Daniela Rus

    IPC分类号： H04W24/02 ,  G01S13/90 ,  H04W64/00

    CPC分类号： H04W24/02 ,  G01S3/46 ,  G01S13/90 ,  H04W24/08 ,  H04W64/003 ,  H04W64/006

    摘要： An approach to adaptively positioning a set of mobile routers to provide communication services to a set of clients makes use of estimated direction profiles of communication between routers and clients. The approach does not rely on a Euclidean model in which communication characteristics (e.g., signal strength, data rate, etc.) depend on distance between communicating nodes, and does not necessarily require sampling of communication characteristics in unproductive directions in order to move the routers to preferable locations.

    摘要翻译： 自适应地定位一组移动路由器以向一组客户端提供通信服务的方法利用估计的路由器和客户端之间的通信方向简档。 该方法不依赖于其中通信特性（例如，信号强度，数据速率等）取决于通信节点之间的距离的欧氏距离模型，并且不一定需要在非生产方向上对通信特性进行采样，以便移动路由器 到优选位置。

    LOCALIZATION WITH NON-SYNCHRONOUS EMISSION AND MULTIPATH TRANSMISSION
    9.
    发明申请
    LOCALIZATION WITH NON-SYNCHRONOUS EMISSION AND MULTIPATH TRANSMISSION 有权
    具有非同步发射和多路径传输的本地化

    公开(公告)号：US20150301152A1

    公开(公告)日：2015-10-22

    申请号：US14579232

    申请日：2014-12-22

    申请人： Massachusetts Institute of Technology

    发明人： Swarun Suresh Kumar ,  Dina Katabi

    IPC分类号： G01S3/14 ,  G01S3/46 ,  G01S3/52 ,  G01S5/02 ,  H04L27/26

    CPC分类号： G01S3/14 ,  G01S3/04 ,  G01S3/46 ,  G01S3/48 ,  G01S3/52 ,  G01S3/72 ,  G01S5/0273 ,  G01S13/48 ,  G01S13/9023 ,  G01S19/14 ,  G01S19/24 ,  G01S2013/9082 ,  H04L27/2601 ,  H04W64/00

    摘要： Directional characterization of a location of a target device makes use of multiple radio transmissions that are received from the target device. In some examples, each radio transmission is received at a first antenna at a fixed location, and is also received at a second moving antenna. The received transmissions are combined to determine the directional characterization, for example, as a distribution of power as a function of direction. In some examples, the received radio transmissions are processed to determine, for each of a plurality of directions of arrival of the radio transmissions, a most direct direction of arrival, for example, to distinguish a direct path from a reflected path from the target.

    摘要翻译： 目标设备的位置的定向表征利用从目标设备接收的多个无线电传输。 在一些示例中，在固定位置处的第一天线处接收每个无线电传输，并且还在第二移动天线处接收。 所接收的传输被组合以确定方向表征，例如作为功率的分布作为方向的函数。 在一些示例中，对于所接收的无线电传输进行处理，以确定无线电传输的多个方向的多个方向中的每一个是最直接的到达方向，例如，以将目标路径与反射路径区分开。