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    SUPER RESOLUTION RADIO FREQUENCY LOCATION DETERMINATION
    3.
    发明申请
    SUPER RESOLUTION RADIO FREQUENCY LOCATION DETERMINATION 有权

    公开(公告)号：US20220091216A1

    公开(公告)日：2022-03-24

    申请号：US17537882

    申请日：2021-11-30

    申请人： TEXAS INSTRUMENTS INCORPORATED

    发明人： Anand DABAK ,  Marius MOE ,  Charles SESTOK

    IPC分类号： G01S3/16 ,  G01S3/48 ,  H04W64/00 ,  H04L27/26 ,  G01S3/58

    摘要： Using a phase interferometry method which utilizes both amplitude and phase allows the determination and estimation of multipath signals. To determine the location of an object, a signal that contains sufficient information to allow determination of both amplitude and phase, like a packet that includes a sinewave portion, is provided from a master device. A slave device measures the phase and amplitude of the received packet and returns this information to the master device. The slave device returns a packet to the master that contains a similar sinewave portion to allow the master device to determine the phase and amplitude of the received signals. Based on the two sets of amplitude and phase of the RF signals, the master device utilizes a fast Fourier transform or techniques like multiple signal classification to determine the indicated distance for each path and thus more accurately determines a location of the slave device.

    SUPER RESOLUTION RADIO FREQUENCY LOCATION DETERMINATION
    5.
    发明申请
    SUPER RESOLUTION RADIO FREQUENCY LOCATION DETERMINATION 审中-公开

    公开(公告)号：US20200209337A1

    公开(公告)日：2020-07-02

    申请号：US16232783

    申请日：2018-12-26

    申请人： TEXAS INSTRUMENTS INCORPORATED

    发明人： Anand DABAK ,  Marius MOE ,  Charles SESTOK

    IPC分类号： G01S3/16 ,  G01S3/48 ,  G01S3/58 ,  H04L27/26 ,  H04W64/00

    摘要： Using a phase interferometry method which utilizes both amplitude and phase allows the determination and estimation of multipath signals. To determine the location of an object, a signal that contains sufficient information to allow determination of both amplitude and phase, like a packet that includes a sinewave portion, is provided from a master device. A slave device measures the phase and amplitude of the received packet and returns this information to the master device. The slave device returns a packet to the master that contains a similar sinewave portion to allow the master device to determine the phase and amplitude of the received signals. Based on the two sets of amplitude and phase of the RF signals, the master device utilizes a fast Fourier transform or techniques like multiple signal classification to determine the indicated distance for each path and thus more accurately determines a location of the slave device.

    System for and method of accurately determining true bearings of radio frequency identification (RFID) tags associated with items in a controlled area
    9.
    发明授权
    System for and method of accurately determining true bearings of radio frequency identification (RFID) tags associated with items in a controlled area 有权
    准确地确定与控制区域中的物品相关的射频识别（RFID）标签的真实轴承的系统和方法

    公开(公告)号：US09477865B2

    公开(公告)日：2016-10-25

    申请号：US14106368

    申请日：2013-12-13

    申请人： SYMBOL TECHNOLOGIES, INC.

    发明人： Michael J Koch ,  Benjamin J Bekritsky ,  Alexander M Jacques ,  Charles B Swope

    IPC分类号： G06K7/10 ,  G01S13/75 ,  G01S13/82 ,  G01S3/46 ,  G01S3/16

    CPC分类号： G06K7/10415 ,  G01S3/16 ,  G01S3/46 ,  G01S13/75 ,  G01S13/751 ,  G01S13/825 ,  G06K7/10099 ,  G06K7/10128 ,  G06K7/10366

    摘要： A radio frequency (RF) identification (RFID) tag reading system and method accurately determine true bearings of RFID tags associated with items in a controlled area. An RFID reader has an array of antenna elements and a plurality of RF transceivers. A controller controls the transceivers by steering a primary transmit beam over the controlled area by transmitting a primary transmit signal to each tag, and steering a primary receive beam at a primary steering angle by receiving a primary receive signal from each tag. The controller thereupon steers a plurality of secondary receive offset beams at different secondary steering angles that are offset from the primary steering angle by receiving secondary receive offset signals from each tag, and by processing the offset signals to determine a true bearing for each tag.

    摘要翻译： 射频识别（RFID）标签读取系统和方法准确地确定与受控区域中的项目相关联的RFID标签的真实轴承。 RFID读取器具有天线元件阵列和多个RF收发器。 控制器通过将主要发射信号发送到每个标签，并通过从主要转向角度接收来自每个标签的主要接收信号来控制主要接收波束来控制受控区域上的主要发射波束来控制收发器。 控制器随后通过接收来自每个标签的次级接收偏移信号，并且通过处理偏移信号来确定每个标签的真实方位，引导不同次级转向角处的多个副接收偏移波束偏离主转向角。

    Receiver design for geo-location and/or phase coherent processing
    10.
    发明授权
    Receiver design for geo-location and/or phase coherent processing 有权
    地理位置和/或相位相干处理的接收机设计

    公开(公告)号：US09232489B2

    公开(公告)日：2016-01-05

    申请号：US13935872

    申请日：2013-07-05

    申请人： Dipak Roy ,  Angsuman Rudra

    发明人： Dipak Roy ,  Angsuman Rudra

    IPC分类号： H04L7/00 ,  G01S3/16 ,  H04Q7/20 ,  H04W56/00

    CPC分类号： H04W56/002 ,  H04W56/00

    摘要： A receiver system using commercially available super high-speed data converters that are able to directly digitize at multiple GHz sampling rates with sufficient accuracy to fit many radio applications. Unlike conventional receivers, no down converters or mixing stages are required. Instead it uses a bank of RF filters from which the desired RF filter, based on the frequency band of interest, is switched in. The frequency spectrum scan rate is very fast as the settling time for the simple RF front-end is small and the speed of RF switching is high. The filtered output is digitized at a multiple GHz sampling rate and all signal processing is done by FPGA or a combination of FPGA and/or a general-purpose processor.

    摘要翻译： 一种使用市售的超高速数据转换器的接收机系统，其能够以足够的精度以多GHz采样率直接数字化以适应许多无线电应用。 与传统接收机不同，不需要下变频器或混合级。 相反，它使用一组RF滤波器，根据感兴趣的频带，所需的RF滤波器被切换。频谱扫描速率非常快，因为简单RF前端的建立时间很短， 射频切换速度高。 滤波输出以多GHz采样率进行数字化处理，所有信号处理由FPGA或FPGA和/或通用处理器的组合完成。