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    Radio frequency identification interrogation systems and methods of operating the same
    2.
    发明申请
    Radio frequency identification interrogation systems and methods of operating the same 审中-公开
    射频识别询问系统及其操作方法

    公开(公告)号：US20060017545A1

    公开(公告)日：2006-01-26

    申请号：US11090334

    申请日：2005-03-25

    申请人： John Volpi ,  Steven Roemerman ,  Joseph Tepera ,  Logan Scott

    发明人： John Volpi ,  Steven Roemerman ,  Joseph Tepera ,  Logan Scott

    IPC分类号： H04Q5/22

    CPC分类号： G06K19/0723 ,  G01S13/751 ,  G01S13/767 ,  G01S13/825 ,  G06K19/0739

    摘要： A reply code for a radio frequency identification (RFID) tag, a method of improving a reply code for a radio frequency identification (RFID) tag for interrogation by an interrogator and an RFID tag employing the same. In one embodiment, the reply code includes a preamble having information about a quality of a clock associated with the RFID tag. The reply code also includes a tag identification (ID) code providing a digital signature for the RFID tag. The reply code still further includes an aftamble located aft of the preamble and having information about the quality of the clock. The aftamble cooperates with the preamble to improve a quality of the reply code for interrogation by an interrogator.

    摘要翻译： 用于射频识别（RFID）标签的答复码，改进用于询问器询问的用于射频识别（RFID）标签的应答码的方法以及采用该标签的RFID标签。 在一个实施例中，回复代码包括具有关于与RFID标签相关联的时钟的质量的信息的前同步码。 回复代码还包括为RFID标签提供数字签名的标签标识（ID）代码。 回复码还包括位于前导码后方的后遗迹，并且具有关于时钟质量的信息。 后验协议与前导码相结合，以提高询问器询问的回复码的质量。

    Interrogator and Interrogation System Employing the Same
    3.
    发明申请
    Interrogator and Interrogation System Employing the Same 有权
    读写器和询问系统使用它

    公开(公告)号：US20080018432A1

    公开(公告)日：2008-01-24

    申请号：US11838091

    申请日：2007-08-13

    申请人： John Volpi ,  Logan Scott ,  Wallace Kluck ,  David Hensley

    发明人： John Volpi ,  Logan Scott ,  Wallace Kluck ,  David Hensley

    IPC分类号： H04Q5/22

    CPC分类号： G01S13/66 ,  A61B90/98 ,  A61B2090/0805 ,  G01S13/825 ,  G01S13/878 ,  G06K7/0008 ,  G06K17/00 ,  G06K2017/0045 ,  G06Q10/08 ,  G06Q10/087

    摘要： An interrogator, methods of discerning the presence of an object, and interrogation systems employing the same. In one embodiment, the interrogation systems include multiple interrogators that communicate with a base command unit to track a location of an object. In another embodiment wherein the object is an RFID object (e.g., an object with an RFID tag), the interrogators employ signal processing techniques such as precharging the RFID object, and correlating a reference code with a reply code from the RIFD object using selected techniques to increase a sensitivity of the interrogator, especially for adverse environments. In other embodiments, the interrogation systems include variations of metal instruments and sponges employed therewith. In yet another embodiment, the interrogation system includes metal interrogators capable of discerning the presence of a metal object, especially in a presence of another metal object.

    摘要翻译： 询问器，辨别对象的存在的方法以及采用该对象的询问系统。 在一个实施例中，询问系统包括与基本命令单元通信以跟踪对象的位置的多个询问器。 在其中物体是RFID物体（例如，具有RFID标签的物体）的另一实施例中，询问器采用诸如预先对RFID物体进行预充电的信号处理技术，并且使用所选技术将参考码与来自RIFD物体的回复码相关联 增加询问器的灵敏度，特别是对于恶劣环境。 在其他实施例中，询问系统包括与其一起使用的金属器具和海绵的变型。 在另一个实施例中，询问系统包括能够识别金属物体的存在的金属询问器，特别是在存在另一金属物体的情况下。

    Interrogator and Interrogation System Employing the Same
    4.
    发明申请
    Interrogator and Interrogation System Employing the Same 有权

    公开(公告)号：US20080018469A1

    公开(公告)日：2008-01-24

    申请号：US11838094

    申请日：2007-08-13

    申请人： John Volpi ,  Logan Scott ,  David Hensley

    发明人： John Volpi ,  Logan Scott ,  David Hensley

    IPC分类号： G08B13/14

    CPC分类号： G01S13/66 ,  A61B90/98 ,  A61B2090/0805 ,  G01S7/40 ,  G01S13/825 ,  G01S13/878 ,  G06K7/0008 ,  G06K17/00 ,  G06K2017/0045 ,  G06Q10/08 ,  G06Q10/087

    摘要： An interrogator, methods of discerning the presence of an object, and interrogation systems employing the same. In one embodiment, the interrogation systems include multiple interrogators that communicate with a base command unit to track a location of an object. In another embodiment wherein the object is an RFID object (e.g., an object with an RFID tag), the interrogators employ signal processing techniques such as precharging the RFID object, and correlating a reference code with a reply code from the RIFD object using selected techniques to increase a sensitivity of the interrogator, especially for adverse environments. In other embodiments, the interrogation systems include variations of metal instruments and sponges employed therewith. In yet another embodiment, the interrogation system includes metal interrogators capable of discerning the presence of a metal object, especially in a presence of another metal object.

    Interrogator and interrogation system employing the same
    6.
    发明申请
    Interrogator and interrogation system employing the same 有权
    采用相同的询问器和询问系统

    公开(公告)号：US20050201450A1

    公开(公告)日：2005-09-15

    申请号：US11071652

    申请日：2005-03-03

    申请人： John Volpi ,  Logan Scott ,  Eric McMurry

    发明人： John Volpi ,  Logan Scott ,  Eric McMurry

    IPC分类号： G06K7/00 ,  G06K17/00 ,  H04B1/69

    CPC分类号： G06K7/10366 ,  G06K7/0008 ,  G06K2017/0051 ,  G06K2017/009

    摘要： A control and processing system for use with an interrogator and an interrogation system employing the same. In one embodiment, the control and processing system includes a correlation subsystem having a correlator that correlates a reference code with a reply code from a radio frequency identification (RFID) tag and provides a correlation signal therefrom. The control and processing system also includes a decision subsystem that verifies a presence of the RFID tag as a function of the correlation signal.

    摘要翻译： 一种与询问器一起使用的控制和处理系统以及采用该询问系统的询问系统。 在一个实施例中，控制和处理系统包括具有相关器的相关子系统，该相关器将参考码与来自射频识别（RFID）标签的回复码相关联并从其提供相关信号。 控制和处理系统还包括判定子系统，其根据相关信号来验证RFID标签的存在。

    Interrogator and interrogation system employing the same
    7.
    发明授权
    Interrogator and interrogation system employing the same 有权
    采用相同的询问器和询问系统

    公开(公告)号：US08948279B2

    公开(公告)日：2015-02-03

    申请号：US11071652

    申请日：2005-03-03

    申请人： John P. Volpi ,  Logan Scott ,  Eric McMurry

    发明人： John P. Volpi ,  Logan Scott ,  Eric McMurry

    IPC分类号： H04B1/64 ,  G06K7/00 ,  G06K17/00

    CPC分类号： G06K7/10366 ,  G06K7/0008 ,  G06K2017/0051 ,  G06K2017/009

    摘要： A control and processing system for use with an interrogator and an interrogation system employing the same. In one embodiment, the control and processing system includes a correlation subsystem having a correlator that correlates a reference code with a reply code from a radio frequency identification (RFID) tag and provides a correlation signal therefrom. The control and processing system also includes a decision subsystem that verifies a presence of the RFID tag as a function of the correlation signal.

    摘要翻译： 一种与询问器一起使用的控制和处理系统以及采用该询问系统的询问系统。 在一个实施例中，控制和处理系统包括具有相关器的相关子系统，该相关器将参考码与来自射频识别（RFID）标签的回复码相关联并从其提供相关信号。 控制和处理系统还包括判定子系统，其根据相关信号来验证RFID标签的存在。

    Preamble code structure and detection method and apparatus
    9.
    发明授权
    Preamble code structure and detection method and apparatus 失效
    前导码结构及检测方法及装置

    公开(公告)号：US06356607B1

    公开(公告)日：2002-03-12

    申请号：US08749885

    申请日：1996-11-15

    申请人： Logan Scott ,  Robert Monroe

    发明人： Logan Scott ,  Robert Monroe

    IPC分类号： H04L700

    CPC分类号： H04B7/2681 ,  H04B1/7093 ,  H04J13/0022 ,  H04J13/107 ,  H04J2013/0037 ,  H04W28/06 ,  H04W56/0045 ,  H04W74/0891 ,  H04W88/02 ,  H04W88/08

    摘要： In a first embodiment of the invention, a concatenated preamble code is formed by a kronecker product between two subcodes of the same or different lengths. The subcodes have favorable correlation properties and may be Barker codes, minimum peak sidelobe codes, Gold codes, Kasami codes, Bozta codes, or other codes. At the receiver a two-stage processor is used to detect the concatenated preamble code. The two-stage processor comprises a series of two filters, one of which is preferably a mismatched filter. In another aspect of the invention, a repeated codeword preamble is formed from a series of the same repeated short subcode. The short subcode may be an augmented or truncated odd-length code. At the receiver a single matched filter is preferably used to generate a series of spikes separated by the period of the subcode. An alert/confirm detector non-coherently adds together individual correlation spikes and reject false alarms. The alert function measures total correlation energy and adjusts detection thresholds based thereon, while the confirm function ensures that the proper number of correlation spikes exceed a detection threshold at the correct times. The preamble codes and their means for detection are preferably employed in a TDMA spread spectrum communication system, wherein a plurality of user stations communicate with a base station, one in each time slot (or virtual time slot).

    摘要翻译： 在本发明的第一实施例中，连续的前导码由相同或不同长度的两个子码之间的克罗内斯乘积形成。 子代码具有良好的相关性质，可以是巴克码，最小峰值旁瓣码，金码，卡萨米码，波兹塔码 ，或其他代码。 在接收机处，使用两级处理器来检测级联的前导码。 两级处理器包括一系列两个过滤器，其中一个过滤器最好是错配过滤器。 在本发明的另一方面，重复的码字前导由一系列相同的重复的短子码形成。 短子码可以是扩充或截断的奇数码。 在接收机处，优选地使用单个匹配滤波器来产生由子码的周期分隔的一系列尖峰。 警报/确认检测器不相干地将各个相关尖峰相加并拒绝假警报。 警报功能测量总相关能量并根据此调整检测阈值，而确认功能确保适当数量的相关尖峰在正确的时间超过检测阈值。 前导码及其用于检测的装置优选地用于TDMA扩频通信系统中，其中多个用户站与基站通信，每个时隙（或虚拟时隙）中的一个。

    Timing adjustment control for efficient time division duplex communication
    10.
    发明授权
    Timing adjustment control for efficient time division duplex communication 失效
    定时调整控制，用于高效的时分双工通信

    公开(公告)号：US5959980A

    公开(公告)日：1999-09-28

    申请号：US464285

    申请日：1995-06-05

    申请人： Logan Scott

    发明人： Logan Scott

    IPC分类号： H04B7/26 ,  H04J3/06 ,  H04J13/00 ,  H04W24/00 ,  H04W28/06 ,  H04W48/08 ,  H04W72/02 ,  H04W72/12 ,  H04W74/06 ,  H04W76/02 ,  H04W88/08 ,  H04B1/56

    CPC分类号： H04J13/00 ,  H04B7/2656 ,  H04J3/0682 ,  H04W56/0005 ,  H04W56/0045 ,  H04W56/009 ,  H04W24/00 ,  H04W28/06 ,  H04W48/08 ,  H04W74/06 ,  H04W76/02 ,  H04W88/08

    摘要： A system and method for time division duplex communication over a single frequency band wherein guard time overhead is reduced by active adjustment of reverse link transmission timing as a function of round trip propagation time. A time frame is divided into a plurality of time slots, during each of which the base station transmits to a user station and the user station transmits to the base station. Communication is initiated by a round trip timing transaction. In response to a general polling message from the base station, a user station seeking to establish communication transmits a short reply message. The base station calculates the distance of the user station by measuring the propagation delay with respect to receipt of the reply message. The base station sends a timing adjustment command to the user station instructing the user station to advance or retard its timing according to the calculated distance, so as to minimize guard times between time slots. Thereafter, the base station monitors the user station transmissions and periodically commands the user station to advance or retard its timing in a like manner. The user station may transmit a control preamble at the start of each time slot to allow the base station to perform round trip timing calculations, and/or to allow adjustment of user station power or antenna selection.

    摘要翻译： 一种用于在单个频带上进行时分双工通信的系统和方法，其中通过作为往返传播时间的函数的反向链路传输定时的主动调整来减小保护时间开销。 时间帧被分成多个时隙，在每个时隙中，基站向用户站发送，并且用户站向基站发送。 通信由一个往返定时事务发起。 响应于来自基站的一般轮询消息，寻求建立通信的用户站发送短的应答消息。 基站通过测量相对于接收回复消息的传播延迟来计算用户站的距离。 基站向用户站发送定时调整命令，指示用户站根据计算出的距离推进或延迟其定时，以最小化时隙之间的保护时间。 此后，基站监视用户站传输，并周期性地命令用户站以类似的方式提前或延迟其定时。 用户站可以在每个时隙开始时发送控制前同步码，以允许基站执行往返定时计算，和/或允许调整用户站功率或天线选择。