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13 条记录 (耗时 0.026 秒)

    Expanded compatibility RFID tags
    1.
    发明授权
    Expanded compatibility RFID tags 有权
    扩展兼容性RFID标签

    公开(公告)号：US07755486B2

    公开(公告)日：2010-07-13

    申请号：US11535482

    申请日：2006-09-26

    申请人： Liping Julia Zhu ,  Allan Michael Evans ,  Steven J. Farrell ,  Don Ahn

    发明人： Liping Julia Zhu ,  Allan Michael Evans ,  Steven J. Farrell ,  Don Ahn

    IPC分类号： G08B9/00 ,  G08B1/08 ,  G08B13/14 ,  H04Q5/22

    CPC分类号： G06K17/0029 ,  G06Q10/08 ,  G06Q10/087 ,  G06Q50/28 ,  G08B13/2462 ,  G08B25/10 ,  H04W24/00 ,  H04W64/00

    摘要： Systems and methods for providing expanded compatibility in identification tags such as RFID (Radio Frequency Identification) devices. Integrated devices can be equipped with various combinations of passive and active tags configured for compatibility with passive and active readers, respectively. Additionally, the integrated devices can be equipped with various combinations of passive and active tag readers for compatibility with passive and active tags, respectively. A first combination comprises an active tag and a passive tag reader for collecting information over a passive channel, and sending the information over an active channel. A second combination comprises an active tag and a passive tag receiver/transceiver for communication over both active and passive channels. A third combination comprises an active tag and an active tag reader for collecting information over an active channel, and sending information over an active channel.

    摘要翻译： 在诸如RFID（射频识别）设备的识别标签中提供扩展的兼容性的系统和方法。 集成器件可以分别配备与被动和主动读取器兼容的被动和主动标签的各种组合。 此外，集成器件可以分别配备有被动和有源标签读取器的各种组合，以便与被动和有源标签兼容。 第一组合包括有源标签和用于在无源信道上收集信息的无源标签读取器，以及通过活动信道发送信息。 第二组合包括有源标签和用于通过主动和被动通道进行通信的无源标签接收器/收发器。 第三组合包括有源标签和用于通过有效信道收集信息的有源标签读取器，以及通过活动信道发送信息。

    Method and apparatus for control or monitoring of a container
    2.
    发明授权
    Method and apparatus for control or monitoring of a container 有权
    用于控制或监控容器的方法和装置

    公开(公告)号：US08258950B2

    公开(公告)日：2012-09-04

    申请号：US11183054

    申请日：2005-07-15

    申请人： Ravindra U. Rajapakse ,  Roderick E. Thorne ,  Robert Fraser Jennings ,  Steven J. Farrell ,  Liping Julia Zhu

    发明人： Ravindra U. Rajapakse ,  Roderick E. Thorne ,  Robert Fraser Jennings ,  Steven J. Farrell ,  Liping Julia Zhu

    IPC分类号： G08B13/14

    CPC分类号： G06Q10/00

    摘要： An apparatus includes a carrier, and a system that is responsive to wireless signals transmitted by tags on items carried by the carrier for maintaining a local inventory of items carried by the carrier. A different apparatus involves a carrier having a container with an interior, a sensor for detecting a condition externally of the container that can be related to an environment within the container, and a system that handles information from the sensor in a manner facilitating an evaluation of the likelihood that a problem exists within the container. Another apparatus involves a carrier for a plurality of items, and a system that is responsive to wireless signals received from a remote location for determining a current location of the carrier and for evaluating whether the carrier is proceeding along an intended route.

    摘要翻译： 一种装置包括载体和响应于由载体承载的物品上的标签发送的无线信号的系统，用于维护载体携带的物品的本地库存。 不同的装置包括具有内部容器的载体，用于检测容器外部可能与容器内的环境相关的状况的传感器，以及以便于评价的方式处理来自传感器的信息的系统 容器内存在问题的可能性。 另一装置涉及用于多个物品的载体，以及响应于从远程位置接收的无线信号来确定载波的当前位置并用于评估载体是否沿预定路线进行的系统。

    Differential minimum mean squared error communication signal compensation method
    9.
    发明授权
    Differential minimum mean squared error communication signal compensation method 失效
    差分最小均方误差通信信号补偿方法

    公开(公告)号：US06426973B1

    公开(公告)日：2002-07-30

    申请号：US09301912

    申请日：1999-04-29

    申请人： Upamanyu Madhow ,  Liping Julia Zhu ,  Luis Galup

    发明人： Upamanyu Madhow ,  Liping Julia Zhu ,  Luis Galup

    IPC分类号： H03H730

    CPC分类号： H04B1/71055 ,  H04B1/7115 ,  H04B7/0854 ,  H04L2025/03605

    摘要： This invention reformulates the MMSE criterion to apply to systems in which the desired data to be tracked is the ratio of the data appearing in successive observation intervals. The resulting differential MMSE criterion leads to a number of novel algorithms for adaptive implementation of the MMSE receiver. Applications include equalization for single user systems, and multiuser detection, or interference suppression, for direct sequence CDMA with short spreading sequences (i.e., the period of the spreading sequence equals the symbol interval). The invention also provides blind (i.e., without the requirement of a training symbol sequence for the user of interest) equalization and beamforming (using a receive antenna array) for direct sequence CDMA systems with long spreading sequences (i.e., systems in which the spreading sequences are aperiodic, or have period much larger than the symbol interval). The invention enables recovery of the desired symbol sequence up to an unknown phase. The invention is therefore well suited to the demodulation of differentially modulated data, in which information is encoded in the phase differences of successive transmitted symbols. Assuming that the channel amplitude and phase is approximately constant over two successive symbol intervals, the demodulator can use the differences in phases of two successive received symbols to recover differentially encoded data. The invention may also be used in conjunction with a separate phase recovery method to demodulate data without differential modulation.

    摘要翻译： 本发明重新制定了MMSE准则，以适用于要跟踪的期望数据是在连续观察间隔中出现的数据的比率的系统。 得到的差分MMSE标准导致许多用于MMSE接收机的自适应实现的新颖算法。 应用包括用于单用户系统的均衡，以及用于具有短扩展序列的直接序列CDMA（即，扩展序列的周期等于符号间隔）的多用户检测或干扰抑制。 本发明还提供对于具有长扩展序列的直接序列CDMA系统（即，其中扩展序列的系统），盲目（即，不需要感兴趣的用户的训练符号序列）均衡和波束成形（使用接收天线阵列） 是非周期性的，或具有比符号间隔大得多的周期）。 本发明使得可以将期望的符号序列恢复到未知相位。 因此，本发明非常适合于差分调制数据的解调，其中信息被编码在连续传输符号的相位差中。 假设信道幅度和相位在两个连续符号间隔上近似恒定，则解调器可以使用两个连续接收符号的相位差来恢复差分编码数据。 本发明还可以与单独的相位恢复方法一起使用以在不进行差分调制的情况下解调数据。