Radio frequency identification fast tag response method and system
    2.
    发明申请
    Radio frequency identification fast tag response method and system 审中-公开
    射频识别快速标签响应方法和系统

    公开(公告)号:US20080079557A1

    公开(公告)日:2008-04-03

    申请号:US11786397

    申请日:2007-04-11

    IPC分类号: G08B29/00

    CPC分类号: H04B5/02 H04B5/0062

    摘要: A method and system for processing radio frequency identification (“RFID”) communication device data, the method and system including measuring an energy level of a RFID signal received on a first communication channel, measuring an energy level of the RFID signal received on a second communication channel, selecting the communication channel with the greater energy level, and acquiring data samples from the RFID signal received on the selected channel. The method and system for processing RFID communication device data can further include generating a preamble from a series of the acquired data samples.

    摘要翻译: 一种用于处理射频识别(“RFID”)通信设备数据的方法和系统,所述方法和系统包括测量在第一通信信道上接收的RFID信号的能级,测量在第二通信信道上接收的RFID信号的能级 通信信道,选择具有较高能量级别的通信信道,以及从所选择的信道上接收到的RFID信号获取数据样本。 用于处理RFID通信设备数据的方法和系统还可以包括从一系列获取的数据样本中产生前导码。

    EAS system antenna configuration for providing improved interrogation
field distribution
    3.
    发明授权
    EAS system antenna configuration for providing improved interrogation field distribution 失效
    EAS系统天线配置,用于提供改进的询问场分布

    公开(公告)号:US6020856A

    公开(公告)日:2000-02-01

    申请号:US909036

    申请日:1997-08-11

    申请人: Jorge Alicot

    发明人: Jorge Alicot

    摘要: In an electronic article surveillance system, quadrature transmitting and receiving antennas are used to improve field distribution. A transmitting antenna arrangement includes first and second adjacent co-planar antenna loops and excitation circuitry for generating respective alternating currents in the first and second loops such that the respective alternating currents are 90.degree. out of phase. In a receiving arrangement, respective signals received from two adjacent co-planar antenna loops are respectively phase-shifted by +45.degree. and -45.degree., and the resulting phase-shifted signals are summed. A far-field cancelling transmitting antenna arrangement includes four loops operated at phases of 0.degree., 90.degree., 180.degree. and 270.degree. respectively. All four loops may be co-planar, with any bucking vertical segments being horizontally displaced from each other. Alternatively, the 0.degree. and 180.degree. loops may also be arranged in a common plane that is close to and parallel with another plane in which the 90.degree. and 270.degree. loops are arranged.

    摘要翻译: 在电子物品监控系统中,使用正交发射和接收天线来改善场分布。 发射天线装置包括第一和第二相邻的共面天线环路和激励电路,用于在第一和第二环路中产生相应的交流电,使得相应的交流电流相位相差90°。 在接收装置中,从两个相邻的共面天线回路接收的相应信号分别相移+45°和-45°,并将所得的相移信号相加。 远场消除发射天线装置包括分别在0°,90°,180°和270°的相位操作的四个回路。 所有四个环可以是共面的,任何弯曲的垂直段彼此水平位移。 或者,0°和180°环也可以布置在与布置90°和270°环的另一平面接近并平行的公共平面中。

    Channel selection method for improved wireless communication
    4.
    发明申请
    Channel selection method for improved wireless communication 审中-公开
    用于改进无线通信的信道选择方法

    公开(公告)号:US20090040971A1

    公开(公告)日:2009-02-12

    申请号:US11918770

    申请日:2006-02-17

    IPC分类号: H04W74/00

    CPC分类号: H04W16/14

    摘要: A communication system (10) receiving a communication signal from a far communication system (12) has a channel selector, and a number of local transceivers (22) forming a first broadcast array and a second channel searching array. The first broadcast array is configured to receive the communication signal and transmit a local communication signal on channels. Each local transceiver is connected to a controller (32). The controller is configured to remove noise from the far communication signal. The noise includes interference from the local transceivers being received on the channel. The controller measures a parameter of at Least one of the channels. The controller determines an availability of one or some channels using the second channel searching array. The second channel searching array outputs an available channel signal to the controller. The controller (32) communicates the availability to at least one of the first broadcast array to transmit and to receive the far communication signal on the available channel.

    摘要翻译: 从远程通信系统(12)接收通信信号的通信系统(10)具有信道选择器和形成第一广播阵列和第二信道搜索阵列的多个本地收发器(22)。 第一广播阵列被配置为接收通信信号并且在信道上发送本地通信信号。 每个本地收发器连接到控制器(32)。 控制器被配置为从远端通信信号中去除噪声。 噪声包括在信道上接收的本地收发器的干扰。 控制器测量至少一个通道的参数。 控制器使用第二信道搜索阵列确定一个或一些信道的可用性。 第二通道搜索阵列向控制器输出可用的通道信号。 控制器(32)将可用性传达到第一广播阵列中的至少一个,以在可用信道上发送并接收远端通信信号。

    RFID reader with integrated display for use in a product tag system
    6.
    发明授权
    RFID reader with integrated display for use in a product tag system 有权
    集成显示器的RFID读写器,用于产品标签系统

    公开(公告)号:US06429776B1

    公开(公告)日:2002-08-06

    申请号:US09778415

    申请日:2001-02-07

    IPC分类号: G08B1314

    摘要: A product tag system comprises: an RFID tag adapted for attachment to a product; a data store in the tag for bar code information relating to the product; a tag detacher for removing the tag from the product at a point of sale; an RFID tag reader for retrieving the bar code information from the tag when the tag is placed in the tag detacher; and, an display for presenting the bar code information in a form which can be scanned by a conventional bar code scanner, and/or in human readable form. A method for monitoring products comprise the steps of: attaching an RFID tag to a product; writing bar code information onto the tag; retrieving the bar code information from the tag at a point of sale; displaying the bar code information in a form which can be scanned by a conventional bar code scanner, and/or in human readable form; and, detaching the tag from the product.

    摘要翻译: 产品标签系统包括:适于附接到产品的RFID标签; 标签中的数据存储器,用于与产品相关的条形码信息; 标签分离器,用于在销售点从产品中移除标签; RFID标签读取器,用于当标签放置在标签分离器中时从标签中检索条形码信息; 以及用于以可由常规条形码扫描仪扫描的形式和/或以人类可读形式呈现条形码信息的显示器。 一种用于监视产品的方法包括以下步骤:将RFID标签附接到产品; 将条形码信息写入标签; 在销售点从标签检索条形码信息; 以可以由常规条形码扫描仪扫描的形式和/或以人类可读形式显示条形码信息; 并从产品中分离标签。

    EAS system antenna configuration for providing improved interrogation
field distribution

    公开(公告)号:US6081238A

    公开(公告)日:2000-06-27

    申请号:US887821

    申请日:1997-07-03

    申请人: Jorge Alicot

    发明人: Jorge Alicot

    摘要: In an electronic article surveillance system, quadrature transmitting and receiving antennas are used to improve field distribution. A transmitting antenna arrangement includes first and second adjacent co-planar antenna loops and excitation circuitry for generating respective alternating currents in the first and second loops such that the respective alternating currents are 90.degree. out of phase. In a receiving arrangement, respective signals received from two adjacent co-planar antenna loops are respectively phase-shifted by +45.degree. and -45.degree., and the resulting phase-shifted signals are summed. A far-field cancelling transmitting antenna arrangement includes four loops operated at phases of 0.degree., 90.degree., 180.degree. and 270.degree. respectively. All four loops may be co-planar, with any bucking vertical segments being horizontally displaced from each other. Alternatively, the 0.degree. and 180.degree. loops may also be arranged in a common plane that is close to and parallel with another plane in which the 90.degree. and 270.degree. loops are arranged.