RFID SYSTEM COMPONENTS IMPLEMENTING ADJUSTED BACKSCATTER CALCULATIONS AND METHODS
    4.
    发明申请
    RFID SYSTEM COMPONENTS IMPLEMENTING ADJUSTED BACKSCATTER CALCULATIONS AND METHODS 有权
    RFID系统组件实施调整后的计算机和方法

    公开(公告)号:US20080006702A2

    公开(公告)日:2008-01-10

    申请号:US11114614

    申请日:2005-04-25

    IPC分类号: G06K19/06

    摘要: RFID system components, such as readers and tags, communicate by a reader transmitting waveforms that encode a calibration symbol and a divide ratio. Tags include a processor to determine a backscatter link period result by dividing a count value representing the calibration symbol by the divide ratio and adding an adjustment. Tags modulate a backscatter waveform that includes symbols using a link period determined from the result.

    摘要翻译: 诸如读取器和标签的RFID系统组件由读取器传送,该读取器发送编码校准符号和分频比的波形。 标签包括通过将表示校准符号的计数值除以除法比率并且添加调整来确定反向散射链路周期结果的处理器。 标签使用从结果确定的链路周期调制包括符号的反向散射波形。

    Adaptable bandwidth RFID tags
    5.
    发明申请
    Adaptable bandwidth RFID tags 有权
    适应带宽RFID标签

    公开(公告)号:US20050225435A1

    公开(公告)日:2005-10-13

    申请号:US10823991

    申请日:2004-04-13

    IPC分类号: G06K19/07 H04Q5/22

    CPC分类号: G06K19/0723

    摘要: RFID tags, tag circuits, and methods adapting the reception bandwidth. A tag has a decoder for decoding a first received wireless signal subject to a reception bandwidth setting. The tag also has a selector switch for transitioning to a different setting, such as by switching to using a different filter. A subsequently received second signal is decoded subject to the new reception bandwidth setting.

    摘要翻译: RFID标签,标签电路和适应接收带宽的方法。 标签具有解码器,用于对接收带宽设置的第一接收无线信号进行解码。 标签还具有用于转换到不同设置的选择器开关,例如通过切换到使用不同的滤镜。 经过新的接收带宽设置,随后接收的第二信号被解码。

    RFID READER SYSTEMS DETECTING PILOT TONE
    8.
    发明申请
    RFID READER SYSTEMS DETECTING PILOT TONE 审中-公开
    RFID读写器系统检测引导音

    公开(公告)号:US20070109129A1

    公开(公告)日:2007-05-17

    申请号:US11622092

    申请日:2007-01-11

    IPC分类号: G08B13/14

    CPC分类号: G06K7/0008

    摘要: RFID tags are commanded to generate a pilot tone in their backscatter. When the backscattered pilot tone is received in the reader, the pilot tone is used to estimate the tag period/frequency. Then, the estimate is used to seed and lock a symbol timing recovery loop, which provides a detected signal to one or more correlators for detecting the tag preamble. A delayed version of the received tag signal is compared against a baseline signal threshold established from the received signal to detect the pilot tone.

    摘要翻译: 命令RFID标签在其反向散射中产生导频音。 当在读取器中接收到反向散射导频时,使用导频音来估计标签周期/频率。 然后,估计用于对符号定时恢复循环进行种子和锁定,该循环向一个或多个相关器提供检测信号以检测标签前导码。 将接收到的标签信号的延迟版本与从接收信号建立的基线信号阈值进行比较,以检测导频音。

    Reconstructing RFID waveform shape for reuse in individual channel
    9.
    发明申请
    Reconstructing RFID waveform shape for reuse in individual channel 有权
    重构RFID波形形状,在单个通道中重复使用

    公开(公告)号:US20060261954A1

    公开(公告)日:2006-11-23

    申请号:US11412171

    申请日:2006-04-25

    IPC分类号: G08B13/14

    CPC分类号: G06K7/0008 G06K19/0723

    摘要: Systems, software, devices, and methods are described for an RFID reader system to communicate with RFID tags. RF energy detected in conjunction with using a selected channel is detected and used to adjust a waveform shaping parameter. The waveform shaping parameter can be additionally stored, and then reconstructed for later use in the same channel. Reconstruction can optionally be also from derived channel performance data. RF waves can be transmitted from the reader to the RFID tags and RF waves can be backscattered from the RFID tags. At least some of the RF waves transmitted to or backscattered from the RFID tags have a waveform with a shape according to the reconstructed waveform shaping parameter.

    摘要翻译: 描述了RFID读取器系统与RFID标签通信的系统,软件,设备和方法。 检测结合使用所选通道的RF能量并用于调整波形整形参数。 可以另外存储波形整形参数,然后重建以供以后在同一通道中使用。 重构也可以是衍生通道性能数据。 RF波可以从读取器发送到RFID标签,并且RF波可以从RFID标签反向散射。 从RFID标签发送到或反向散射的至少一些RF波具有根据重建的波形整形参数的具有形状的波形。

    RFID reader to select code modules
    10.
    发明申请
    RFID reader to select code modules 有权
    RFID阅读器选择代码模块

    公开(公告)号:US20060145855A1

    公开(公告)日:2006-07-06

    申请号:US11316790

    申请日:2005-12-22

    IPC分类号: G08B13/14 H04Q5/22 G06K7/00

    CPC分类号: G06K7/0008 G06K19/0723

    摘要: An RFID reader comprising an antenna, a memory adapted to store a plurality of code modules, a selector for selecting one of the code modules, and a modulator adapted to operate the antenna in accordance with the selected code module.

    摘要翻译: 一种RFID读取器,包括天线,适于存储多个代码模块的存储器,用于选择代码模块之一的选择器,以及适于根据所选代码模块操作天线的调制器。