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11. 发明授权

US08773243B1 Battery assisted RFID tag receiver training and synchronization methods 有权
标题翻译：电池辅助RFID标签接收机的训练和同步方法
公开(公告)号：US08773243B1
公开(公告)日：2014-07-08
申请号：US12205846
申请日：2008-09-05
申请人： Johannes Albertus van Niekerk , Farron Dacus , Alfonso Rodriguez
发明人： Johannes Albertus van Niekerk , Farron Dacus , Alfonso Rodriguez
IPC分类号： H04Q5/22
CPC分类号： G06K7/0008 , G06K7/10019 , G06K19/0723 , H04Q2213/13095
摘要： Embodiments of the present invention provide for enhanced RFID tag receiver training and synchronizing methods suited to the high tag sensitivity that results from use of transistor detector based square law tag receivers and tag hibernation to maximize battery life. These enhancements may employ pseudo-random sequence based receiver training, activation signaling, and frame synchronizing. Embodiments of the present invention also provide RFID systems having battery-assisted, Semi-Passive RFID tags that operate with sensitive tag receivers utilizing a plurality of tag receiver dynamic range states. Further enhancement is achieved via design of system command sets and tag state machine behavior that control system interference and allow maximum usage of high sensitivity. Command set design also allows for convenient expansion to active transmitters and receivers in tags operating within the same system. Additional system performance support is attained via power leveling methods that optimize the amount of transmitted power and interference from a reader in relation to the sensitivity of the RFID tags, their ranges from the reader, and the unique physics of the backscatter RFID radio link.
摘要翻译：本发明的实施例提供了适用于使用基于晶体管检测器的平方律标签接收器和标签休眠产生的高标签灵敏度的增强的RFID标签接收器训练和同步方法，以最大限度地延长电池寿命。这些增强可以采用基于伪随机序列的接收机训练，激活信令和帧同步。本发明的实施例还提供具有电池辅助的半无源RFID标签的RFID系统，其利用多个标签接收器动态范围状态的灵敏标签接收器进行操作。通过设计系统命令集和标签状态机行为来实现进一步的增强，可以控制系统的干扰并允许最大限度地使用高灵敏度。命令集设计还允许在同一系统内操作的标签中方便地扩展到主动发射机和接收机。通过功率调节方法获得额外的系统性能支持，该方法可以优化发送功率和来自读取器的干扰量，这与RFID标签的敏感度，读取器的范围以及反向散射RFID无线电链路的独特物理有关。

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