RFID READER AND METHOD FOR SUPPRESSING TRANSMISSION LEAKAGE SIGNAL THEREOF
    1.
    发明申请
    RFID READER AND METHOD FOR SUPPRESSING TRANSMISSION LEAKAGE SIGNAL THEREOF 失效
    用于抑制传输泄漏信号的RFID读取器和方法

    公开(公告)号:US20110136445A1

    公开(公告)日:2011-06-09

    申请号:US12786777

    申请日:2010-05-25

    IPC分类号: H04B1/40

    摘要: Provided are an RFID reader and a method for suppressing transmission leakage signals thereof. The RFID reader includes a first loop, a second loop, and a digital signal processor. The first loop suppresses a first transmission leakage signal of an RX signal in response to a first leakage control signal. The second loop suppresses a second transmission leakage signal of the RX signal, received through the first loop, in response to a second leakage control signal. The digital signal processor generates the first leakage control signal and the second leakage control signal. The digital signal processor generates the first leakage control signal until the level of the first transmission leakage signal becomes equal to or lower than the level of a first reference transmission leakage signal.

    摘要翻译: 提供RFID读取器和用于抑制其传输泄漏信号的方法。 RFID读取器包括第一环路,第二环路和数字信号处理器。 第一回路响应于第一泄漏控制信号来抑制RX信号的第一传输泄漏信号。 响应于第二泄漏控制信号,第二回路抑制通过第一回路接收的RX信号的第二传输泄漏信号。 数字信号处理器产生第一泄漏控制信号和第二泄漏控制信号。 数字信号处理器产生第一泄漏控制信号,直到第一传输泄漏信号的电平变得等于或低于第一参考传输泄漏信号的电平。

    PASSIVE RFID READER AND OPERATION CONTROL METHOD THEREFOR
    3.
    发明申请
    PASSIVE RFID READER AND OPERATION CONTROL METHOD THEREFOR 失效
    被动RFID阅读器及其操作控制方法

    公开(公告)号:US20080122581A1

    公开(公告)日:2008-05-29

    申请号:US11746306

    申请日:2007-05-09

    IPC分类号: H04Q5/22

    摘要: Provided is a Radio Frequency Identification (RFID) reader that can minimize collision among RFID readers in an environment where there are a plurality of RFID readers within a limited operating environment by making each RFID reader select a channel at different delay time based on a random value, and a method for controlling operation of the RFID reader. The RFID reader includes a random value generating unit; a reader control unit for adaptively deciding a counter value for generating the random value; an anti-collision unit for preventing collision among a plurality of tags; a reader transmitting unit for generating a reader command message determined by the anti-collision unit, encoding the reader command message, and modulating the reader command message; a reader receiving unit for demodulating and decoding a tag signal; and a channel operation control unit for selecting a channel to be used for the communication with the tag.

    摘要翻译: 提供了一种射频识别(RFID)读取器,其可以在有限操作环境中存在多个RFID读取器的环境中最小化RFID读取器之间的冲突,使得每个RFID读取器基于随机值在不同的延迟时间选择信道 以及用于控制RFID读取器的操作的方法。 RFID读取器包括随机值生成单元; 读取器控制单元,用于自适应地确定用于生成随机值的计数器值; 用于防止多个标签之间的碰撞的防碰撞单元; 读取器发送单元,用于生成由反冲突单元确定的读取器命令消息,对读取器命令消息进行编码,以及调制读取器命令消息; 读取器接收单元,用于解调和解码标签信号; 以及频道操作控制单元,用于选择要用于与标签进行通信的频道。

    METHOD AND DEVICE FOR SETTING RFID PARAMETER
    4.
    发明申请
    METHOD AND DEVICE FOR SETTING RFID PARAMETER 审中-公开
    用于设置RFID参数的方法和设备

    公开(公告)号:US20090146787A1

    公开(公告)日:2009-06-11

    申请号:US12203426

    申请日:2008-09-03

    IPC分类号: H04Q5/22

    摘要: The present invention relates to an RFID parameter setting method and device in an RFID system including a first means for comparing a first mobile country code provided by the outside and a currently set second mobile country code, and generating a control signal for changing an RFID parameter setting of the RFID system according to the RFID standard that corresponds to the first mobile country code when the first mobile country code and the second mobile country code do not correspond with each other, and a second means for setting an operational frequency of the RFID system according to the control signal.

    摘要翻译: 本发明涉及一种RFID系统中的RFID参数设定方法和装置,其特征在于包括:第一装置,用于比较由外部提供的第一移动国家代码和当前设定的第二移动国家代码,并产生用于改变RFID参数的控制信号 当第一移动国家代码和第二移动国家代码彼此不对应时,根据与第一移动国家代码对应的RFID标准设置RFID系统;以及第二装置,用于设置RFID系统的操作频率 根据控制信号。