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1. 发明申请

WO2005085899A1 OBJECT LOCATION SYSTEM AND METHOD USING RFID 审中-公开
标题翻译：对象位置系统和使用RFID的方法
公开(公告)号：WO2005085899A1
公开(公告)日：2005-09-15
申请号：PCT/US2005/005897
申请日：2005-02-25
申请人： SYMBOL TECHNOLOGIES, INC. , BRIDGELALL, Raj , DURON, Mark, William , STRZELCZYK, Martin, J.
发明人： BRIDGELALL, Raj , DURON, Mark, William , STRZELCZYK, Martin, J.
IPC分类号： G01S13/87
CPC分类号： G01S13/32 , G01S13/346 , G01S13/46 , G01S13/878 , G01S2013/466
摘要： A system and method is provided for locating objects using RFID tags. The system and method uses an RFID reader and a distance calculator to efficiently and accurately determine the location of objects that include an RFID tag. The RFID reader transmits a plurality of signals to the RFID tag, with the plurality of signals having different fundamental frequencies. In response, the RFID tag backscatter modulates the plurality of transmitted signals to create a plurality of backscatter-modulated signals. The RFID reader receives and demodulates the plurality of backscatter-modulated signals. The distance calculator determines the phase of the plurality of backscatter-modulated signals and determines a rate of change of the phase in the backscatter-modulated signals with respect to the rate of change in the fundamental frequency of the transmitted signals and uses this information to calculate the distance to the RFID tag.
摘要翻译：提供了一种使用RFID标签定位物体的系统和方法。该系统和方法使用RFID读取器和距离计算器来有效和准确地确定包括RFID标签的对象的位置。 RFID读取器将多个信号发送到RFID标签，多个信号具有不同的基本频率。作为响应，RFID标签反向散射调制多个发射信号以产生多个反向散射调制信号。 RFID读取器接收并解调多个反向散射调制信号。距离计算器确定多个反向散射调制信号的相位，并且确定后向散射调制信号中的相位相对于发射信号的基频的变化率的变化率，并使用该信息来计算到RFID标签的距离。

2. 发明授权

EP1721187B1 OBJECT LOCATION SYSTEM AND METHOD USING RFID 有权转让
标题翻译：目标定位系统和方法RFID
公开(公告)号：EP1721187B1
公开(公告)日：2013-07-24
申请号：EP05723669.7
申请日：2005-02-25
申请人： Symbol Technologies, Inc.
发明人： BRIDGELALL, Raj , DURON, Mark, William , STRZELCZYK, Martin, J.
IPC分类号： G01S13/87 , G01S13/32
CPC分类号： G01S13/32 , G01S13/346 , G01S13/46 , G01S13/878 , G01S2013/466

3. 发明公开

EP1721187A1 OBJECT LOCATION SYSTEM AND METHOD USING RFID 有权转让
标题翻译：目标定位系统和方法RFID
公开(公告)号：EP1721187A1
公开(公告)日：2006-11-15
申请号：EP05723669.7
申请日：2005-02-25
申请人： SYMBOL TECHNOLOGIES, INC.
发明人： BRIDGELALL, Raj , DURON, Mark, William , STRZELCZYK, Martin, J.
IPC分类号： G01S13/87 , G01S13/32
CPC分类号： G01S13/32 , G01S13/346 , G01S13/46 , G01S13/878 , G01S2013/466
摘要： A system and method is provided for locating objects using RFID tags. The system and method uses an RFID reader and a distance calculator to efficiently and accurately determine the location of objects that include an RFID tag. The RFID reader transmits a plurality of signals to the RFID tag, with the plurality of signals having different fundamental frequencies. In response, the RFID tag backscatter modulates the plurality of transmitted signals to create a plurality of backscatter-modulated signals. The RFID reader receives and demodulates the plurality of backscatter-modulated signals. The distance calculator determines the phase of the plurality of backscatter-modulated signals and determines a rate of change of the phase in the backscatter-modulated signals with respect to the rate of change in the fundamental frequency of the transmitted signals and uses this information to calculate the distance to the RFID tag.

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