公开(公告)号：US20070109129A1

公开(公告)日：2007-05-17

申请号：US11622092

申请日：2007-01-11

申请人： Kurt Sundstrom ,  Scott Cooper ,  Amir Sarajedini ,  Aanand Esterberg ,  Todd Humes ,  Christopher Diorio

发明人： Kurt Sundstrom ,  Scott Cooper ,  Amir Sarajedini ,  Aanand Esterberg ,  Todd Humes ,  Christopher Diorio

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。

公开(公告)号：US20050237158A1

公开(公告)日：2005-10-27

申请号：US11090961

申请日：2005-03-25

申请人： Scott Cooper ,  Kurt Sundstrom ,  Aanand Esterberg ,  Christopher Diorio ,  Vincent Moretti ,  Todd Humes

发明人： Scott Cooper ,  Kurt Sundstrom ,  Aanand Esterberg ,  Christopher Diorio ,  Vincent Moretti ,  Todd Humes

IPC分类号： G06K7/00 ,  H04Q5/22

CPC分类号： G06K7/10049 ,  G06K7/0008

摘要： A process is disclosed for communicating with individual tags in a population of tags having a binary tree organization, wherein each tag corresponds to a leaf node of the binary tree. The process includes singulating a predetermined leaf node and returning to a designated re-entry node associated with the predetermined leaf node after singulating.

摘要翻译： 公开了一种与具有二叉树组织的标签群体中的各个标签通信的过程，其中每个标签对应于二叉树的叶节点。 该过程包括在分割之后，分割预定的叶节点并返回到与预定叶节点相关联的指定重入节点。

公开(公告)号：US20080006702A2

公开(公告)日：2008-01-10

申请号：US11114614

申请日：2005-04-25

申请人： Christopher Diorio ,  Kurt Sundstrom ,  Scott Cooper ,  Todd Humes

发明人： Christopher Diorio ,  Kurt Sundstrom ,  Scott Cooper ,  Todd Humes

IPC分类号： G06K19/06

CPC分类号： G06K19/0723 ,  G06K7/0008 ,  H03J1/0058

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。

公开(公告)号：US20070221737A2

公开(公告)日：2007-09-27

申请号：US11114614

申请日：2005-04-25

申请人： Christopher Diorio ,  Kurt Sundstrom ,  Scott Cooper ,  Todd Humes

发明人： Christopher Diorio ,  Kurt Sundstrom ,  Scott Cooper ,  Todd Humes

IPC分类号： G06K19/06

CPC分类号： G06K19/0723 ,  G06K7/0008 ,  H03J1/0058

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.

公开(公告)号：US20060163370A1

公开(公告)日：2006-07-27

申请号：US11114614

申请日：2005-04-25

申请人： Christopher Diorio ,  Kurt Sundstrom ,  Scott Cooper ,  Todd Humes

发明人： Christopher Diorio ,  Kurt Sundstrom ,  Scott Cooper ,  Todd Humes

IPC分类号： G06K19/06

CPC分类号： G06K19/0723 ,  G06K7/0008 ,  H03J1/0058

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.

公开(公告)号：US20070177738A1

公开(公告)日：2007-08-02

申请号：US11356885

申请日：2006-02-17

申请人： Christopher Diorio ,  Aanand Esterberg ,  Todd Humes

发明人： Christopher Diorio ,  Aanand Esterberg ,  Todd Humes

IPC分类号： H04K1/00

CPC分类号： G06K7/0008 ,  G06K7/10257 ,  H04L9/0656 ,  H04L2209/601 ,  H04L2209/805

摘要： Methods and apparatus provide secure two-way (reader-to-tag and tag-to-reader) RFID communications. According to one aspect, a tag receives a noise-encrypted RF carrier signal from a reader and backscatter modulates it with tag information. Eavesdroppers cannot extract the tag information from the backscattered signal because it is masked by the noise encryption.

摘要翻译： 方法和设备提供安全的双向（读写器到标签和标签到阅读器）RFID通信。 根据一个方面，标签从读取器接收噪声加密的RF载波信号，并用标签信息对后向散射进行调制。 窃听者无法从反向散射信号中提取标签信息，因为它被噪声加密掩蔽。

公开(公告)号：US20050058292A1

公开(公告)日：2005-03-17

申请号：US10660829

申请日：2003-09-11

申请人： Christopher Diorio ,  Aanand Esterberg ,  Todd Humes

发明人： Christopher Diorio ,  Aanand Esterberg ,  Todd Humes

IPC分类号： G06K7/00 ,  G06K17/00 ,  H04K1/00

CPC分类号： G06K7/0008 ,  G06K7/10257 ,  H04L9/0656 ,  H04L2209/601 ,  H04L2209/805

摘要： Methods and apparatus for providing secure two-way (reader-to-tag and tag-to-reader) RFID communications. According to one aspect of the invention, a tag receives a noise-encrypted RF carrier signal from a reader and backscatter modulates it with tag information. Eavesdroppers cannot extract the tag information from the backscattered signal because it is masked by the noise encryption. According to another aspect of the invention, establishing a secure two-way RFID communication link includes a reader modulating a carrier signal with a noise encryption signal and broadcasting the noise-encrypted carrier to a singulated tag. The tag backscatter modulates the noise-encrypted carrier with a first portion of a key and/or a one-time pad pseudorandom number. If a key is used, upon receiving the backscattered signal the reader verifies that the tag is authentic, and, if verified as authentic, transmits a second portion of the key, possibly encrypted by a function depending on the one-time pad pseudorandom number, to the tag.

摘要翻译： 用于提供安全双向（读写器到标签和标签到阅读器）RFID通信的方法和设备。 根据本发明的一个方面，标签从读取器接收噪声加密的RF载波信号，并用标签信息对后向散射进行调制。 窃听者无法从反向散射信号中提取标签信息，因为它被噪声加密掩蔽。 根据本发明的另一方面，建立安全双向RFID通信链路包括读取器，利用噪声加密信号调制载波信号，并将经噪声加密的载波广播到单个标签。 标签反向散射利用键的第一部分和/或一次性衬垫伪随机数来调制噪声加密的载波。 如果使用密钥，则在接收到反向散射信号时，读取器验证标签是可信的，并且如果被证实为真实的，则发送密钥的第二部分，可能由根据一次性衬垫伪随机数的功能加密， 到标签。

公开(公告)号：US20060261955A1

公开(公告)日：2006-11-23

申请号：US11412172

申请日：2006-04-25

申请人： Todd Humes ,  Christopher Diorio ,  Kurt Sundstrom ,  Paul Dietrich

发明人： Todd Humes ,  Christopher Diorio ,  Kurt Sundstrom ,  Paul Dietrich

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 encountered in conjunction with using a selected channel is detected and used to adjust a waveform shaping parameter in combination with a performance requirement. 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 adjusted 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。 检测并结合使用所选通道遇到的RF能量，并结合演奏要求调整波形整形参数。 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标签发射或反向散射的至少一些RF波具有根据经调整的波形整形参数的形状的波形。

公开(公告)号：US20060261954A1

公开(公告)日：2006-11-23

申请号：US11412171

申请日：2006-04-25

申请人： Paul Dietrich ,  Christopher Diorio ,  Kurt Sundstrom ,  Todd Humes

发明人： Paul Dietrich ,  Christopher Diorio ,  Kurt Sundstrom ,  Todd Humes

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。

公开(公告)号：US20060261956A1

公开(公告)日：2006-11-23

申请号：US11412192

申请日：2006-04-25

申请人： Kurt Sundstrom ,  Christopher Diorio ,  Todd Humes ,  Paul Dietrich

发明人： Kurt Sundstrom ,  Christopher Diorio ,  Todd Humes ,  Paul Dietrich

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 encountered in conjunction with using a selected channel is detected. The RF energy can be a signal from another RFID reader. The detected signal is used to adjust a waveform shaping parameter. 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 adjusted 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。 检测到结合使用所选择的频道遇到的RF能量。 RF能量可以是来自另一RFID读取器的信号。 检测到的信号用于调整波形整形参数。 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标签发射或反向散射的至少一些RF波具有根据经调整的波形整形参数的形状的波形。