公开(公告)号：US20050225435A1

公开(公告)日：2005-10-13

申请号：US10823991

申请日：2004-04-13

申请人： Christopher Diorio ,  Scott Cooper ,  John Hyde ,  Amir Sarajedini ,  Kurt Sundstrom

发明人： Christopher Diorio ,  Scott Cooper ,  John Hyde ,  Amir Sarajedini ,  Kurt Sundstrom

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。

公开(公告)号：US07183926B2

公开(公告)日：2007-02-27

申请号：US10823991

申请日：2004-04-13

申请人： Christopher J. Diorio ,  Scott Anthony Cooper ,  John D. Hyde ,  Amir Sarajedini ,  Kurt Eugene Sundstrom

发明人： Christopher J. Diorio ,  Scott Anthony Cooper ,  John D. Hyde ,  Amir Sarajedini ,  Kurt Eugene Sundstrom

IPC分类号： H04B1/06 ,  H04B7/00 ,  G01S13/75

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。

公开(公告)号：US08350665B1

公开(公告)日：2013-01-08

申请号：US13407742

申请日：2012-02-28

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

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

IPC分类号： G05B23/02 ,  G05B11/01 ,  H04Q5/22 ,  H04B7/14 ,  H04B1/16 ,  G06F7/00 ,  H03D3/00

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：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。